powerpc/perf: Drop MMCRA from thread_struct

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>

diff --git a/arch/powerpc/include/asm/processor.h b/arch/powerpc/include/asm/processor.h
index 9fe1129..3f19df3 100644 (file)
--- a/arch/powerpc/include/asm/processor.h
+++ b/arch/powerpc/include/asm/processor.h
@@ -289,7 +289,6 @@ struct thread_struct {
        unsigned long   sier;
        unsigned long   mmcr0;
        unsigned long   mmcr2;
-       unsigned long   mmcra;
 #endif
 };
 

diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c
index dc684b1..c7e8afc 100644 (file)
--- a/arch/powerpc/kernel/asm-offsets.c
+++ b/arch/powerpc/kernel/asm-offsets.c
@@ -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));