Commit-ID: 019e579d395733d14097c2d29c8c43226dad1617 Gitweb: http://git.kernel.org/tip/019e579d395733d14097c2d29c8c43226dad1617 Author: Josh Poimboeuf <jpoimboe@xxxxxxxxxx> AuthorDate: Wed, 24 Aug 2016 11:50:14 -0500 Committer: Ingo Molnar <mingo@xxxxxxxxxx> CommitDate: Thu, 8 Sep 2016 08:58:40 +0200 perf/x86: Check perf_callchain_store() error Add a check to perf_callchain_kernel() so that it returns early if the callchain entry array is already full. Signed-off-by: Josh Poimboeuf <jpoimboe@xxxxxxxxxx> Cc: Andy Lutomirski <luto@xxxxxxxxxxxxxx> Cc: Brian Gerst <brgerst@xxxxxxxxx> Cc: Byungchul Park <byungchul.park@xxxxxxx> Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx> Cc: Kees Cook <keescook@xxxxxxxxxxxx> Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> Cc: Nilay Vaish <nilayvaish@xxxxxxxxx> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> Cc: Steven Rostedt <rostedt@xxxxxxxxxxx> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Link: http://lkml.kernel.org/r/dce6d60bab08be2600efd90021d9b85620646161.1472057064.git.jpoimboe@xxxxxxxxxx Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx> --- arch/x86/events/core.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/x86/events/core.c b/arch/x86/events/core.c index d0efb5c..c1319ac 100644 --- a/arch/x86/events/core.c +++ b/arch/x86/events/core.c @@ -2277,7 +2277,8 @@ perf_callchain_kernel(struct perf_callchain_entry_ctx *entry, struct pt_regs *re return; } - perf_callchain_store(entry, regs->ip); + if (perf_callchain_store(entry, regs->ip)) + return; dump_trace(NULL, regs, NULL, 0, &backtrace_ops, entry); } -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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