# HG changeset patch
# User cl349@xxxxxxxxxxxxxxxxxxxx
# Node ID 1c7145a5bb434413204a3ce4114de7f58fbb9029
# Parent a05e56904e7e5e86aae5a2e022621caaf7b3a6f5
Update to Linux 2.6.16-rc4.
Signed-off-by: Christian Limpach <Christian.Limpach@xxxxxxxxxxxx>
diff -r a05e56904e7e -r 1c7145a5bb43 buildconfigs/mk.linux-2.6-xen
--- a/buildconfigs/mk.linux-2.6-xen Mon Feb 20 23:01:50 2006
+++ b/buildconfigs/mk.linux-2.6-xen Tue Feb 21 11:19:13 2006
@@ -2,8 +2,8 @@
OS = linux
LINUX_SERIES = 2.6
-LINUX_VER = 2.6.16-rc3
-LINUX_SRCS = linux-2.6.15.tar.bz2 patch-2.6.16-rc3.bz2
+LINUX_VER = 2.6.16-rc4
+LINUX_SRCS = linux-2.6.15.tar.bz2 patch-2.6.16-rc4.bz2
LINUX_PDIR = linux-$(LINUX_VER)
EXTRAVERSION ?= xen
@@ -34,7 +34,7 @@
touch $(@D)/.hgskip
touch $@
-pristine-linux-%.16-rc3/.valid-pristine: pristine-$(LINUX_PDIR)/.valid-srcs
+pristine-linux-%.16-rc4/.valid-pristine: pristine-$(LINUX_PDIR)/.valid-srcs
touch $@ # update timestamp to avoid rebuild
$(LINUX_DIR)/include/linux/autoconf.h: ref-$(OS)-$(LINUX_VER)/.valid-ref
diff -r a05e56904e7e -r 1c7145a5bb43
linux-2.6-xen-sparse/arch/x86_64/kernel/io_apic-xen.c
--- a/linux-2.6-xen-sparse/arch/x86_64/kernel/io_apic-xen.c Mon Feb 20
23:01:50 2006
+++ b/linux-2.6-xen-sparse/arch/x86_64/kernel/io_apic-xen.c Tue Feb 21
11:19:13 2006
@@ -30,6 +30,9 @@
#include <linux/mc146818rtc.h>
#include <linux/acpi.h>
#include <linux/sysdev.h>
+#ifdef CONFIG_ACPI
+#include <acpi/acpi_bus.h>
+#endif
#include <asm/io.h>
#include <asm/smp.h>
@@ -309,6 +312,8 @@
Can be overwritten with "apic"
And another hack to disable the IOMMU on VIA chipsets.
+
+ ... and others. Really should move this somewhere else.
Kludge-O-Rama. */
void __init check_ioapic(void)
@@ -358,6 +363,17 @@
#ifndef CONFIG_XEN
if (apic_runs_main_timer != 0)
break;
+#ifdef CONFIG_ACPI
+ /* Don't do this for laptops right
+ right now because their timer
+ doesn't necessarily tick in C2/3 */
+ if (acpi_fadt.revision >= 3 &&
+ (acpi_fadt.plvl2_lat + acpi_fadt.plvl3_lat) < 1100) {
+ printk(KERN_INFO
+"ATI board detected, but seems to be a laptop. Timer might be shakey,
sorry\n");
+ break;
+ }
+#endif
printk(KERN_INFO
"ATI board detected. Using APIC/PM timer.\n");
apic_runs_main_timer = 1;
diff -r a05e56904e7e -r 1c7145a5bb43
linux-2.6-xen-sparse/arch/x86_64/kernel/mpparse-xen.c
--- a/linux-2.6-xen-sparse/arch/x86_64/kernel/mpparse-xen.c Mon Feb 20
23:01:50 2006
+++ b/linux-2.6-xen-sparse/arch/x86_64/kernel/mpparse-xen.c Tue Feb 21
11:19:13 2006
@@ -295,9 +295,9 @@
memcpy(str,mpc->mpc_productid,12);
str[12]=0;
- printk(KERN_INFO "Product ID: %s ",str);
-
- printk(KERN_INFO "APIC at: 0x%X\n",mpc->mpc_lapic);
+ printk("Product ID: %s ",str);
+
+ printk("APIC at: 0x%X\n",mpc->mpc_lapic);
/* save the local APIC address, it might be non-default */
if (!acpi_lapic)
diff -r a05e56904e7e -r 1c7145a5bb43 linux-2.6-xen-sparse/drivers/char/tty_io.c
--- a/linux-2.6-xen-sparse/drivers/char/tty_io.c Mon Feb 20 23:01:50 2006
+++ b/linux-2.6-xen-sparse/drivers/char/tty_io.c Tue Feb 21 11:19:13 2006
@@ -1843,7 +1843,6 @@
tty_closing = tty->count <= 1;
o_tty_closing = o_tty &&
(o_tty->count <= (pty_master ? 1 : 0));
- up(&tty_sem);
do_sleep = 0;
if (tty_closing) {
@@ -1871,6 +1870,7 @@
printk(KERN_WARNING "release_dev: %s: read/write wait queue "
"active!\n", tty_name(tty, buf));
+ up(&tty_sem);
schedule();
}
@@ -1879,8 +1879,6 @@
* both sides, and we've completed the last operation that could
* block, so it's safe to proceed with closing.
*/
-
- down(&tty_sem);
if (pty_master) {
if (--o_tty->count < 0) {
printk(KERN_WARNING "release_dev: bad pty slave count "
@@ -1894,7 +1892,6 @@
tty->count, tty_name(tty, buf));
tty->count = 0;
}
- up(&tty_sem);
/*
* We've decremented tty->count, so we need to remove this file
@@ -1938,6 +1935,8 @@
} while_each_task_pid(o_tty->session, PIDTYPE_SID, p);
read_unlock(&tasklist_lock);
}
+
+ up(&tty_sem);
/* check whether both sides are closing ... */
if (!tty_closing || (o_tty && !o_tty_closing))
diff -r a05e56904e7e -r 1c7145a5bb43 linux-2.6-xen-sparse/drivers/serial/Kconfig
--- a/linux-2.6-xen-sparse/drivers/serial/Kconfig Mon Feb 20 23:01:50 2006
+++ b/linux-2.6-xen-sparse/drivers/serial/Kconfig Tue Feb 21 11:19:13 2006
@@ -903,8 +903,8 @@
something like this to connect more than two modems to your Linux
box, for instance in order to become a dial-in server. This driver
supports PCI boards only.
- If you have a card like this, say Y here and read the file
- <file:Documentation/jsm.txt>.
+
+ If you have a card like this, say Y here, otherwise say N.
To compile this driver as a module, choose M here: the
module will be called jsm.
diff -r a05e56904e7e -r 1c7145a5bb43 linux-2.6-xen-sparse/include/linux/mm.h
--- a/linux-2.6-xen-sparse/include/linux/mm.h Mon Feb 20 23:01:50 2006
+++ b/linux-2.6-xen-sparse/include/linux/mm.h Tue Feb 21 11:19:13 2006
@@ -1064,5 +1064,7 @@
void drop_pagecache(void);
void drop_slab(void);
+extern int randomize_va_space;
+
#endif /* __KERNEL__ */
#endif /* _LINUX_MM_H */
diff -r a05e56904e7e -r 1c7145a5bb43 linux-2.6-xen-sparse/mm/memory.c
--- a/linux-2.6-xen-sparse/mm/memory.c Mon Feb 20 23:01:50 2006
+++ b/linux-2.6-xen-sparse/mm/memory.c Tue Feb 21 11:19:13 2006
@@ -81,6 +81,16 @@
EXPORT_SYMBOL(num_physpages);
EXPORT_SYMBOL(high_memory);
EXPORT_SYMBOL(vmalloc_earlyreserve);
+
+int randomize_va_space __read_mostly = 1;
+
+static int __init disable_randmaps(char *s)
+{
+ randomize_va_space = 0;
+ return 0;
+}
+__setup("norandmaps", disable_randmaps);
+
/*
* If a p?d_bad entry is found while walking page tables, report
diff -r a05e56904e7e -r 1c7145a5bb43 linux-2.6-xen-sparse/mm/page_alloc.c
--- a/linux-2.6-xen-sparse/mm/page_alloc.c Mon Feb 20 23:01:50 2006
+++ b/linux-2.6-xen-sparse/mm/page_alloc.c Tue Feb 21 11:19:13 2006
@@ -56,6 +56,7 @@
int percpu_pagelist_fraction;
static void fastcall free_hot_cold_page(struct page *page, int cold);
+static void __free_pages_ok(struct page *page, unsigned int order);
/*
* results with 256, 32 in the lowmem_reserve sysctl:
@@ -169,20 +170,23 @@
* All pages have PG_compound set. All pages have their ->private pointing at
* the head page (even the head page has this).
*
- * The first tail page's ->mapping, if non-zero, holds the address of the
- * compound page's put_page() function.
- *
- * The order of the allocation is stored in the first tail page's ->index
- * This is only for debug at present. This usage means that zero-order pages
- * may not be compound.
- */
+ * The first tail page's ->lru.next holds the address of the compound page's
+ * put_page() function. Its ->lru.prev holds the order of allocation.
+ * This usage means that zero-order pages may not be compound.
+ */
+
+static void free_compound_page(struct page *page)
+{
+ __free_pages_ok(page, (unsigned long)page[1].lru.prev);
+}
+
static void prep_compound_page(struct page *page, unsigned long order)
{
int i;
int nr_pages = 1 << order;
- page[1].mapping = NULL;
- page[1].index = order;
+ page[1].lru.next = (void *)free_compound_page; /* set dtor */
+ page[1].lru.prev = (void *)order;
for (i = 0; i < nr_pages; i++) {
struct page *p = page + i;
@@ -196,7 +200,7 @@
int i;
int nr_pages = 1 << order;
- if (unlikely(page[1].index != order))
+ if (unlikely((unsigned long)page[1].lru.prev != order))
bad_page(page);
for (i = 0; i < nr_pages; i++) {
@@ -1539,28 +1543,28 @@
*/
static int __init find_next_best_node(int node, nodemask_t *used_node_mask)
{
- int i, n, val;
+ int n, val;
int min_val = INT_MAX;
int best_node = -1;
- for_each_online_node(i) {
+ /* Use the local node if we haven't already */
+ if (!node_isset(node, *used_node_mask)) {
+ node_set(node, *used_node_mask);
+ return node;
+ }
+
+ for_each_online_node(n) {
cpumask_t tmp;
-
- /* Start from local node */
- n = (node+i) % num_online_nodes();
/* Don't want a node to appear more than once */
if (node_isset(n, *used_node_mask))
continue;
- /* Use the local node if we haven't already */
- if (!node_isset(node, *used_node_mask)) {
- best_node = node;
- break;
- }
-
/* Use the distance array to find the distance */
val = node_distance(node, n);
+
+ /* Penalize nodes under us ("prefer the next node") */
+ val += (n < node);
/* Give preference to headless and unused nodes */
tmp = node_to_cpumask(n);
diff -r a05e56904e7e -r 1c7145a5bb43
patches/linux-2.6.16-rc4/i386-mach-io-check-nmi.patch
--- /dev/null Mon Feb 20 23:01:50 2006
+++ b/patches/linux-2.6.16-rc4/i386-mach-io-check-nmi.patch Tue Feb 21
11:19:13 2006
@@ -0,0 +1,45 @@
+diff -pruN ../pristine-linux-2.6.16-rc3/arch/i386/kernel/traps.c
./arch/i386/kernel/traps.c
+--- ../pristine-linux-2.6.16-rc3/arch/i386/kernel/traps.c 2006-02-15
20:38:51.000000000 +0000
++++ ./arch/i386/kernel/traps.c 2006-02-15 20:40:43.000000000 +0000
+@@ -567,18 +567,11 @@ static void mem_parity_error(unsigned ch
+
+ static void io_check_error(unsigned char reason, struct pt_regs * regs)
+ {
+- unsigned long i;
+-
+ printk(KERN_EMERG "NMI: IOCK error (debug interrupt?)\n");
+ show_registers(regs);
+
+ /* Re-enable the IOCK line, wait for a few seconds */
+- reason = (reason & 0xf) | 8;
+- outb(reason, 0x61);
+- i = 2000;
+- while (--i) udelay(1000);
+- reason &= ~8;
+- outb(reason, 0x61);
++ clear_io_check_error(reason);
+ }
+
+ static void unknown_nmi_error(unsigned char reason, struct pt_regs * regs)
+diff -pruN
../pristine-linux-2.6.16-rc3/include/asm-i386/mach-default/mach_traps.h
./include/asm-i386/mach-default/mach_traps.h
+--- ../pristine-linux-2.6.16-rc3/include/asm-i386/mach-default/mach_traps.h
2006-01-03 03:21:10.000000000 +0000
++++ ./include/asm-i386/mach-default/mach_traps.h 2006-02-15
20:40:43.000000000 +0000
+@@ -15,6 +15,18 @@ static inline void clear_mem_error(unsig
+ outb(reason, 0x61);
+ }
+
++static inline void clear_io_check_error(unsigned char reason)
++{
++ unsigned long i;
++
++ reason = (reason & 0xf) | 8;
++ outb(reason, 0x61);
++ i = 2000;
++ while (--i) udelay(1000);
++ reason &= ~8;
++ outb(reason, 0x61);
++}
++
+ static inline unsigned char get_nmi_reason(void)
+ {
+ return inb(0x61);
diff -r a05e56904e7e -r 1c7145a5bb43 patches/linux-2.6.16-rc4/net-csum.patch
--- /dev/null Mon Feb 20 23:01:50 2006
+++ b/patches/linux-2.6.16-rc4/net-csum.patch Tue Feb 21 11:19:13 2006
@@ -0,0 +1,41 @@
+diff -pruN
../pristine-linux-2.6.16-rc1-git4/net/ipv4/netfilter/ip_nat_proto_tcp.c
./net/ipv4/netfilter/ip_nat_proto_tcp.c
+--- ../pristine-linux-2.6.16-rc1-git4/net/ipv4/netfilter/ip_nat_proto_tcp.c
2006-02-02 17:39:51.000000000 +0000
++++ ./net/ipv4/netfilter/ip_nat_proto_tcp.c 2006-02-02 17:44:18.000000000
+0000
+@@ -129,10 +129,14 @@ tcp_manip_pkt(struct sk_buff **pskb,
+ if (hdrsize < sizeof(*hdr))
+ return 1;
+
+- hdr->check = ip_nat_cheat_check(~oldip, newip,
++ if ((*pskb)->proto_csum_blank) {
++ hdr->check = ip_nat_cheat_check(oldip, ~newip, hdr->check);
++ } else {
++ hdr->check = ip_nat_cheat_check(~oldip, newip,
+ ip_nat_cheat_check(oldport ^ 0xFFFF,
+ newport,
+ hdr->check));
++ }
+ return 1;
+ }
+
+diff -pruN
../pristine-linux-2.6.16-rc1-git4/net/ipv4/netfilter/ip_nat_proto_udp.c
./net/ipv4/netfilter/ip_nat_proto_udp.c
+--- ../pristine-linux-2.6.16-rc1-git4/net/ipv4/netfilter/ip_nat_proto_udp.c
2006-02-02 17:39:51.000000000 +0000
++++ ./net/ipv4/netfilter/ip_nat_proto_udp.c 2006-02-02 17:44:18.000000000
+0000
+@@ -113,11 +113,16 @@ udp_manip_pkt(struct sk_buff **pskb,
+ newport = tuple->dst.u.udp.port;
+ portptr = &hdr->dest;
+ }
+- if (hdr->check) /* 0 is a special case meaning no checksum */
+- hdr->check = ip_nat_cheat_check(~oldip, newip,
++ if (hdr->check) { /* 0 is a special case meaning no checksum */
++ if ((*pskb)->proto_csum_blank) {
++ hdr->check = ip_nat_cheat_check(oldip, ~newip,
hdr->check);
++ } else {
++ hdr->check = ip_nat_cheat_check(~oldip, newip,
+ ip_nat_cheat_check(*portptr ^ 0xFFFF,
+ newport,
+ hdr->check));
++ }
++ }
+ *portptr = newport;
+ return 1;
+ }
diff -r a05e56904e7e -r 1c7145a5bb43 patches/linux-2.6.16-rc4/pmd-shared.patch
--- /dev/null Mon Feb 20 23:01:50 2006
+++ b/patches/linux-2.6.16-rc4/pmd-shared.patch Tue Feb 21 11:19:13 2006
@@ -0,0 +1,111 @@
+diff -pruN ../pristine-linux-2.6.16-rc1-git4/arch/i386/mm/pageattr.c
./arch/i386/mm/pageattr.c
+--- ../pristine-linux-2.6.16-rc1-git4/arch/i386/mm/pageattr.c 2006-02-02
17:39:29.000000000 +0000
++++ ./arch/i386/mm/pageattr.c 2006-02-02 17:45:14.000000000 +0000
+@@ -78,7 +78,7 @@ static void set_pmd_pte(pte_t *kpte, uns
+ unsigned long flags;
+
+ set_pte_atomic(kpte, pte); /* change init_mm */
+- if (PTRS_PER_PMD > 1)
++ if (HAVE_SHARED_KERNEL_PMD)
+ return;
+
+ spin_lock_irqsave(&pgd_lock, flags);
+diff -pruN ../pristine-linux-2.6.16-rc1-git4/arch/i386/mm/pgtable.c
./arch/i386/mm/pgtable.c
+--- ../pristine-linux-2.6.16-rc1-git4/arch/i386/mm/pgtable.c 2006-01-03
03:21:10.000000000 +0000
++++ ./arch/i386/mm/pgtable.c 2006-02-02 17:45:14.000000000 +0000
+@@ -215,9 +215,10 @@ void pgd_ctor(void *pgd, kmem_cache_t *c
+ spin_lock_irqsave(&pgd_lock, flags);
+ }
+
+- clone_pgd_range((pgd_t *)pgd + USER_PTRS_PER_PGD,
+- swapper_pg_dir + USER_PTRS_PER_PGD,
+- KERNEL_PGD_PTRS);
++ if (PTRS_PER_PMD == 1 || HAVE_SHARED_KERNEL_PMD)
++ clone_pgd_range((pgd_t *)pgd + USER_PTRS_PER_PGD,
++ swapper_pg_dir + USER_PTRS_PER_PGD,
++ KERNEL_PGD_PTRS);
+ if (PTRS_PER_PMD > 1)
+ return;
+
+@@ -249,6 +250,30 @@ pgd_t *pgd_alloc(struct mm_struct *mm)
+ goto out_oom;
+ set_pgd(&pgd[i], __pgd(1 + __pa(pmd)));
+ }
++
++ if (!HAVE_SHARED_KERNEL_PMD) {
++ unsigned long flags;
++
++ for (i = USER_PTRS_PER_PGD; i < PTRS_PER_PGD; i++) {
++ pmd_t *pmd = kmem_cache_alloc(pmd_cache, GFP_KERNEL);
++ if (!pmd)
++ goto out_oom;
++ set_pgd(&pgd[USER_PTRS_PER_PGD], __pgd(1 + __pa(pmd)));
++ }
++
++ spin_lock_irqsave(&pgd_lock, flags);
++ for (i = USER_PTRS_PER_PGD; i < PTRS_PER_PGD; i++) {
++ unsigned long v = (unsigned long)i << PGDIR_SHIFT;
++ pgd_t *kpgd = pgd_offset_k(v);
++ pud_t *kpud = pud_offset(kpgd, v);
++ pmd_t *kpmd = pmd_offset(kpud, v);
++ pmd_t *pmd = (void *)__va(pgd_val(pgd[i])-1);
++ memcpy(pmd, kpmd, PAGE_SIZE);
++ }
++ pgd_list_add(pgd);
++ spin_unlock_irqrestore(&pgd_lock, flags);
++ }
++
+ return pgd;
+
+ out_oom:
+@@ -263,9 +288,23 @@ void pgd_free(pgd_t *pgd)
+ int i;
+
+ /* in the PAE case user pgd entries are overwritten before usage */
+- if (PTRS_PER_PMD > 1)
+- for (i = 0; i < USER_PTRS_PER_PGD; ++i)
+- kmem_cache_free(pmd_cache, (void
*)__va(pgd_val(pgd[i])-1));
++ if (PTRS_PER_PMD > 1) {
++ for (i = 0; i < USER_PTRS_PER_PGD; ++i) {
++ pmd_t *pmd = (void *)__va(pgd_val(pgd[i])-1);
++ kmem_cache_free(pmd_cache, pmd);
++ }
++ if (!HAVE_SHARED_KERNEL_PMD) {
++ unsigned long flags;
++ spin_lock_irqsave(&pgd_lock, flags);
++ pgd_list_del(pgd);
++ spin_unlock_irqrestore(&pgd_lock, flags);
++ for (i = USER_PTRS_PER_PGD; i < PTRS_PER_PGD; i++) {
++ pmd_t *pmd = (void *)__va(pgd_val(pgd[i])-1);
++ memset(pmd, 0, PTRS_PER_PMD*sizeof(pmd_t));
++ kmem_cache_free(pmd_cache, pmd);
++ }
++ }
++ }
+ /* in the non-PAE case, free_pgtables() clears user pgd entries */
+ kmem_cache_free(pgd_cache, pgd);
+ }
+diff -pruN
../pristine-linux-2.6.16-rc1-git4/include/asm-i386/pgtable-2level-defs.h
./include/asm-i386/pgtable-2level-defs.h
+--- ../pristine-linux-2.6.16-rc1-git4/include/asm-i386/pgtable-2level-defs.h
2006-01-03 03:21:10.000000000 +0000
++++ ./include/asm-i386/pgtable-2level-defs.h 2006-02-02 17:45:14.000000000
+0000
+@@ -1,6 +1,8 @@
+ #ifndef _I386_PGTABLE_2LEVEL_DEFS_H
+ #define _I386_PGTABLE_2LEVEL_DEFS_H
+
++#define HAVE_SHARED_KERNEL_PMD 0
++
+ /*
+ * traditional i386 two-level paging structure:
+ */
+diff -pruN
../pristine-linux-2.6.16-rc1-git4/include/asm-i386/pgtable-3level-defs.h
./include/asm-i386/pgtable-3level-defs.h
+--- ../pristine-linux-2.6.16-rc1-git4/include/asm-i386/pgtable-3level-defs.h
2006-01-03 03:21:10.000000000 +0000
++++ ./include/asm-i386/pgtable-3level-defs.h 2006-02-02 17:45:14.000000000
+0000
+@@ -1,6 +1,8 @@
+ #ifndef _I386_PGTABLE_3LEVEL_DEFS_H
+ #define _I386_PGTABLE_3LEVEL_DEFS_H
+
++#define HAVE_SHARED_KERNEL_PMD 1
++
+ /*
+ * PGDIR_SHIFT determines what a top-level page table entry can map
+ */
diff -r a05e56904e7e -r 1c7145a5bb43 patches/linux-2.6.16-rc4/smp-alts.patch
--- /dev/null Mon Feb 20 23:01:50 2006
+++ b/patches/linux-2.6.16-rc4/smp-alts.patch Tue Feb 21 11:19:13 2006
@@ -0,0 +1,591 @@
+diff -pruN ../pristine-linux-2.6.16-rc3/arch/i386/Kconfig ./arch/i386/Kconfig
+--- ../pristine-linux-2.6.16-rc3/arch/i386/Kconfig 2006-02-15
20:38:51.000000000 +0000
++++ ./arch/i386/Kconfig 2006-02-15 20:45:57.000000000 +0000
+@@ -202,6 +202,19 @@ config SMP
+
+ If you don't know what to do here, say N.
+
++config SMP_ALTERNATIVES
++ bool "SMP alternatives support (EXPERIMENTAL)"
++ depends on SMP && EXPERIMENTAL
++ help
++ Try to reduce the overhead of running an SMP kernel on a uniprocessor
++ host slightly by replacing certain key instruction sequences
++ according to whether we currently have more than one CPU available.
++ This should provide a noticeable boost to performance when
++ running SMP kernels on UP machines, and have negligible impact
++ when running on an true SMP host.
++
++ If unsure, say N.
++
+ config NR_CPUS
+ int "Maximum number of CPUs (2-255)"
+ range 2 255
+diff -pruN ../pristine-linux-2.6.16-rc3/arch/i386/kernel/Makefile
./arch/i386/kernel/Makefile
+--- ../pristine-linux-2.6.16-rc3/arch/i386/kernel/Makefile 2006-02-15
20:38:51.000000000 +0000
++++ ./arch/i386/kernel/Makefile 2006-02-15 20:45:57.000000000 +0000
+@@ -37,6 +37,7 @@ obj-$(CONFIG_EFI) += efi.o efi_stub.o
+ obj-$(CONFIG_DOUBLEFAULT) += doublefault.o
+ obj-$(CONFIG_VM86) += vm86.o
+ obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
++obj-$(CONFIG_SMP_ALTERNATIVES) += smpalts.o
+
+ EXTRA_AFLAGS := -traditional
+
+diff -pruN ../pristine-linux-2.6.16-rc3/arch/i386/kernel/smpalts.c
./arch/i386/kernel/smpalts.c
+--- ../pristine-linux-2.6.16-rc3/arch/i386/kernel/smpalts.c 1970-01-01
01:00:00.000000000 +0100
++++ ./arch/i386/kernel/smpalts.c 2006-02-15 20:45:57.000000000 +0000
+@@ -0,0 +1,85 @@
++#include <linux/kernel.h>
++#include <asm/system.h>
++#include <asm/smp_alt.h>
++#include <asm/processor.h>
++#include <asm/string.h>
++
++struct smp_replacement_record {
++ unsigned char targ_size;
++ unsigned char smp1_size;
++ unsigned char smp2_size;
++ unsigned char up_size;
++ unsigned char feature;
++ unsigned char data[0];
++};
++
++struct smp_alternative_record {
++ void *targ_start;
++ struct smp_replacement_record *repl;
++};
++
++extern struct smp_alternative_record __start_smp_alternatives_table,
++ __stop_smp_alternatives_table;
++extern unsigned long __init_begin, __init_end;
++
++void prepare_for_smp(void)
++{
++ struct smp_alternative_record *r;
++ printk(KERN_INFO "Enabling SMP...\n");
++ for (r = &__start_smp_alternatives_table;
++ r != &__stop_smp_alternatives_table;
++ r++) {
++ BUG_ON(r->repl->targ_size < r->repl->smp1_size);
++ BUG_ON(r->repl->targ_size < r->repl->smp2_size);
++ BUG_ON(r->repl->targ_size < r->repl->up_size);
++ if (system_state == SYSTEM_RUNNING &&
++ r->targ_start >= (void *)&__init_begin &&
++ r->targ_start < (void *)&__init_end)
++ continue;
++ if (r->repl->feature != (unsigned char)-1 &&
++ boot_cpu_has(r->repl->feature)) {
++ memcpy(r->targ_start,
++ r->repl->data + r->repl->smp1_size,
++ r->repl->smp2_size);
++ memset(r->targ_start + r->repl->smp2_size,
++ 0x90,
++ r->repl->targ_size - r->repl->smp2_size);
++ } else {
++ memcpy(r->targ_start,
++ r->repl->data,
++ r->repl->smp1_size);
++ memset(r->targ_start + r->repl->smp1_size,
++ 0x90,
++ r->repl->targ_size - r->repl->smp1_size);
++ }
++ }
++ /* Paranoia */
++ asm volatile ("jmp 1f\n1:");
++ mb();
++}
++
++void unprepare_for_smp(void)
++{
++ struct smp_alternative_record *r;
++ printk(KERN_INFO "Disabling SMP...\n");
++ for (r = &__start_smp_alternatives_table;
++ r != &__stop_smp_alternatives_table;
++ r++) {
++ BUG_ON(r->repl->targ_size < r->repl->smp1_size);
++ BUG_ON(r->repl->targ_size < r->repl->smp2_size);
++ BUG_ON(r->repl->targ_size < r->repl->up_size);
++ if (system_state == SYSTEM_RUNNING &&
++ r->targ_start >= (void *)&__init_begin &&
++ r->targ_start < (void *)&__init_end)
++ continue;
++ memcpy(r->targ_start,
++ r->repl->data + r->repl->smp1_size + r->repl->smp2_size,
++ r->repl->up_size);
++ memset(r->targ_start + r->repl->up_size,
++ 0x90,
++ r->repl->targ_size - r->repl->up_size);
++ }
++ /* Paranoia */
++ asm volatile ("jmp 1f\n1:");
++ mb();
++}
+diff -pruN ../pristine-linux-2.6.16-rc3/arch/i386/kernel/smpboot.c
./arch/i386/kernel/smpboot.c
+--- ../pristine-linux-2.6.16-rc3/arch/i386/kernel/smpboot.c 2006-02-15
20:38:51.000000000 +0000
++++ ./arch/i386/kernel/smpboot.c 2006-02-15 20:45:57.000000000 +0000
+@@ -1214,6 +1214,11 @@ static void __init smp_boot_cpus(unsigne
+ if (max_cpus <= cpucount+1)
+ continue;
+
++#ifdef CONFIG_SMP_ALTERNATIVES
++ if (kicked == 1)
++ prepare_for_smp();
++#endif
++
+ if (((cpu = alloc_cpu_id()) <= 0) || do_boot_cpu(apicid, cpu))
+ printk("CPU #%d not responding - cannot use it.\n",
+ apicid);
+@@ -1392,6 +1397,11 @@ int __devinit __cpu_up(unsigned int cpu)
+ return -EIO;
+ }
+
++#ifdef CONFIG_SMP_ALTERNATIVES
++ if (num_online_cpus() == 1)
++ prepare_for_smp();
++#endif
++
+ local_irq_enable();
+ per_cpu(cpu_state, cpu) = CPU_UP_PREPARE;
+ /* Unleash the CPU! */
+diff -pruN ../pristine-linux-2.6.16-rc3/arch/i386/kernel/vmlinux.lds.S
./arch/i386/kernel/vmlinux.lds.S
+--- ../pristine-linux-2.6.16-rc3/arch/i386/kernel/vmlinux.lds.S
2006-01-03 03:21:10.000000000 +0000
++++ ./arch/i386/kernel/vmlinux.lds.S 2006-02-15 20:45:57.000000000 +0000
+@@ -34,6 +34,13 @@ SECTIONS
+ __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { *(__ex_table) }
+ __stop___ex_table = .;
+
++ . = ALIGN(16);
++ __start_smp_alternatives_table = .;
++ __smp_alternatives : { *(__smp_alternatives) }
++ __stop_smp_alternatives_table = .;
++
++ __smp_replacements : { *(__smp_replacements) }
++
+ RODATA
+
+ /* writeable */
+diff -pruN ../pristine-linux-2.6.16-rc3/include/asm-i386/atomic.h
./include/asm-i386/atomic.h
+--- ../pristine-linux-2.6.16-rc3/include/asm-i386/atomic.h 2006-02-15
20:38:57.000000000 +0000
++++ ./include/asm-i386/atomic.h 2006-02-15 20:45:57.000000000 +0000
+@@ -4,18 +4,13 @@
+ #include <linux/config.h>
+ #include <linux/compiler.h>
+ #include <asm/processor.h>
++#include <asm/smp_alt.h>
+
+ /*
+ * Atomic operations that C can't guarantee us. Useful for
+ * resource counting etc..
+ */
+
+-#ifdef CONFIG_SMP
+-#define LOCK "lock ; "
+-#else
+-#define LOCK ""
+-#endif
+-
+ /*
+ * Make sure gcc doesn't try to be clever and move things around
+ * on us. We need to use _exactly_ the address the user gave us,
+diff -pruN ../pristine-linux-2.6.16-rc3/include/asm-i386/bitops.h
./include/asm-i386/bitops.h
+--- ../pristine-linux-2.6.16-rc3/include/asm-i386/bitops.h 2006-02-15
20:38:57.000000000 +0000
++++ ./include/asm-i386/bitops.h 2006-02-15 20:45:57.000000000 +0000
+@@ -7,6 +7,7 @@
+
+ #include <linux/config.h>
+ #include <linux/compiler.h>
++#include <asm/smp_alt.h>
+
+ /*
+ * These have to be done with inline assembly: that way the bit-setting
+@@ -16,12 +17,6 @@
+ * bit 0 is the LSB of addr; bit 32 is the LSB of (addr+1).
+ */
+
+-#ifdef CONFIG_SMP
+-#define LOCK_PREFIX "lock ; "
+-#else
+-#define LOCK_PREFIX ""
+-#endif
+-
+ #define ADDR (*(volatile long *) addr)
+
+ /**
+@@ -41,7 +36,7 @@
+ */
+ static inline void set_bit(int nr, volatile unsigned long * addr)
+ {
+- __asm__ __volatile__( LOCK_PREFIX
++ __asm__ __volatile__( LOCK
+ "btsl %1,%0"
+ :"+m" (ADDR)
+ :"Ir" (nr));
+@@ -76,7 +71,7 @@ static inline void __set_bit(int nr, vol
+ */
+ static inline void clear_bit(int nr, volatile unsigned long * addr)
+ {
+- __asm__ __volatile__( LOCK_PREFIX
++ __asm__ __volatile__( LOCK
+ "btrl %1,%0"
+ :"+m" (ADDR)
+ :"Ir" (nr));
+@@ -121,7 +116,7 @@ static inline void __change_bit(int nr,
+ */
+ static inline void change_bit(int nr, volatile unsigned long * addr)
+ {
+- __asm__ __volatile__( LOCK_PREFIX
++ __asm__ __volatile__( LOCK
+ "btcl %1,%0"
+ :"+m" (ADDR)
+ :"Ir" (nr));
+@@ -140,7 +135,7 @@ static inline int test_and_set_bit(int n
+ {
+ int oldbit;
+
+- __asm__ __volatile__( LOCK_PREFIX
++ __asm__ __volatile__( LOCK
+ "btsl %2,%1\n\tsbbl %0,%0"
+ :"=r" (oldbit),"+m" (ADDR)
+ :"Ir" (nr) : "memory");
+@@ -180,7 +175,7 @@ static inline int test_and_clear_bit(int
+ {
+ int oldbit;
+
+- __asm__ __volatile__( LOCK_PREFIX
++ __asm__ __volatile__( LOCK
+ "btrl %2,%1\n\tsbbl %0,%0"
+ :"=r" (oldbit),"+m" (ADDR)
+ :"Ir" (nr) : "memory");
+@@ -231,7 +226,7 @@ static inline int test_and_change_bit(in
+ {
+ int oldbit;
+
+- __asm__ __volatile__( LOCK_PREFIX
++ __asm__ __volatile__( LOCK
+ "btcl %2,%1\n\tsbbl %0,%0"
+ :"=r" (oldbit),"+m" (ADDR)
+ :"Ir" (nr) : "memory");
+diff -pruN ../pristine-linux-2.6.16-rc3/include/asm-i386/futex.h
./include/asm-i386/futex.h
+--- ../pristine-linux-2.6.16-rc3/include/asm-i386/futex.h 2006-02-15
20:38:57.000000000 +0000
++++ ./include/asm-i386/futex.h 2006-02-15 20:45:57.000000000 +0000
+@@ -28,7 +28,7 @@
+ "1: movl %2, %0\n\
+ movl %0, %3\n" \
+ insn "\n" \
+-"2: " LOCK_PREFIX "cmpxchgl %3, %2\n\
++"2: " LOCK "cmpxchgl %3, %2\n\
+ jnz 1b\n\
+ 3: .section .fixup,\"ax\"\n\
+ 4: mov %5, %1\n\
+@@ -68,7 +68,7 @@ futex_atomic_op_inuser (int encoded_op,
+ #endif
+ switch (op) {
+ case FUTEX_OP_ADD:
+- __futex_atomic_op1(LOCK_PREFIX "xaddl %0, %2", ret,
++ __futex_atomic_op1(LOCK "xaddl %0, %2", ret,
+ oldval, uaddr, oparg);
+ break;
+ case FUTEX_OP_OR:
+diff -pruN ../pristine-linux-2.6.16-rc3/include/asm-i386/rwsem.h
./include/asm-i386/rwsem.h
+--- ../pristine-linux-2.6.16-rc3/include/asm-i386/rwsem.h 2006-01-03
03:21:10.000000000 +0000
++++ ./include/asm-i386/rwsem.h 2006-02-15 20:45:57.000000000 +0000
+@@ -40,6 +40,7 @@
+
+ #include <linux/list.h>
+ #include <linux/spinlock.h>
++#include <asm/smp_alt.h>
+
+ struct rwsem_waiter;
+
+@@ -99,7 +100,7 @@ static inline void __down_read(struct rw
+ {
+ __asm__ __volatile__(
+ "# beginning down_read\n\t"
+-LOCK_PREFIX " incl (%%eax)\n\t" /* adds 0x00000001, returns the old
value */
++LOCK " incl (%%eax)\n\t" /* adds 0x00000001, returns the old
value */
+ " js 2f\n\t" /* jump if we weren't granted the lock */
+ "1:\n\t"
+ LOCK_SECTION_START("")
+@@ -130,7 +131,7 @@ static inline int __down_read_trylock(st
+ " movl %1,%2\n\t"
+ " addl %3,%2\n\t"
+ " jle 2f\n\t"
+-LOCK_PREFIX " cmpxchgl %2,%0\n\t"
++LOCK " cmpxchgl %2,%0\n\t"
+ " jnz 1b\n\t"
+ "2:\n\t"
+ "# ending __down_read_trylock\n\t"
+@@ -150,7 +151,7 @@ static inline void __down_write(struct r
+ tmp = RWSEM_ACTIVE_WRITE_BIAS;
+ __asm__ __volatile__(
+ "# beginning down_write\n\t"
+-LOCK_PREFIX " xadd %%edx,(%%eax)\n\t" /* subtract 0x0000ffff, returns
the old value */
++LOCK " xadd %%edx,(%%eax)\n\t" /* subtract 0x0000ffff, returns
the old value */
+ " testl %%edx,%%edx\n\t" /* was the count 0 before? */
+ " jnz 2f\n\t" /* jump if we weren't granted the lock */
+ "1:\n\t"
+@@ -188,7 +189,7 @@ static inline void __up_read(struct rw_s
+ __s32 tmp = -RWSEM_ACTIVE_READ_BIAS;
+ __asm__ __volatile__(
+ "# beginning __up_read\n\t"
+-LOCK_PREFIX " xadd %%edx,(%%eax)\n\t" /* subtracts 1, returns the old
value */
++LOCK " xadd %%edx,(%%eax)\n\t" /* subtracts 1, returns the old
value */
+ " js 2f\n\t" /* jump if the lock is being waited upon */
+ "1:\n\t"
+ LOCK_SECTION_START("")
+@@ -214,7 +215,7 @@ static inline void __up_write(struct rw_
+ __asm__ __volatile__(
+ "# beginning __up_write\n\t"
+ " movl %2,%%edx\n\t"
+-LOCK_PREFIX " xaddl %%edx,(%%eax)\n\t" /* tries to transition
0xffff0001 -> 0x00000000 */
++LOCK " xaddl %%edx,(%%eax)\n\t" /* tries to transition
0xffff0001 -> 0x00000000 */
+ " jnz 2f\n\t" /* jump if the lock is being waited upon */
+ "1:\n\t"
+ LOCK_SECTION_START("")
+@@ -239,7 +240,7 @@ static inline void __downgrade_write(str
+ {
+ __asm__ __volatile__(
+ "# beginning __downgrade_write\n\t"
+-LOCK_PREFIX " addl %2,(%%eax)\n\t" /* transitions 0xZZZZ0001 ->
0xYYYY0001 */
++LOCK " addl %2,(%%eax)\n\t" /* transitions 0xZZZZ0001 ->
0xYYYY0001 */
+ " js 2f\n\t" /* jump if the lock is being waited upon */
+ "1:\n\t"
+ LOCK_SECTION_START("")
+@@ -263,7 +264,7 @@ LOCK_PREFIX " addl %2,(%%eax)\n\t"
+ static inline void rwsem_atomic_add(int delta, struct rw_semaphore *sem)
+ {
+ __asm__ __volatile__(
+-LOCK_PREFIX "addl %1,%0"
++LOCK "addl %1,%0"
+ : "=m"(sem->count)
+ : "ir"(delta), "m"(sem->count));
+ }
+@@ -276,7 +277,7 @@ static inline int rwsem_atomic_update(in
+ int tmp = delta;
+
+ __asm__ __volatile__(
+-LOCK_PREFIX "xadd %0,(%2)"
++LOCK "xadd %0,(%2)"
+ : "+r"(tmp), "=m"(sem->count)
+ : "r"(sem), "m"(sem->count)
+ : "memory");
+diff -pruN ../pristine-linux-2.6.16-rc3/include/asm-i386/smp_alt.h
./include/asm-i386/smp_alt.h
+--- ../pristine-linux-2.6.16-rc3/include/asm-i386/smp_alt.h 1970-01-01
01:00:00.000000000 +0100
++++ ./include/asm-i386/smp_alt.h 2006-02-15 20:45:57.000000000 +0000
+@@ -0,0 +1,32 @@
++#ifndef __ASM_SMP_ALT_H__
++#define __ASM_SMP_ALT_H__
++
++#include <linux/config.h>
++
++#ifdef CONFIG_SMP
++#if defined(CONFIG_SMP_ALTERNATIVES) && !defined(MODULE)
++#define LOCK \
++ "6677: nop\n" \
++ ".section __smp_alternatives,\"a\"\n" \
++ ".long 6677b\n" \
++ ".long 6678f\n" \
++ ".previous\n" \
++ ".section __smp_replacements,\"a\"\n" \
++ "6678: .byte 1\n" \
++ ".byte 1\n" \
++ ".byte 0\n" \
++ ".byte 1\n" \
++ ".byte -1\n" \
++ "lock\n" \
++ "nop\n" \
++ ".previous\n"
++void prepare_for_smp(void);
++void unprepare_for_smp(void);
++#else
++#define LOCK "lock ; "
++#endif
++#else
++#define LOCK ""
++#endif
++
++#endif /* __ASM_SMP_ALT_H__ */
+diff -pruN ../pristine-linux-2.6.16-rc3/include/asm-i386/spinlock.h
./include/asm-i386/spinlock.h
+--- ../pristine-linux-2.6.16-rc3/include/asm-i386/spinlock.h 2006-01-03
03:21:10.000000000 +0000
++++ ./include/asm-i386/spinlock.h 2006-02-15 20:45:57.000000000 +0000
+@@ -6,6 +6,7 @@
+ #include <asm/page.h>
+ #include <linux/config.h>
+ #include <linux/compiler.h>
++#include <asm/smp_alt.h>
+
+ /*
+ * Your basic SMP spinlocks, allowing only a single CPU anywhere
+@@ -23,7 +24,8 @@
+
+ #define __raw_spin_lock_string \
+ "\n1:\t" \
+- "lock ; decb %0\n\t" \
++ LOCK \
++ "decb %0\n\t" \
+ "jns 3f\n" \
+ "2:\t" \
+ "rep;nop\n\t" \
+@@ -34,7 +36,8 @@
+
+ #define __raw_spin_lock_string_flags \
+ "\n1:\t" \
+- "lock ; decb %0\n\t" \
++ LOCK \
++ "decb %0\n\t" \
+ "jns 4f\n\t" \
+ "2:\t" \
+ "testl $0x200, %1\n\t" \
+@@ -65,10 +68,34 @@ static inline void __raw_spin_lock_flags
+ static inline int __raw_spin_trylock(raw_spinlock_t *lock)
+ {
+ char oldval;
++#ifdef CONFIG_SMP_ALTERNATIVES
+ __asm__ __volatile__(
+- "xchgb %b0,%1"
++ "1:movb %1,%b0\n"
++ "movb $0,%1\n"
++ "2:"
++ ".section __smp_alternatives,\"a\"\n"
++ ".long 1b\n"
++ ".long 3f\n"
++ ".previous\n"
++ ".section __smp_replacements,\"a\"\n"
++ "3: .byte 2b - 1b\n"
++ ".byte 5f-4f\n"
++ ".byte 0\n"
++ ".byte 6f-5f\n"
++ ".byte -1\n"
++ "4: xchgb %b0,%1\n"
++ "5: movb %1,%b0\n"
++ "movb $0,%1\n"
++ "6:\n"
++ ".previous\n"
+ :"=q" (oldval), "=m" (lock->slock)
+ :"0" (0) : "memory");
++#else
++ __asm__ __volatile__(
++ "xchgb %b0,%1\n"
++ :"=q" (oldval), "=m" (lock->slock)
++ :"0" (0) : "memory");
++#endif
+ return oldval > 0;
+ }
+
+@@ -178,12 +205,12 @@ static inline int __raw_write_trylock(ra
+
+ static inline void __raw_read_unlock(raw_rwlock_t *rw)
+ {
+- asm volatile("lock ; incl %0" :"=m" (rw->lock) : : "memory");
++ asm volatile(LOCK "incl %0" :"=m" (rw->lock) : : "memory");
+ }
+
+ static inline void __raw_write_unlock(raw_rwlock_t *rw)
+ {
+- asm volatile("lock ; addl $" RW_LOCK_BIAS_STR ", %0"
++ asm volatile(LOCK "addl $" RW_LOCK_BIAS_STR ", %0"
+ : "=m" (rw->lock) : : "memory");
+ }
+
+diff -pruN ../pristine-linux-2.6.16-rc3/include/asm-i386/system.h
./include/asm-i386/system.h
+--- ../pristine-linux-2.6.16-rc3/include/asm-i386/system.h 2006-02-15
20:38:57.000000000 +0000
++++ ./include/asm-i386/system.h 2006-02-15 20:45:57.000000000 +0000
+@@ -5,7 +5,7 @@
+ #include <linux/kernel.h>
+ #include <asm/segment.h>
+ #include <asm/cpufeature.h>
+-#include <linux/bitops.h> /* for LOCK_PREFIX */
++#include <asm/smp_alt.h>
+
+ #ifdef __KERNEL__
+
+@@ -271,19 +271,19 @@ static inline unsigned long __cmpxchg(vo
+ unsigned long prev;
+ switch (size) {
+ case 1:
+- __asm__ __volatile__(LOCK_PREFIX "cmpxchgb %b1,%2"
++ __asm__ __volatile__(LOCK "cmpxchgb %b1,%2"
+ : "=a"(prev)
+ : "q"(new), "m"(*__xg(ptr)), "0"(old)
+ : "memory");
+ return prev;
+ case 2:
+- __asm__ __volatile__(LOCK_PREFIX "cmpxchgw %w1,%2"
++ __asm__ __volatile__(LOCK "cmpxchgw %w1,%2"
+ : "=a"(prev)
+ : "r"(new), "m"(*__xg(ptr)), "0"(old)
+ : "memory");
+ return prev;
+ case 4:
+- __asm__ __volatile__(LOCK_PREFIX "cmpxchgl %1,%2"
++ __asm__ __volatile__(LOCK "cmpxchgl %1,%2"
+ : "=a"(prev)
+ : "r"(new), "m"(*__xg(ptr)), "0"(old)
+ : "memory");
+@@ -336,7 +336,7 @@ static inline unsigned long long __cmpxc
+ unsigned long long new)
+ {
+ unsigned long long prev;
+- __asm__ __volatile__(LOCK_PREFIX "cmpxchg8b %3"
++ __asm__ __volatile__(LOCK "cmpxchg8b %3"
+ : "=A"(prev)
+ : "b"((unsigned long)new),
+ "c"((unsigned long)(new >> 32)),
+@@ -503,11 +503,55 @@ struct alt_instr {
+ #endif
+
+ #ifdef CONFIG_SMP
++#if defined(CONFIG_SMP_ALTERNATIVES) && !defined(MODULE)
++#define smp_alt_mb(instr) \
++__asm__ __volatile__("6667:\nnop\nnop\nnop\nnop\nnop\nnop\n6668:\n" \
++ ".section __smp_alternatives,\"a\"\n" \
++ ".long 6667b\n" \
++ ".long 6673f\n" \
++ ".previous\n" \
++ ".section __smp_replacements,\"a\"\n" \
++ "6673:.byte 6668b-6667b\n" \
++ ".byte 6670f-6669f\n" \
++ ".byte 6671f-6670f\n" \
++ ".byte 0\n" \
++ ".byte %c0\n" \
++ "6669:lock;addl $0,0(%%esp)\n" \
++ "6670:" instr "\n" \
++ "6671:\n" \
++ ".previous\n" \
++ : \
++ : "i" (X86_FEATURE_XMM2) \
++ : "memory")
++#define smp_rmb() smp_alt_mb("lfence")
++#define smp_mb() smp_alt_mb("mfence")
++#define set_mb(var, value) do { \
++unsigned long __set_mb_temp; \
++__asm__ __volatile__("6667:movl %1, %0\n6668:\n" \
++ ".section __smp_alternatives,\"a\"\n" \
++ ".long 6667b\n" \
++ ".long 6673f\n" \
++ ".previous\n" \
++ ".section __smp_replacements,\"a\"\n" \
++ "6673: .byte 6668b-6667b\n" \
++ ".byte 6670f-6669f\n" \
++ ".byte 0\n" \
++ ".byte 6671f-6670f\n" \
++ ".byte -1\n" \
++ "6669: xchg %1, %0\n" \
++ "6670:movl %1, %0\n" \
++ "6671:\n" \
++ ".previous\n" \
++ : "=m" (var), "=r" (__set_mb_temp) \
++ : "1" (value) \
++ : "memory"); } while (0)
++#else
+ #define smp_mb() mb()
+ #define smp_rmb() rmb()
++#define set_mb(var, value) do { (void) xchg(&var, value); } while (0)
++#endif
+ #define smp_wmb() wmb()
+ #define smp_read_barrier_depends() read_barrier_depends()
+-#define set_mb(var, value) do { (void) xchg(&var, value); } while (0)
+ #else
+ #define smp_mb() barrier()
+ #define smp_rmb() barrier()
diff -r a05e56904e7e -r 1c7145a5bb43
patches/linux-2.6.16-rc3/i386-mach-io-check-nmi.patch
--- a/patches/linux-2.6.16-rc3/i386-mach-io-check-nmi.patch Mon Feb 20
23:01:50 2006
+++ /dev/null Tue Feb 21 11:19:13 2006
@@ -1,45 +0,0 @@
-diff -pruN ../pristine-linux-2.6.16-rc3/arch/i386/kernel/traps.c
./arch/i386/kernel/traps.c
---- ../pristine-linux-2.6.16-rc3/arch/i386/kernel/traps.c 2006-02-15
20:38:51.000000000 +0000
-+++ ./arch/i386/kernel/traps.c 2006-02-15 20:40:43.000000000 +0000
-@@ -567,18 +567,11 @@ static void mem_parity_error(unsigned ch
-
- static void io_check_error(unsigned char reason, struct pt_regs * regs)
- {
-- unsigned long i;
--
- printk(KERN_EMERG "NMI: IOCK error (debug interrupt?)\n");
- show_registers(regs);
-
- /* Re-enable the IOCK line, wait for a few seconds */
-- reason = (reason & 0xf) | 8;
-- outb(reason, 0x61);
-- i = 2000;
-- while (--i) udelay(1000);
-- reason &= ~8;
-- outb(reason, 0x61);
-+ clear_io_check_error(reason);
- }
-
- static void unknown_nmi_error(unsigned char reason, struct pt_regs * regs)
-diff -pruN
../pristine-linux-2.6.16-rc3/include/asm-i386/mach-default/mach_traps.h
./include/asm-i386/mach-default/mach_traps.h
---- ../pristine-linux-2.6.16-rc3/include/asm-i386/mach-default/mach_traps.h
2006-01-03 03:21:10.000000000 +0000
-+++ ./include/asm-i386/mach-default/mach_traps.h 2006-02-15
20:40:43.000000000 +0000
-@@ -15,6 +15,18 @@ static inline void clear_mem_error(unsig
- outb(reason, 0x61);
- }
-
-+static inline void clear_io_check_error(unsigned char reason)
-+{
-+ unsigned long i;
-+
-+ reason = (reason & 0xf) | 8;
-+ outb(reason, 0x61);
-+ i = 2000;
-+ while (--i) udelay(1000);
-+ reason &= ~8;
-+ outb(reason, 0x61);
-+}
-+
- static inline unsigned char get_nmi_reason(void)
- {
- return inb(0x61);
diff -r a05e56904e7e -r 1c7145a5bb43 patches/linux-2.6.16-rc3/net-csum.patch
--- a/patches/linux-2.6.16-rc3/net-csum.patch Mon Feb 20 23:01:50 2006
+++ /dev/null Tue Feb 21 11:19:13 2006
@@ -1,41 +0,0 @@
-diff -pruN
../pristine-linux-2.6.16-rc1-git4/net/ipv4/netfilter/ip_nat_proto_tcp.c
./net/ipv4/netfilter/ip_nat_proto_tcp.c
---- ../pristine-linux-2.6.16-rc1-git4/net/ipv4/netfilter/ip_nat_proto_tcp.c
2006-02-02 17:39:51.000000000 +0000
-+++ ./net/ipv4/netfilter/ip_nat_proto_tcp.c 2006-02-02 17:44:18.000000000
+0000
-@@ -129,10 +129,14 @@ tcp_manip_pkt(struct sk_buff **pskb,
- if (hdrsize < sizeof(*hdr))
- return 1;
-
-- hdr->check = ip_nat_cheat_check(~oldip, newip,
-+ if ((*pskb)->proto_csum_blank) {
-+ hdr->check = ip_nat_cheat_check(oldip, ~newip, hdr->check);
-+ } else {
-+ hdr->check = ip_nat_cheat_check(~oldip, newip,
- ip_nat_cheat_check(oldport ^ 0xFFFF,
- newport,
- hdr->check));
-+ }
- return 1;
- }
-
-diff -pruN
../pristine-linux-2.6.16-rc1-git4/net/ipv4/netfilter/ip_nat_proto_udp.c
./net/ipv4/netfilter/ip_nat_proto_udp.c
---- ../pristine-linux-2.6.16-rc1-git4/net/ipv4/netfilter/ip_nat_proto_udp.c
2006-02-02 17:39:51.000000000 +0000
-+++ ./net/ipv4/netfilter/ip_nat_proto_udp.c 2006-02-02 17:44:18.000000000
+0000
-@@ -113,11 +113,16 @@ udp_manip_pkt(struct sk_buff **pskb,
- newport = tuple->dst.u.udp.port;
- portptr = &hdr->dest;
- }
-- if (hdr->check) /* 0 is a special case meaning no checksum */
-- hdr->check = ip_nat_cheat_check(~oldip, newip,
-+ if (hdr->check) { /* 0 is a special case meaning no checksum */
-+ if ((*pskb)->proto_csum_blank) {
-+ hdr->check = ip_nat_cheat_check(oldip, ~newip,
hdr->check);
-+ } else {
-+ hdr->check = ip_nat_cheat_check(~oldip, newip,
- ip_nat_cheat_check(*portptr ^ 0xFFFF,
- newport,
- hdr->check));
-+ }
-+ }
- *portptr = newport;
- return 1;
- }
diff -r a05e56904e7e -r 1c7145a5bb43 patches/linux-2.6.16-rc3/pmd-shared.patch
--- a/patches/linux-2.6.16-rc3/pmd-shared.patch Mon Feb 20 23:01:50 2006
+++ /dev/null Tue Feb 21 11:19:13 2006
@@ -1,111 +0,0 @@
-diff -pruN ../pristine-linux-2.6.16-rc1-git4/arch/i386/mm/pageattr.c
./arch/i386/mm/pageattr.c
---- ../pristine-linux-2.6.16-rc1-git4/arch/i386/mm/pageattr.c 2006-02-02
17:39:29.000000000 +0000
-+++ ./arch/i386/mm/pageattr.c 2006-02-02 17:45:14.000000000 +0000
-@@ -78,7 +78,7 @@ static void set_pmd_pte(pte_t *kpte, uns
- unsigned long flags;
-
- set_pte_atomic(kpte, pte); /* change init_mm */
-- if (PTRS_PER_PMD > 1)
-+ if (HAVE_SHARED_KERNEL_PMD)
- return;
-
- spin_lock_irqsave(&pgd_lock, flags);
-diff -pruN ../pristine-linux-2.6.16-rc1-git4/arch/i386/mm/pgtable.c
./arch/i386/mm/pgtable.c
---- ../pristine-linux-2.6.16-rc1-git4/arch/i386/mm/pgtable.c 2006-01-03
03:21:10.000000000 +0000
-+++ ./arch/i386/mm/pgtable.c 2006-02-02 17:45:14.000000000 +0000
-@@ -215,9 +215,10 @@ void pgd_ctor(void *pgd, kmem_cache_t *c
- spin_lock_irqsave(&pgd_lock, flags);
- }
-
-- clone_pgd_range((pgd_t *)pgd + USER_PTRS_PER_PGD,
-- swapper_pg_dir + USER_PTRS_PER_PGD,
-- KERNEL_PGD_PTRS);
-+ if (PTRS_PER_PMD == 1 || HAVE_SHARED_KERNEL_PMD)
-+ clone_pgd_range((pgd_t *)pgd + USER_PTRS_PER_PGD,
-+ swapper_pg_dir + USER_PTRS_PER_PGD,
-+ KERNEL_PGD_PTRS);
- if (PTRS_PER_PMD > 1)
- return;
-
-@@ -249,6 +250,30 @@ pgd_t *pgd_alloc(struct mm_struct *mm)
- goto out_oom;
- set_pgd(&pgd[i], __pgd(1 + __pa(pmd)));
- }
-+
-+ if (!HAVE_SHARED_KERNEL_PMD) {
-+ unsigned long flags;
-+
-+ for (i = USER_PTRS_PER_PGD; i < PTRS_PER_PGD; i++) {
-+ pmd_t *pmd = kmem_cache_alloc(pmd_cache, GFP_KERNEL);
-+ if (!pmd)
-+ goto out_oom;
-+ set_pgd(&pgd[USER_PTRS_PER_PGD], __pgd(1 + __pa(pmd)));
-+ }
-+
-+ spin_lock_irqsave(&pgd_lock, flags);
-+ for (i = USER_PTRS_PER_PGD; i < PTRS_PER_PGD; i++) {
-+ unsigned long v = (unsigned long)i << PGDIR_SHIFT;
-+ pgd_t *kpgd = pgd_offset_k(v);
-+ pud_t *kpud = pud_offset(kpgd, v);
-+ pmd_t *kpmd = pmd_offset(kpud, v);
-+ pmd_t *pmd = (void *)__va(pgd_val(pgd[i])-1);
-+ memcpy(pmd, kpmd, PAGE_SIZE);
-+ }
-+ pgd_list_add(pgd);
-+ spin_unlock_irqrestore(&pgd_lock, flags);
-+ }
-+
- return pgd;
-
- out_oom:
-@@ -263,9 +288,23 @@ void pgd_free(pgd_t *pgd)
- int i;
-
- /* in the PAE case user pgd entries are overwritten before usage */
-- if (PTRS_PER_PMD > 1)
-- for (i = 0; i < USER_PTRS_PER_PGD; ++i)
-- kmem_cache_free(pmd_cache, (void
*)__va(pgd_val(pgd[i])-1));
-+ if (PTRS_PER_PMD > 1) {
-+ for (i = 0; i < USER_PTRS_PER_PGD; ++i) {
-+ pmd_t *pmd = (void *)__va(pgd_val(pgd[i])-1);
-+ kmem_cache_free(pmd_cache, pmd);
-+ }
-+ if (!HAVE_SHARED_KERNEL_PMD) {
-+ unsigned long flags;
-+ spin_lock_irqsave(&pgd_lock, flags);
-+ pgd_list_del(pgd);
-+ spin_unlock_irqrestore(&pgd_lock, flags);
-+ for (i = USER_PTRS_PER_PGD; i < PTRS_PER_PGD; i++) {
-+ pmd_t *pmd = (void *)__va(pgd_val(pgd[i])-1);
-+ memset(pmd, 0, PTRS_PER_PMD*sizeof(pmd_t));
-+ kmem_cache_free(pmd_cache, pmd);
-+ }
-+ }
-+ }
- /* in the non-PAE case, free_pgtables() clears user pgd entries */
- kmem_cache_free(pgd_cache, pgd);
- }
-diff -pruN
../pristine-linux-2.6.16-rc1-git4/include/asm-i386/pgtable-2level-defs.h
./include/asm-i386/pgtable-2level-defs.h
---- ../pristine-linux-2.6.16-rc1-git4/include/asm-i386/pgtable-2level-defs.h
2006-01-03 03:21:10.000000000 +0000
-+++ ./include/asm-i386/pgtable-2level-defs.h 2006-02-02 17:45:14.000000000
+0000
-@@ -1,6 +1,8 @@
- #ifndef _I386_PGTABLE_2LEVEL_DEFS_H
- #define _I386_PGTABLE_2LEVEL_DEFS_H
-
-+#define HAVE_SHARED_KERNEL_PMD 0
-+
- /*
- * traditional i386 two-level paging structure:
- */
-diff -pruN
../pristine-linux-2.6.16-rc1-git4/include/asm-i386/pgtable-3level-defs.h
./include/asm-i386/pgtable-3level-defs.h
---- ../pristine-linux-2.6.16-rc1-git4/include/asm-i386/pgtable-3level-defs.h
2006-01-03 03:21:10.000000000 +0000
-+++ ./include/asm-i386/pgtable-3level-defs.h 2006-02-02 17:45:14.000000000
+0000
-@@ -1,6 +1,8 @@
- #ifndef _I386_PGTABLE_3LEVEL_DEFS_H
- #define _I386_PGTABLE_3LEVEL_DEFS_H
-
-+#define HAVE_SHARED_KERNEL_PMD 1
-+
- /*
- * PGDIR_SHIFT determines what a top-level page table entry can map
- */
diff -r a05e56904e7e -r 1c7145a5bb43 patches/linux-2.6.16-rc3/smp-alts.patch
--- a/patches/linux-2.6.16-rc3/smp-alts.patch Mon Feb 20 23:01:50 2006
+++ /dev/null Tue Feb 21 11:19:13 2006
@@ -1,591 +0,0 @@
-diff -pruN ../pristine-linux-2.6.16-rc3/arch/i386/Kconfig ./arch/i386/Kconfig
---- ../pristine-linux-2.6.16-rc3/arch/i386/Kconfig 2006-02-15
20:38:51.000000000 +0000
-+++ ./arch/i386/Kconfig 2006-02-15 20:45:57.000000000 +0000
-@@ -202,6 +202,19 @@ config SMP
-
- If you don't know what to do here, say N.
-
-+config SMP_ALTERNATIVES
-+ bool "SMP alternatives support (EXPERIMENTAL)"
-+ depends on SMP && EXPERIMENTAL
-+ help
-+ Try to reduce the overhead of running an SMP kernel on a uniprocessor
-+ host slightly by replacing certain key instruction sequences
-+ according to whether we currently have more than one CPU available.
-+ This should provide a noticeable boost to performance when
-+ running SMP kernels on UP machines, and have negligible impact
-+ when running on an true SMP host.
-+
-+ If unsure, say N.
-+
- config NR_CPUS
- int "Maximum number of CPUs (2-255)"
- range 2 255
-diff -pruN ../pristine-linux-2.6.16-rc3/arch/i386/kernel/Makefile
./arch/i386/kernel/Makefile
---- ../pristine-linux-2.6.16-rc3/arch/i386/kernel/Makefile 2006-02-15
20:38:51.000000000 +0000
-+++ ./arch/i386/kernel/Makefile 2006-02-15 20:45:57.000000000 +0000
-@@ -37,6 +37,7 @@ obj-$(CONFIG_EFI) += efi.o efi_stub.o
- obj-$(CONFIG_DOUBLEFAULT) += doublefault.o
- obj-$(CONFIG_VM86) += vm86.o
- obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
-+obj-$(CONFIG_SMP_ALTERNATIVES) += smpalts.o
-
- EXTRA_AFLAGS := -traditional
-
-diff -pruN ../pristine-linux-2.6.16-rc3/arch/i386/kernel/smpalts.c
./arch/i386/kernel/smpalts.c
---- ../pristine-linux-2.6.16-rc3/arch/i386/kernel/smpalts.c 1970-01-01
01:00:00.000000000 +0100
-+++ ./arch/i386/kernel/smpalts.c 2006-02-15 20:45:57.000000000 +0000
-@@ -0,0 +1,85 @@
-+#include <linux/kernel.h>
-+#include <asm/system.h>
-+#include <asm/smp_alt.h>
-+#include <asm/processor.h>
-+#include <asm/string.h>
-+
-+struct smp_replacement_record {
-+ unsigned char targ_size;
-+ unsigned char smp1_size;
-+ unsigned char smp2_size;
-+ unsigned char up_size;
-+ unsigned char feature;
-+ unsigned char data[0];
-+};
-+
-+struct smp_alternative_record {
-+ void *targ_start;
-+ struct smp_replacement_record *repl;
-+};
-+
-+extern struct smp_alternative_record __start_smp_alternatives_table,
-+ __stop_smp_alternatives_table;
-+extern unsigned long __init_begin, __init_end;
-+
-+void prepare_for_smp(void)
-+{
-+ struct smp_alternative_record *r;
-+ printk(KERN_INFO "Enabling SMP...\n");
-+ for (r = &__start_smp_alternatives_table;
-+ r != &__stop_smp_alternatives_table;
-+ r++) {
-+ BUG_ON(r->repl->targ_size < r->repl->smp1_size);
-+ BUG_ON(r->repl->targ_size < r->repl->smp2_size);
-+ BUG_ON(r->repl->targ_size < r->repl->up_size);
-+ if (system_state == SYSTEM_RUNNING &&
-+ r->targ_start >= (void *)&__init_begin &&
-+ r->targ_start < (void *)&__init_end)
-+ continue;
-+ if (r->repl->feature != (unsigned char)-1 &&
-+ boot_cpu_has(r->repl->feature)) {
-+ memcpy(r->targ_start,
-+ r->repl->data + r->repl->smp1_size,
-+ r->repl->smp2_size);
-+ memset(r->targ_start + r->repl->smp2_size,
-+ 0x90,
-+ r->repl->targ_size - r->repl->smp2_size);
-+ } else {
-+ memcpy(r->targ_start,
-+ r->repl->data,
-+ r->repl->smp1_size);
-+ memset(r->targ_start + r->repl->smp1_size,
-+ 0x90,
-+ r->repl->targ_size - r->repl->smp1_size);
-+ }
-+ }
-+ /* Paranoia */
-+ asm volatile ("jmp 1f\n1:");
-+ mb();
-+}
-+
-+void unprepare_for_smp(void)
-+{
-+ struct smp_alternative_record *r;
-+ printk(KERN_INFO "Disabling SMP...\n");
-+ for (r = &__start_smp_alternatives_table;
-+ r != &__stop_smp_alternatives_table;
-+ r++) {
-+ BUG_ON(r->repl->targ_size < r->repl->smp1_size);
-+ BUG_ON(r->repl->targ_size < r->repl->smp2_size);
-+ BUG_ON(r->repl->targ_size < r->repl->up_size);
-+ if (system_state == SYSTEM_RUNNING &&
-+ r->targ_start >= (void *)&__init_begin &&
-+ r->targ_start < (void *)&__init_end)
-+ continue;
-+ memcpy(r->targ_start,
-+ r->repl->data + r->repl->smp1_size + r->repl->smp2_size,
-+ r->repl->up_size);
-+ memset(r->targ_start + r->repl->up_size,
-+ 0x90,
-+ r->repl->targ_size - r->repl->up_size);
-+ }
-+ /* Paranoia */
-+ asm volatile ("jmp 1f\n1:");
-+ mb();
-+}
-diff -pruN ../pristine-linux-2.6.16-rc3/arch/i386/kernel/smpboot.c
./arch/i386/kernel/smpboot.c
---- ../pristine-linux-2.6.16-rc3/arch/i386/kernel/smpboot.c 2006-02-15
20:38:51.000000000 +0000
-+++ ./arch/i386/kernel/smpboot.c 2006-02-15 20:45:57.000000000 +0000
-@@ -1214,6 +1214,11 @@ static void __init smp_boot_cpus(unsigne
- if (max_cpus <= cpucount+1)
- continue;
-
-+#ifdef CONFIG_SMP_ALTERNATIVES
-+ if (kicked == 1)
-+ prepare_for_smp();
-+#endif
-+
- if (((cpu = alloc_cpu_id()) <= 0) || do_boot_cpu(apicid, cpu))
- printk("CPU #%d not responding - cannot use it.\n",
- apicid);
-@@ -1392,6 +1397,11 @@ int __devinit __cpu_up(unsigned int cpu)
- return -EIO;
- }
-
-+#ifdef CONFIG_SMP_ALTERNATIVES
-+ if (num_online_cpus() == 1)
-+ prepare_for_smp();
-+#endif
-+
- local_irq_enable();
- per_cpu(cpu_state, cpu) = CPU_UP_PREPARE;
- /* Unleash the CPU! */
-diff -pruN ../pristine-linux-2.6.16-rc3/arch/i386/kernel/vmlinux.lds.S
./arch/i386/kernel/vmlinux.lds.S
---- ../pristine-linux-2.6.16-rc3/arch/i386/kernel/vmlinux.lds.S
2006-01-03 03:21:10.000000000 +0000
-+++ ./arch/i386/kernel/vmlinux.lds.S 2006-02-15 20:45:57.000000000 +0000
-@@ -34,6 +34,13 @@ SECTIONS
- __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { *(__ex_table) }
- __stop___ex_table = .;
-
-+ . = ALIGN(16);
-+ __start_smp_alternatives_table = .;
-+ __smp_alternatives : { *(__smp_alternatives) }
-+ __stop_smp_alternatives_table = .;
-+
-+ __smp_replacements : { *(__smp_replacements) }
-+
- RODATA
-
- /* writeable */
-diff -pruN ../pristine-linux-2.6.16-rc3/include/asm-i386/atomic.h
./include/asm-i386/atomic.h
---- ../pristine-linux-2.6.16-rc3/include/asm-i386/atomic.h 2006-02-15
20:38:57.000000000 +0000
-+++ ./include/asm-i386/atomic.h 2006-02-15 20:45:57.000000000 +0000
-@@ -4,18 +4,13 @@
- #include <linux/config.h>
- #include <linux/compiler.h>
- #include <asm/processor.h>
-+#include <asm/smp_alt.h>
-
- /*
- * Atomic operations that C can't guarantee us. Useful for
- * resource counting etc..
- */
-
--#ifdef CONFIG_SMP
--#define LOCK "lock ; "
--#else
--#define LOCK ""
--#endif
--
- /*
- * Make sure gcc doesn't try to be clever and move things around
- * on us. We need to use _exactly_ the address the user gave us,
-diff -pruN ../pristine-linux-2.6.16-rc3/include/asm-i386/bitops.h
./include/asm-i386/bitops.h
---- ../pristine-linux-2.6.16-rc3/include/asm-i386/bitops.h 2006-02-15
20:38:57.000000000 +0000
-+++ ./include/asm-i386/bitops.h 2006-02-15 20:45:57.000000000 +0000
-@@ -7,6 +7,7 @@
-
- #include <linux/config.h>
- #include <linux/compiler.h>
-+#include <asm/smp_alt.h>
-
- /*
- * These have to be done with inline assembly: that way the bit-setting
-@@ -16,12 +17,6 @@
- * bit 0 is the LSB of addr; bit 32 is the LSB of (addr+1).
- */
-
--#ifdef CONFIG_SMP
--#define LOCK_PREFIX "lock ; "
--#else
--#define LOCK_PREFIX ""
--#endif
--
- #define ADDR (*(volatile long *) addr)
-
- /**
-@@ -41,7 +36,7 @@
- */
- static inline void set_bit(int nr, volatile unsigned long * addr)
- {
-- __asm__ __volatile__( LOCK_PREFIX
-+ __asm__ __volatile__( LOCK
- "btsl %1,%0"
- :"+m" (ADDR)
- :"Ir" (nr));
-@@ -76,7 +71,7 @@ static inline void __set_bit(int nr, vol
- */
- static inline void clear_bit(int nr, volatile unsigned long * addr)
- {
-- __asm__ __volatile__( LOCK_PREFIX
-+ __asm__ __volatile__( LOCK
- "btrl %1,%0"
- :"+m" (ADDR)
- :"Ir" (nr));
-@@ -121,7 +116,7 @@ static inline void __change_bit(int nr,
- */
- static inline void change_bit(int nr, volatile unsigned long * addr)
- {
-- __asm__ __volatile__( LOCK_PREFIX
-+ __asm__ __volatile__( LOCK
- "btcl %1,%0"
- :"+m" (ADDR)
- :"Ir" (nr));
-@@ -140,7 +135,7 @@ static inline int test_and_set_bit(int n
- {
- int oldbit;
-
-- __asm__ __volatile__( LOCK_PREFIX
-+ __asm__ __volatile__( LOCK
- "btsl %2,%1\n\tsbbl %0,%0"
- :"=r" (oldbit),"+m" (ADDR)
- :"Ir" (nr) : "memory");
-@@ -180,7 +175,7 @@ static inline int test_and_clear_bit(int
- {
- int oldbit;
-
-- __asm__ __volatile__( LOCK_PREFIX
-+ __asm__ __volatile__( LOCK
- "btrl %2,%1\n\tsbbl %0,%0"
- :"=r" (oldbit),"+m" (ADDR)
- :"Ir" (nr) : "memory");
-@@ -231,7 +226,7 @@ static inline int test_and_change_bit(in
- {
- int oldbit;
-
-- __asm__ __volatile__( LOCK_PREFIX
-+ __asm__ __volatile__( LOCK
- "btcl %2,%1\n\tsbbl %0,%0"
- :"=r" (oldbit),"+m" (ADDR)
- :"Ir" (nr) : "memory");
-diff -pruN ../pristine-linux-2.6.16-rc3/include/asm-i386/futex.h
./include/asm-i386/futex.h
---- ../pristine-linux-2.6.16-rc3/include/asm-i386/futex.h 2006-02-15
20:38:57.000000000 +0000
-+++ ./include/asm-i386/futex.h 2006-02-15 20:45:57.000000000 +0000
-@@ -28,7 +28,7 @@
- "1: movl %2, %0\n\
- movl %0, %3\n" \
- insn "\n" \
--"2: " LOCK_PREFIX "cmpxchgl %3, %2\n\
-+"2: " LOCK "cmpxchgl %3, %2\n\
- jnz 1b\n\
- 3: .section .fixup,\"ax\"\n\
- 4: mov %5, %1\n\
-@@ -68,7 +68,7 @@ futex_atomic_op_inuser (int encoded_op,
- #endif
- switch (op) {
- case FUTEX_OP_ADD:
-- __futex_atomic_op1(LOCK_PREFIX "xaddl %0, %2", ret,
-+ __futex_atomic_op1(LOCK "xaddl %0, %2", ret,
- oldval, uaddr, oparg);
- break;
- case FUTEX_OP_OR:
-diff -pruN ../pristine-linux-2.6.16-rc3/include/asm-i386/rwsem.h
./include/asm-i386/rwsem.h
---- ../pristine-linux-2.6.16-rc3/include/asm-i386/rwsem.h 2006-01-03
03:21:10.000000000 +0000
-+++ ./include/asm-i386/rwsem.h 2006-02-15 20:45:57.000000000 +0000
-@@ -40,6 +40,7 @@
-
- #include <linux/list.h>
- #include <linux/spinlock.h>
-+#include <asm/smp_alt.h>
-
- struct rwsem_waiter;
-
-@@ -99,7 +100,7 @@ static inline void __down_read(struct rw
- {
- __asm__ __volatile__(
- "# beginning down_read\n\t"
--LOCK_PREFIX " incl (%%eax)\n\t" /* adds 0x00000001, returns the old
value */
-+LOCK " incl (%%eax)\n\t" /* adds 0x00000001, returns the old
value */
- " js 2f\n\t" /* jump if we weren't granted the lock */
- "1:\n\t"
- LOCK_SECTION_START("")
-@@ -130,7 +131,7 @@ static inline int __down_read_trylock(st
- " movl %1,%2\n\t"
- " addl %3,%2\n\t"
- " jle 2f\n\t"
--LOCK_PREFIX " cmpxchgl %2,%0\n\t"
-+LOCK " cmpxchgl %2,%0\n\t"
- " jnz 1b\n\t"
- "2:\n\t"
- "# ending __down_read_trylock\n\t"
-@@ -150,7 +151,7 @@ static inline void __down_write(struct r
- tmp = RWSEM_ACTIVE_WRITE_BIAS;
- __asm__ __volatile__(
- "# beginning down_write\n\t"
--LOCK_PREFIX " xadd %%edx,(%%eax)\n\t" /* subtract 0x0000ffff, returns
the old value */
-+LOCK " xadd %%edx,(%%eax)\n\t" /* subtract 0x0000ffff, returns
the old value */
- " testl %%edx,%%edx\n\t" /* was the count 0 before? */
- " jnz 2f\n\t" /* jump if we weren't granted the lock */
- "1:\n\t"
-@@ -188,7 +189,7 @@ static inline void __up_read(struct rw_s
- __s32 tmp = -RWSEM_ACTIVE_READ_BIAS;
- __asm__ __volatile__(
- "# beginning __up_read\n\t"
--LOCK_PREFIX " xadd %%edx,(%%eax)\n\t" /* subtracts 1, returns the old
value */
-+LOCK " xadd %%edx,(%%eax)\n\t" /* subtracts 1, returns the old
value */
- " js 2f\n\t" /* jump if the lock is being waited upon */
- "1:\n\t"
- LOCK_SECTION_START("")
-@@ -214,7 +215,7 @@ static inline void __up_write(struct rw_
- __asm__ __volatile__(
- "# beginning __up_write\n\t"
- " movl %2,%%edx\n\t"
--LOCK_PREFIX " xaddl %%edx,(%%eax)\n\t" /* tries to transition
0xffff0001 -> 0x00000000 */
-+LOCK " xaddl %%edx,(%%eax)\n\t" /* tries to transition
0xffff0001 -> 0x00000000 */
- " jnz 2f\n\t" /* jump if the lock is being waited upon */
- "1:\n\t"
- LOCK_SECTION_START("")
-@@ -239,7 +240,7 @@ static inline void __downgrade_write(str
- {
- __asm__ __volatile__(
- "# beginning __downgrade_write\n\t"
--LOCK_PREFIX " addl %2,(%%eax)\n\t" /* transitions 0xZZZZ0001 ->
0xYYYY0001 */
-+LOCK " addl %2,(%%eax)\n\t" /* transitions 0xZZZZ0001 ->
0xYYYY0001 */
- " js 2f\n\t" /* jump if the lock is being waited upon */
- "1:\n\t"
- LOCK_SECTION_START("")
-@@ -263,7 +264,7 @@ LOCK_PREFIX " addl %2,(%%eax)\n\t"
- static inline void rwsem_atomic_add(int delta, struct rw_semaphore *sem)
- {
- __asm__ __volatile__(
--LOCK_PREFIX "addl %1,%0"
-+LOCK "addl %1,%0"
- : "=m"(sem->count)
- : "ir"(delta), "m"(sem->count));
- }
-@@ -276,7 +277,7 @@ static inline int rwsem_atomic_update(in
- int tmp = delta;
-
- __asm__ __volatile__(
--LOCK_PREFIX "xadd %0,(%2)"
-+LOCK "xadd %0,(%2)"
- : "+r"(tmp), "=m"(sem->count)
- : "r"(sem), "m"(sem->count)
- : "memory");
-diff -pruN ../pristine-linux-2.6.16-rc3/include/asm-i386/smp_alt.h
./include/asm-i386/smp_alt.h
---- ../pristine-linux-2.6.16-rc3/include/asm-i386/smp_alt.h 1970-01-01
01:00:00.000000000 +0100
-+++ ./include/asm-i386/smp_alt.h 2006-02-15 20:45:57.000000000 +0000
-@@ -0,0 +1,32 @@
-+#ifndef __ASM_SMP_ALT_H__
-+#define __ASM_SMP_ALT_H__
-+
-+#include <linux/config.h>
-+
-+#ifdef CONFIG_SMP
-+#if defined(CONFIG_SMP_ALTERNATIVES) && !defined(MODULE)
-+#define LOCK \
-+ "6677: nop\n" \
-+ ".section __smp_alternatives,\"a\"\n" \
-+ ".long 6677b\n" \
-+ ".long 6678f\n" \
-+ ".previous\n" \
-+ ".section __smp_replacements,\"a\"\n" \
-+ "6678: .byte 1\n" \
-+ ".byte 1\n" \
-+ ".byte 0\n" \
-+ ".byte 1\n" \
-+ ".byte -1\n" \
-+ "lock\n" \
-+ "nop\n" \
-+ ".previous\n"
-+void prepare_for_smp(void);
-+void unprepare_for_smp(void);
-+#else
-+#define LOCK "lock ; "
-+#endif
-+#else
-+#define LOCK ""
-+#endif
-+
-+#endif /* __ASM_SMP_ALT_H__ */
-diff -pruN ../pristine-linux-2.6.16-rc3/include/asm-i386/spinlock.h
./include/asm-i386/spinlock.h
---- ../pristine-linux-2.6.16-rc3/include/asm-i386/spinlock.h 2006-01-03
03:21:10.000000000 +0000
-+++ ./include/asm-i386/spinlock.h 2006-02-15 20:45:57.000000000 +0000
-@@ -6,6 +6,7 @@
- #include <asm/page.h>
- #include <linux/config.h>
- #include <linux/compiler.h>
-+#include <asm/smp_alt.h>
-
- /*
- * Your basic SMP spinlocks, allowing only a single CPU anywhere
-@@ -23,7 +24,8 @@
-
- #define __raw_spin_lock_string \
- "\n1:\t" \
-- "lock ; decb %0\n\t" \
-+ LOCK \
-+ "decb %0\n\t" \
- "jns 3f\n" \
- "2:\t" \
- "rep;nop\n\t" \
-@@ -34,7 +36,8 @@
-
- #define __raw_spin_lock_string_flags \
- "\n1:\t" \
-- "lock ; decb %0\n\t" \
-+ LOCK \
-+ "decb %0\n\t" \
- "jns 4f\n\t" \
- "2:\t" \
- "testl $0x200, %1\n\t" \
-@@ -65,10 +68,34 @@ static inline void __raw_spin_lock_flags
- static inline int __raw_spin_trylock(raw_spinlock_t *lock)
- {
- char oldval;
-+#ifdef CONFIG_SMP_ALTERNATIVES
- __asm__ __volatile__(
-- "xchgb %b0,%1"
-+ "1:movb %1,%b0\n"
-+ "movb $0,%1\n"
-+ "2:"
-+ ".section __smp_alternatives,\"a\"\n"
-+ ".long 1b\n"
-+ ".long 3f\n"
-+ ".previous\n"
-+ ".section __smp_replacements,\"a\"\n"
-+ "3: .byte 2b - 1b\n"
-+ ".byte 5f-4f\n"
-+ ".byte 0\n"
-+ ".byte 6f-5f\n"
-+ ".byte -1\n"
-+ "4: xchgb %b0,%1\n"
-+ "5: movb %1,%b0\n"
-+ "movb $0,%1\n"
-+ "6:\n"
-+ ".previous\n"
- :"=q" (oldval), "=m" (lock->slock)
- :"0" (0) : "memory");
-+#else
-+ __asm__ __volatile__(
-+ "xchgb %b0,%1\n"
-+ :"=q" (oldval), "=m" (lock->slock)
-+ :"0" (0) : "memory");
-+#endif
- return oldval > 0;
- }
-
-@@ -178,12 +205,12 @@ static inline int __raw_write_trylock(ra
-
- static inline void __raw_read_unlock(raw_rwlock_t *rw)
- {
-- asm volatile("lock ; incl %0" :"=m" (rw->lock) : : "memory");
-+ asm volatile(LOCK "incl %0" :"=m" (rw->lock) : : "memory");
- }
-
- static inline void __raw_write_unlock(raw_rwlock_t *rw)
- {
-- asm volatile("lock ; addl $" RW_LOCK_BIAS_STR ", %0"
-+ asm volatile(LOCK "addl $" RW_LOCK_BIAS_STR ", %0"
- : "=m" (rw->lock) : : "memory");
- }
-
-diff -pruN ../pristine-linux-2.6.16-rc3/include/asm-i386/system.h
./include/asm-i386/system.h
---- ../pristine-linux-2.6.16-rc3/include/asm-i386/system.h 2006-02-15
20:38:57.000000000 +0000
-+++ ./include/asm-i386/system.h 2006-02-15 20:45:57.000000000 +0000
-@@ -5,7 +5,7 @@
- #include <linux/kernel.h>
- #include <asm/segment.h>
- #include <asm/cpufeature.h>
--#include <linux/bitops.h> /* for LOCK_PREFIX */
-+#include <asm/smp_alt.h>
-
- #ifdef __KERNEL__
-
-@@ -271,19 +271,19 @@ static inline unsigned long __cmpxchg(vo
- unsigned long prev;
- switch (size) {
- case 1:
-- __asm__ __volatile__(LOCK_PREFIX "cmpxchgb %b1,%2"
-+ __asm__ __volatile__(LOCK "cmpxchgb %b1,%2"
- : "=a"(prev)
- : "q"(new), "m"(*__xg(ptr)), "0"(old)
- : "memory");
- return prev;
- case 2:
-- __asm__ __volatile__(LOCK_PREFIX "cmpxchgw %w1,%2"
-+ __asm__ __volatile__(LOCK "cmpxchgw %w1,%2"
- : "=a"(prev)
- : "r"(new), "m"(*__xg(ptr)), "0"(old)
- : "memory");
- return prev;
- case 4:
-- __asm__ __volatile__(LOCK_PREFIX "cmpxchgl %1,%2"
-+ __asm__ __volatile__(LOCK "cmpxchgl %1,%2"
- : "=a"(prev)
- : "r"(new), "m"(*__xg(ptr)), "0"(old)
- : "memory");
-@@ -336,7 +336,7 @@ static inline unsigned long long __cmpxc
- unsigned long long new)
- {
- unsigned long long prev;
-- __asm__ __volatile__(LOCK_PREFIX "cmpxchg8b %3"
-+ __asm__ __volatile__(LOCK "cmpxchg8b %3"
- : "=A"(prev)
- : "b"((unsigned long)new),
- "c"((unsigned long)(new >> 32)),
-@@ -503,11 +503,55 @@ struct alt_instr {
- #endif
-
- #ifdef CONFIG_SMP
-+#if defined(CONFIG_SMP_ALTERNATIVES) && !defined(MODULE)
-+#define smp_alt_mb(instr) \
-+__asm__ __volatile__("6667:\nnop\nnop\nnop\nnop\nnop\nnop\n6668:\n" \
-+ ".section __smp_alternatives,\"a\"\n" \
-+ ".long 6667b\n" \
-+ ".long 6673f\n" \
-+ ".previous\n" \
-+ ".section __smp_replacements,\"a\"\n" \
-+ "6673:.byte 6668b-6667b\n" \
-+ ".byte 6670f-6669f\n" \
-+ ".byte 6671f-6670f\n" \
-+ ".byte 0\n" \
-+ ".byte %c0\n" \
-+ "6669:lock;addl $0,0(%%esp)\n" \
-+ "6670:" instr "\n" \
-+ "6671:\n" \
-+ ".previous\n" \
-+ : \
-+ : "i" (X86_FEATURE_XMM2) \
-+ : "memory")
-+#define smp_rmb() smp_alt_mb("lfence")
-+#define smp_mb() smp_alt_mb("mfence")
-+#define set_mb(var, value) do { \
-+unsigned long __set_mb_temp; \
-+__asm__ __volatile__("6667:movl %1, %0\n6668:\n" \
-+ ".section __smp_alternatives,\"a\"\n" \
-+ ".long 6667b\n" \
-+ ".long 6673f\n" \
-+ ".previous\n" \
-+ ".section __smp_replacements,\"a\"\n" \
-+ "6673: .byte 6668b-6667b\n" \
-+ ".byte 6670f-6669f\n" \
-+ ".byte 0\n" \
-+ ".byte 6671f-6670f\n" \
-+ ".byte -1\n" \
-+ "6669: xchg %1, %0\n" \
-+ "6670:movl %1, %0\n" \
-+ "6671:\n" \
-+ ".previous\n" \
-+ : "=m" (var), "=r" (__set_mb_temp) \
-+ : "1" (value) \
-+ : "memory"); } while (0)
-+#else
- #define smp_mb() mb()
- #define smp_rmb() rmb()
-+#define set_mb(var, value) do { (void) xchg(&var, value); } while (0)
-+#endif
- #define smp_wmb() wmb()
- #define smp_read_barrier_depends() read_barrier_depends()
--#define set_mb(var, value) do { (void) xchg(&var, value); } while (0)
- #else
- #define smp_mb() barrier()
- #define smp_rmb() barrier()
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