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authorAndi Kleen <ak@suse.de>2006-12-09 21:33:36 +0100
committerAndi Kleen <andi@basil.nowhere.org>2006-12-09 21:33:36 +0100
commit1bac3b383a93a4a920ffc57441eb133c78567fbd (patch)
treed9d767a3334271e3cde7116957f5eaa365b973be /arch/x86_64
parent92715e282be7c7488f892703c8d39b08976a833b (diff)
downloadlinux-linaro-stable-1bac3b383a93a4a920ffc57441eb133c78567fbd.tar.gz
[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: Andi Kleen <ak@suse.de>
Diffstat (limited to 'arch/x86_64')
-rw-r--r--arch/x86_64/kernel/vmlinux.lds.S1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86_64/kernel/vmlinux.lds.S b/arch/x86_64/kernel/vmlinux.lds.S
index 6c417788c54b..514be5dd2303 100644
--- a/arch/x86_64/kernel/vmlinux.lds.S
+++ b/arch/x86_64/kernel/vmlinux.lds.S
@@ -13,6 +13,7 @@ OUTPUT_FORMAT("elf64-x86-64", "elf64-x86-64", "elf64-x86-64")
OUTPUT_ARCH(i386:x86-64)
ENTRY(phys_startup_64)
jiffies_64 = jiffies;
+_proxy_pda = 0;
PHDRS {
text PT_LOAD FLAGS(5); /* R_E */
data PT_LOAD FLAGS(7); /* RWE */