Messages in this thread Patch in this message | | | Date | Sat, 28 Sep 2013 10:57:48 -0700 | From | tip-bot for Ingo Molnar <> | Subject | [tip:perf/urgent] perf/x86: Fix PMU detection printout when no PMU is detected |
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Commit-ID: 8a3da6c7d0031fcb6a0d17f9c7a68b0e01f52855 Gitweb: http://git.kernel.org/tip/8a3da6c7d0031fcb6a0d17f9c7a68b0e01f52855 Author: Ingo Molnar <mingo@kernel.org> AuthorDate: Sat, 28 Sep 2013 15:48:48 +0200 Committer: Ingo Molnar <mingo@kernel.org> CommitDate: Sat, 28 Sep 2013 15:48:48 +0200
perf/x86: Fix PMU detection printout when no PMU is detected
Ran into this cryptic PMU bootup log recently:
[ 0.124047] Performance Events: [ 0.125000] smpboot: ...
Turns out we print this if no PMU is detected. Fall back to the right condition so that the following is printed:
[ 0.122381] Performance Events: no PMU driver, software events only.
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Link: http://lkml.kernel.org/n/tip-u2fwaUffakjp0qkpRfqljgsn@git.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org> --- arch/x86/kernel/cpu/perf_event.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c index a9c606b..897783b 100644 --- a/arch/x86/kernel/cpu/perf_event.c +++ b/arch/x86/kernel/cpu/perf_event.c @@ -1506,7 +1506,7 @@ static int __init init_hw_perf_events(void) err = amd_pmu_init(); break; default: - return 0; + err = -ENOTSUPP; } if (err != 0) { pr_cont("no PMU driver, software events only.\n");
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