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| author |   Kajol Jain <kjain@linux.ibm.com> | 2021-08-18 22:45:54 +0530 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2021-08-25 22:38:18 +1000 |
| commit | b1643084d164cea0c107a39bcdf0119fc52619af (patch) | |
| tree | 365582b2d37a2d3f9a38a2cd0fafe5983f9f95f6 /arch/powerpc | |
| parent | powerpc: Use lwarx/ldarx directly instead of PPC_LWARX/LDARX macros (diff) | |
| download | linux-dev-b1643084d164cea0c107a39bcdf0119fc52619af.tar.xz linux-dev-b1643084d164cea0c107a39bcdf0119fc52619af.zip | |
powerpc/perf: Use stack siar instead of mfspr
Minor optimization in the 'perf_instruction_pointer' function code by
making use of stack siar instead of mfspr.
Fixes: 75382aa72f06 ("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
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/perf/core-book3s.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/perf/core-book3s.c b/arch/powerpc/perf/core-book3s.c index 91203ed9d0ff..3a782a35100d 100644 --- a/arch/powerpc/perf/core-book3s.c +++ b/arch/powerpc/perf/core-book3s.c @@ -2269,7 +2269,7 @@ unsigned long perf_instruction_pointer(struct pt_regs *regs) else return regs->nip; } else if (use_siar && siar_valid(regs)) - return mfspr(SPRN_SIAR) + perf_ip_adjust(regs); + return siar + perf_ip_adjust(regs); else if (use_siar) return 0; // no valid instruction pointer else |