* [PATCH] tracing: make ftrace_branch_data counters atomic
@ 2026-05-05 13:25 Khaled Saleh
0 siblings, 0 replies; only message in thread
From: Khaled Saleh @ 2026-05-05 13:25 UTC (permalink / raw)
To: Chris Li; +Cc: linux-sparse, linux-kernel, khaled.saleh.req
Replace unsigned long counters with local_t and update all
increments and reads to use local_inc() and local_read().
This fixes potential race conditions in branch statistics
updates across CPUs.
Signed-off-by: Khaled Saleh <khaled.saleh.req@gmail.com>
---
include/linux/compiler.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/include/linux/compiler.h b/include/linux/compiler.h
index 1a506c54c060..39b89544adc7 100644
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -66,8 +66,8 @@ void ftrace_likely_update(struct ftrace_likely_data *f, int val,
.line = __LINE__, \
}; \
(cond) ? \
- (local_inc(&__if_trace.miss_hit[1]),1) :\
- (local_inc(&__if_trace.miss_hit[0]),0); \
+ (local_inc(&__if_trace.miss_hit[1]), 1) :\
+ (local_inc(&__if_trace.miss_hit[0]), 0); \
})
#endif /* CONFIG_PROFILE_ALL_BRANCHES */
--
2.34.1
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