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Date: Fri, 1 Aug 2014 14:33:00 +0200 From: Jiri Olsa <jolsa@...nel.org> To: linux-kernel@...r.kernel.org Cc: Jiri Olsa <jolsa@...nel.org>, Arnaldo Carvalho de Melo <acme@...nel.org>, Corey Ashford <cjashfor@...ux.vnet.ibm.com>, Frederic Weisbecker <fweisbec@...il.com>, Mark Rutland <mark.rutland@....com>, Paul Mackerras <paulus@...ba.org>, Peter Zijlstra <peterz@...radead.org> Subject: [PATCH 1/3] perf: Do not allow to create kernel events without handler Force kernel events to specify the handler, because there's no use for kernel perf event without it. Cc: Arnaldo Carvalho de Melo <acme@...nel.org> Cc: Corey Ashford <cjashfor@...ux.vnet.ibm.com> Cc: Frederic Weisbecker <fweisbec@...il.com> Cc: Mark Rutland <mark.rutland@....com> Cc: Paul Mackerras <paulus@...ba.org> Cc: Peter Zijlstra <peterz@...radead.org> Signed-off-by: Jiri Olsa <jolsa@...nel.org> --- kernel/events/core.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/kernel/events/core.c b/kernel/events/core.c index 1cf24b3e42ec..75c4ff8d1590 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -7355,6 +7355,9 @@ perf_event_create_kernel_counter(struct perf_event_attr *attr, int cpu, struct perf_event *event; int err; + if (WARN_ON(!overflow_handler)) + return NULL; + /* * Get the target context (task or percpu): */ -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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