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Commit 1bac3b38 authored by Andi Kleen's avatar Andi Kleen Committed by Andi Kleen
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[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>
parent 92715e28

arch/i386/kernel/vmlinux.lds.S

+1 −0
Original line number Diff line number Diff line
@@ -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 */

arch/x86_64/kernel/vmlinux.lds.S

+1 −0
Original line number Diff line number Diff line
@@ -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 */