[Xen-changelog] Enable xenstored optimisations.

[Xen patchbot -unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User kaf24@xxxxxxxxxxxxxxxxxxxx
# Node ID 158d23cbd2e605eb5acd969ccfde76da58161d99
# Parent  ef1cd772967698f38ebc5a351fb5c125fb565acb
Enable xenstored optimisations.
Signed-off-by: Keir Fraser <keir@xxxxxxxxxxxxx>

diff -r ef1cd7729676 -r 158d23cbd2e6 tools/xenstore/Makefile
--- a/tools/xenstore/Makefile   Tue Sep  6 15:31:34 2005
+++ b/tools/xenstore/Makefile   Tue Sep  6 15:47:23 2005
@@ -12,7 +12,7 @@
 # Make gcc generate dependencies.
 BASECFLAGS += -Wp,-MD,.$(@F).d
 PROG_DEP = .*.d
-#BASECFLAGS+= -O3 $(PROFILE)
+BASECFLAGS+= -O3 $(PROFILE)
 #BASECFLAGS+= -I$(XEN_ROOT)/tools
 BASECFLAGS+= -I$(XEN_ROOT)/tools/libxc
 BASECFLAGS+= -I$(XEN_ROOT)/xen/include/public
diff -r ef1cd7729676 -r 158d23cbd2e6 tools/xenstore/xenstored_core.c
--- a/tools/xenstore/xenstored_core.c   Tue Sep  6 15:31:34 2005
+++ b/tools/xenstore/xenstored_core.c   Tue Sep  6 15:47:23 2005
@@ -1304,8 +1304,12 @@
 
 static void consider_message(struct connection *conn)
 {
-       struct buffered_data *in = NULL;
-       enum xsd_sockmsg_type type = conn->in->hdr.msg.type;
+       /*
+        * 'volatile' qualifier prevents register allocation which fixes:
+        *   warning: variable 'xxx' might be clobbered by 'longjmp' or 'vfork'
+        */
+       struct buffered_data *volatile in = NULL;
+       enum xsd_sockmsg_type volatile type = conn->in->hdr.msg.type;
        jmp_buf talloc_fail;
 
        assert(conn->state == OK);
@@ -1443,7 +1447,11 @@
 
 struct connection *new_connection(connwritefn_t *write, connreadfn_t *read)
 {
-       struct connection *new;
+       /*
+        * 'volatile' qualifier prevents register allocation which fixes:
+        *   warning: variable 'xxx' might be clobbered by 'longjmp' or 'vfork'
+        */
+       struct connection *volatile new;
        jmp_buf talloc_fail;
 
        new = talloc(talloc_autofree_context(), struct connection);

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