powerpc/perf: Use stack siar instead of mfspr

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Minor optimization in the 'perf_instruction_pointer' function code by
making use of stack siar instead of mfspr.

Fixes: 75382aa72f ("powerpc/perf: Move code to select SIAR or pt_regs into perf_read_regs")
Signed-off-by: Kajol Jain <kjain@linux.ibm.com>
Tested-by: Nageswara R Sastry <rnsastry@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210818171556.36912-1-kjain@linux.ibm.com

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Kajol Jain 2021-08-18 22:45:54 +05:30 • committed by Michael Ellerman

parent 9401f4e46c

commit b1643084d1

1 changed files with 1 additions and 1 deletions

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arch/powerpc/perf/core-book3s.c

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