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authorJoel Stanley <joel@jms.id.au>2014-07-08 06:38:20 (GMT)
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2014-07-11 02:55:07 (GMT)
commitf73128f4f680e8be68cda831f2710214559583cb (patch)
treef8a4f75ad45cfd8d6efe97bf7d17c6ae1554fee5 /arch/powerpc/perf/core-book3s.c
parentc733cf83bbd2b0978456822cdac8c726085dcc14 (diff)
downloadlinux-f73128f4f680e8be68cda831f2710214559583cb.tar.xz
powerpc/kvm: Remove redundant save of SIER AND MMCR2
These two registers are already saved in the block above. Aside from being unnecessary, by the time we get down to the second save location r8 no longer contains MMCR2, so we are clobbering the saved value with PMC5. MMCR2 primarily consists of counter freeze bits. So restoring the value of PMC5 into MMCR2 will most likely have the effect of freezing counters. Fixes: 72cde5a88d37 ("KVM: PPC: Book3S HV: Save/restore host PMU registers that are new in POWER8") Cc: stable@vger.kernel.org Signed-off-by: Joel Stanley <joel@jms.id.au> Acked-by: Michael Ellerman <mpe@ellerman.id.au> Acked-by: Paul Mackerras <paulus@samba.org> Reviewed-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/perf/core-book3s.c')
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