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| author | Michael Ellerman <mpe@ellerman.id.au> | 2016-07-26 15:29:29 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2016-09-13 17:37:03 +1000 |
| commit | 27510235dd2bb1ab01d27b01f0b6180eb47aa003 (patch) | |
| tree | bd4e7d172384a91f77a7902534da9955392b6d2d /arch/powerpc | |
| parent | f0f558b131db0e793fd90aac5d93f694362973d2 (diff) | |
| download | linux-27510235dd2bb1ab01d27b01f0b6180eb47aa003.tar.bz2 | |
powerpc/64: Correct comment on LOAD_HANDLER()
The comment for LOAD_HANDLER() was wrong. The part about kdump has not
been true since 1f6a93e4c35e ("powerpc: Make it possible to move the
interrupt handlers away from the kernel").
Describe how it currently works, and combine the two separate comments
into one.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Reviewed-by: Nick Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/include/asm/exception-64s.h | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/arch/powerpc/include/asm/exception-64s.h b/arch/powerpc/include/asm/exception-64s.h index bed66e5743b3..1a9afded909f 100644 --- a/arch/powerpc/include/asm/exception-64s.h +++ b/arch/powerpc/include/asm/exception-64s.h @@ -84,12 +84,12 @@ /* * We're short on space and time in the exception prolog, so we can't - * use the normal SET_REG_IMMEDIATE macro. Normally we just need the - * low halfword of the address, but for Kdump we need the whole low - * word. + * use the normal LOAD_REG_IMMEDIATE macro to load the address of label. + * Instead we get the base of the kernel from paca->kernelbase and or in the low + * part of label. This requires that the label be within 64KB of kernelbase, and + * that kernelbase be 64K aligned. */ #define LOAD_HANDLER(reg, label) \ - /* Handlers must be within 64K of kbase, which must be 64k aligned */ \ ori reg,reg,(label)-_stext; /* virt addr of handler ... */ /* Exception register prefixes */ |