[Xen-devel] [PATCH] Use pfn_to_page in initial memory mapping

[Glauber de Oliveira Costa <gcosta@xxxxxxxxxx>]

the mem_map structure is only visible in the flatmem memory model. We
should be a little bit more agnostic on this.

A patch follows.
-- 
Glauber de Oliveira Costa
Red Hat Inc.
"Free as in Freedom"

# HG changeset patch
# User Glauber de Oliveira Costa <gcosta@xxxxxxxxxx>
# Node ID 9a9e51d2ca56a15f9c9e8bb23658a715defe2e97
# Parent  20204db0891b0b7c10959822e3283656c3600500
[LINUX] Use pfn_to_page instead of relying in memory assumptions

This makes usage agnostic on the memory model being used.

Signed-off-by: Glauber de Oliveira Costa <gcosta@xxxxxxxxxx>

diff -r 20204db0891b -r 9a9e51d2ca56 
linux-2.6-xen-sparse/arch/i386/mm/init-xen.c
--- a/linux-2.6-xen-sparse/arch/i386/mm/init-xen.c      Thu Nov  2 18:52:04 2006
+++ b/linux-2.6-xen-sparse/arch/i386/mm/init-xen.c      Tue Nov  7 04:41:14 2006
@@ -663,8 +663,8 @@
        totalram_pages += free_all_bootmem();
        /* XEN: init and count low-mem pages outside initial allocation. */
        for (pfn = xen_start_info->nr_pages; pfn < max_low_pfn; pfn++) {
-               ClearPageReserved(&mem_map[pfn]);
-               set_page_count(&mem_map[pfn], 1);
+               ClearPageReserved(pfn_to_page(pfn));
+               set_page_count(pfn_to_page(pfn), 1);
                totalram_pages++;
        }
 
diff -r 20204db0891b -r 9a9e51d2ca56 
linux-2.6-xen-sparse/arch/x86_64/mm/init-xen.c
--- a/linux-2.6-xen-sparse/arch/x86_64/mm/init-xen.c    Thu Nov  2 18:52:04 2006
+++ b/linux-2.6-xen-sparse/arch/x86_64/mm/init-xen.c    Tue Nov  7 04:41:14 2006
@@ -913,8 +913,8 @@
 #endif
        /* XEN: init and count pages outside initial allocation. */
        for (pfn = xen_start_info->nr_pages; pfn < max_pfn; pfn++) {
-               ClearPageReserved(&mem_map[pfn]);
-               set_page_count(&mem_map[pfn], 1);
+               ClearPageReserved(pfn_to_page(pfn));
+               set_page_count(pfn_to_page(pfn), 1);
                totalram_pages++;
        }
        reservedpages = end_pfn - totalram_pages - e820_hole_size(0, end_pfn);

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