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authorAndi Kleen <ak@suse.de>2006-12-09 15:33:36 -0500
committerAndi Kleen <andi@basil.nowhere.org>2006-12-09 15:33:36 -0500
commit1bac3b383a93a4a920ffc57441eb133c78567fbd (patch)
treed9d767a3334271e3cde7116957f5eaa365b973be
parent92715e282be7c7488f892703c8d39b08976a833b (diff)
[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.S1
-rw-r--r--arch/x86_64/kernel/vmlinux.lds.S1
2 files changed, 2 insertions, 0 deletions
diff --git a/arch/i386/kernel/vmlinux.lds.S b/arch/i386/kernel/vmlinux.lds.S
index 16d3c7133ad7..a53c8b1854b5 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")
26OUTPUT_ARCH(i386) 26OUTPUT_ARCH(i386)
27ENTRY(phys_startup_32) 27ENTRY(phys_startup_32)
28jiffies = jiffies_64; 28jiffies = jiffies_64;
29_proxy_pda = 0;
29 30
30PHDRS { 31PHDRS {
31 text PT_LOAD FLAGS(5); /* R_E */ 32 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 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")
13OUTPUT_ARCH(i386:x86-64) 13OUTPUT_ARCH(i386:x86-64)
14ENTRY(phys_startup_64) 14ENTRY(phys_startup_64)
15jiffies_64 = jiffies; 15jiffies_64 = jiffies;
16_proxy_pda = 0;
16PHDRS { 17PHDRS {
17 text PT_LOAD FLAGS(5); /* R_E */ 18 text PT_LOAD FLAGS(5); /* R_E */
18 data PT_LOAD FLAGS(7); /* RWE */ 19 data PT_LOAD FLAGS(7); /* RWE */