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

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

Fixes: e6878835ac ("powerpc/perf: Sample only if SIAR-Valid bit is set in P7+")
Signed-off-by: Kajol Jain <kjain@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210818171556.36912-2-kjain@linux.ibm.com
This commit is contained in:
Kajol Jain 2021-08-18 22:45:55 +05:30 committed by Michael Ellerman
parent b1643084d1
commit cc90c6742e
1 changed files with 0 additions and 2 deletions
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2
arch/powerpc/perf/core-book3s.c
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@ -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;
}