[PATCH 1/6] perf/x86: check perf_callchain_store() error

[Josh Poimboeuf]

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 <jpoim...@redhat.com>
---
 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 18a1acf..dcaa887 100644
--- a/arch/x86/events/core.c
+++ b/arch/x86/events/core.c
@@ -2297,7 +2297,8 @@ 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);
 }
-- 
2.7.4