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| author | Grant Likely <grant.likely@secretlab.ca> | 2011-02-12 23:53:34 -0700 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2011-02-12 23:53:34 -0700 |
| commit | c170093d31bd4e3bc51881cc0f123beeca7872c9 (patch) | |
| tree | d93cd280d525dd339f33be010c75b7fd0bacd690 /arch/powerpc/kernel/entry_32.S | |
| parent | 557218e2d662574bc58d840fe116c7fd8d57aed8 (diff) | |
| parent | 78bba987bc025a7263248501b453476e77b93331 (diff) | |
| download | talos-op-linux-c170093d31bd4e3bc51881cc0f123beeca7872c9.tar.gz talos-op-linux-c170093d31bd4e3bc51881cc0f123beeca7872c9.zip | |
Merge branch 'devicetree/merge' into spi/merge
Diffstat (limited to 'arch/powerpc/kernel/entry_32.S')
| -rw-r--r-- | arch/powerpc/kernel/entry_32.S | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S index c22dc1ec1c94..56212bc0ab08 100644 --- a/arch/powerpc/kernel/entry_32.S +++ b/arch/powerpc/kernel/entry_32.S @@ -880,7 +880,18 @@ END_MMU_FTR_SECTION_IFSET(MMU_FTR_TYPE_47x) */ andi. r10,r9,MSR_EE beq 1f + /* + * Since the ftrace irqsoff latency trace checks CALLER_ADDR1, + * which is the stack frame here, we need to force a stack frame + * in case we came from user space. + */ + stwu r1,-32(r1) + mflr r0 + stw r0,4(r1) + stwu r1,-32(r1) bl trace_hardirqs_on + lwz r1,0(r1) + lwz r1,0(r1) lwz r9,_MSR(r1) 1: #endif /* CONFIG_TRACE_IRQFLAGS */ |
