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powerpc/perf: Drop MMCRA from thread_struct

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In commit 59affcd "Context switch more PMU related SPRs" I added more
PMU SPRs to thread_struct, later modified in commit b11ae95. To add
insult to injury it turns out we don't need to switch MMCRA as it's
only user readable, and the value is recomputed by the PMU code.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Michael Ellerman 2013-06-28 18:15:15 +10:00 committed by Benjamin Herrenschmidt
parent 4ea355b536
commit 2ac138ca21
2 changed files with 0 additions and 2 deletions
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1
arch/powerpc/include/asm/processor.h
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@ -289,7 +289,6 @@ struct thread_struct {
unsigned long sier;
unsigned long mmcr0;
unsigned long mmcr2;
unsigned long mmcra;
#endif
};

1
arch/powerpc/kernel/asm-offsets.c
View File

@ -132,7 +132,6 @@ int main(void)
DEFINE(THREAD_SIER, offsetof(struct thread_struct, sier));
DEFINE(THREAD_MMCR0, offsetof(struct thread_struct, mmcr0));
DEFINE(THREAD_MMCR2, offsetof(struct thread_struct, mmcr2));
DEFINE(THREAD_MMCRA, offsetof(struct thread_struct, mmcra));
#endif
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
DEFINE(PACATMSCRATCH, offsetof(struct paca_struct, tm_scratch));