Commit cc90c674 authored by Kajol Jain's avatar Kajol Jain Committed by Michael Ellerman
Browse files

powerpc/perf: Drop the case of returning 0 as instruction pointer 



Drop the case of returning 0 as instruction pointer since kernel
never executes at 0 and userspace almost never does either.

Fixes: e6878835 ("powerpc/perf: Sample only if SIAR-Valid bit is set in P7+")
Signed-off-by: default avatarKajol Jain <kjain@linux.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210818171556.36912-2-kjain@linux.ibm.com
parent b1643084

arch/powerpc/perf/core-book3s.c

+0 −2
Original line number Diff line number Diff line
@@ -2270,8 +2270,6 @@ unsigned long perf_instruction_pointer(struct pt_regs *regs) 
			return regs->nip;

	} else if (use_siar && siar_valid(regs))

		return siar + perf_ip_adjust(regs);

	else if (use_siar)

		return 0;		// no valid instruction pointer

	else

		return regs->nip;

}