Commit 787db610 authored by Andi Kleen's avatar Andi Kleen Committed by Chris Wright

[PATCH] x86: Work around gcc 4.2 over aggressive optimizer

The new PDA code uses a dummy _proxy_pda variable to describe
memory references to the PDA. It is never referenced
in inline assembly, but exists as input/output arguments.
gcc 4.2 in some cases can CSE references to this which causes
unresolved symbols.  Define it to zero to avoid this.
Signed-off-by: default avatarAndi Kleen <ak@suse.de>
Signed-off-by: default avatarChris Wright <chrisw@sous-sol.org>
parent 808c407e
...@@ -13,6 +13,7 @@ OUTPUT_FORMAT("elf32-i386", "elf32-i386", "elf32-i386") ...@@ -13,6 +13,7 @@ OUTPUT_FORMAT("elf32-i386", "elf32-i386", "elf32-i386")
OUTPUT_ARCH(i386) OUTPUT_ARCH(i386)
ENTRY(phys_startup_32) ENTRY(phys_startup_32)
jiffies = jiffies_64; jiffies = jiffies_64;
_proxy_pda = 0;
PHDRS { PHDRS {
text PT_LOAD FLAGS(5); /* R_E */ text PT_LOAD FLAGS(5); /* R_E */
......
...@@ -13,6 +13,7 @@ OUTPUT_FORMAT("elf64-x86-64", "elf64-x86-64", "elf64-x86-64") ...@@ -13,6 +13,7 @@ OUTPUT_FORMAT("elf64-x86-64", "elf64-x86-64", "elf64-x86-64")
OUTPUT_ARCH(i386:x86-64) OUTPUT_ARCH(i386:x86-64)
ENTRY(phys_startup_64) ENTRY(phys_startup_64)
jiffies_64 = jiffies; jiffies_64 = jiffies;
_proxy_pda = 0;
PHDRS { PHDRS {
text PT_LOAD FLAGS(5); /* R_E */ text PT_LOAD FLAGS(5); /* R_E */
data PT_LOAD FLAGS(7); /* RWE */ data PT_LOAD FLAGS(7); /* RWE */
......
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