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| author | Andi Kleen <ak@suse.de> | 2006-12-09 20:33:36 (GMT) |
|---|---|---|
| committer | Andi Kleen <andi@basil.nowhere.org> | 2006-12-09 20:33:36 (GMT) |
| commit | 1bac3b383a93a4a920ffc57441eb133c78567fbd (patch) | |
| tree | d9d767a3334271e3cde7116957f5eaa365b973be /arch/x86_64 | |
| parent | 92715e282be7c7488f892703c8d39b08976a833b (diff) | |
| download | linux-1bac3b383a93a4a920ffc57441eb133c78567fbd.tar.xz | |
[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.S | 1 |
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 6c417788..514be5d 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 */ |