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| author | Andi Kleen <ak@suse.de> | 2006-12-09 21:33:36 +0100 |
|---|---|---|
| committer | Andi Kleen <andi@basil.nowhere.org> | 2006-12-09 21:33:36 +0100 |
| commit | 1bac3b383a93a4a920ffc57441eb133c78567fbd (patch) | |
| tree | d9d767a3334271e3cde7116957f5eaa365b973be | |
| parent | 92715e282be7c7488f892703c8d39b08976a833b (diff) | |
| download | linux-3.10-1bac3b383a93a4a920ffc57441eb133c78567fbd.tar.gz linux-3.10-1bac3b383a93a4a920ffc57441eb133c78567fbd.tar.bz2 linux-3.10-1bac3b383a93a4a920ffc57441eb133c78567fbd.zip | |
[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>
| -rw-r--r-- | arch/i386/kernel/vmlinux.lds.S | 1 | ||||
| -rw-r--r-- | arch/x86_64/kernel/vmlinux.lds.S | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/arch/i386/kernel/vmlinux.lds.S b/arch/i386/kernel/vmlinux.lds.S index 16d3c7133ad..a53c8b1854b 100644 --- a/arch/i386/kernel/vmlinux.lds.S +++ b/arch/i386/kernel/vmlinux.lds.S @@ -26,6 +26,7 @@ OUTPUT_FORMAT("elf32-i386", "elf32-i386", "elf32-i386") OUTPUT_ARCH(i386) ENTRY(phys_startup_32) jiffies = jiffies_64; +_proxy_pda = 0; PHDRS { text PT_LOAD FLAGS(5); /* R_E */ diff --git a/arch/x86_64/kernel/vmlinux.lds.S b/arch/x86_64/kernel/vmlinux.lds.S index 6c417788c54..514be5dd230 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 */ |