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| author | Michael Ellerman <mpe@ellerman.id.au> | 2014-07-15 15:15:37 +0400 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2014-07-28 08:11:24 +0400 |
| commit | a1d711c53f413db330da57bfaf53255a5d62447e (patch) | |
| tree | 5fb5460193de3a9ad81cace15ac3ba679afebf0a /arch/powerpc/include/asm/exception-64s.h | |
| parent | 144beb2f53894283e0a8a4e6ef32d42b17fc34fd (diff) | |
| download | linux-a1d711c53f413db330da57bfaf53255a5d62447e.tar.xz | |
powerpc: Document register clobbering in EXCEPTION_COMMON()
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/include/asm/exception-64s.h')
| -rw-r--r-- | arch/powerpc/include/asm/exception-64s.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/exception-64s.h b/arch/powerpc/include/asm/exception-64s.h index 8f35cd7d59cc..066c15cd2837 100644 --- a/arch/powerpc/include/asm/exception-64s.h +++ b/arch/powerpc/include/asm/exception-64s.h @@ -532,6 +532,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_CTRL) .globl label##_common; \ label##_common: \ EXCEPTION_PROLOG_COMMON(trap, PACA_EXGEN); \ + /* Volatile regs are potentially clobbered here */ \ additions; \ addi r3,r1,STACK_FRAME_OVERHEAD; \ bl hdlr; \ |