diff options
| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2012-01-05 13:56:44 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2012-01-05 13:56:44 +0100 |
| commit | 4045407fd7740642b18bc802e8bab064e79a61e5 (patch) | |
| tree | 9412a38886bfad562bc5897c6e4c23bb88703204 /arch/powerpc/kernel/entry_32.S | |
| parent | Merge branch 'restart-cleanup' into restart (diff) | |
| parent | Merge branch 'for-russell' of git://hansjkoch.de/git/linux-tcc into HEAD (diff) | |
| download | linux-4045407fd7740642b18bc802e8bab064e79a61e5.tar.xz linux-4045407fd7740642b18bc802e8bab064e79a61e5.zip | |
Merge branch 'restart-cleanup' into restart
Conflicts:
arch/arm/kernel/setup.c
Diffstat (limited to 'arch/powerpc/kernel/entry_32.S')
| -rw-r--r-- | arch/powerpc/kernel/entry_32.S | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S index 56212bc0ab08..4f80cf1ce77b 100644 --- a/arch/powerpc/kernel/entry_32.S +++ b/arch/powerpc/kernel/entry_32.S @@ -215,7 +215,22 @@ reenable_mmu: /* re-enable mmu so we can */ stw r9,8(r1) stw r11,12(r1) stw r3,ORIG_GPR3(r1) + /* + * The trace_hardirqs_off will use CALLER_ADDR0 and CALLER_ADDR1. + * If from user mode there is only one stack frame on the stack, and + * accessing CALLER_ADDR1 will cause oops. So we need create a dummy + * stack frame to make trace_hardirqs_off happy. + */ + andi. r12,r12,MSR_PR + beq 11f + stwu r1,-16(r1) + bl trace_hardirqs_off + addi r1,r1,16 + b 12f + +11: bl trace_hardirqs_off +12: lwz r0,GPR0(r1) lwz r3,ORIG_GPR3(r1) lwz r4,GPR4(r1) |