From b1643084d164cea0c107a39bcdf0119fc52619af Mon Sep 17 00:00:00 2001 From: Kajol Jain Date: Wed, 18 Aug 2021 22:45:54 +0530 Subject: 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 Tested-by: Nageswara R Sastry Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20210818171556.36912-1-kjain@linux.ibm.com --- arch/powerpc/perf/core-book3s.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/powerpc') 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 -- cgit v1.2.3-59-g8ed1b