With KCSAN enabled, prandom_u32() may be called from any context,
including idle CPUs.
Therefore, switch to using trace_prandom_u32_rcuidle(), to avoid various
issues due to recursion and lockdep warnings when KCSAN and tracing is
enabled.
Fixes: 94c7eb54c4b8 ("random32: add a tracepoint for prandom_u32()")
Link: https://lkml.kernel.org/r/[email protected]
Suggested-by: Steven Rostedt <[email protected]>
Signed-off-by: Marco Elver <[email protected]>
Cc: Eric Dumazet <[email protected]>
Cc: Peter Zijlstra <[email protected]>
---
lib/random32.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/lib/random32.c b/lib/random32.c
index 932345323af0..1c5607a411d4 100644
--- a/lib/random32.c
+++ b/lib/random32.c
@@ -83,7 +83,7 @@ u32 prandom_u32(void)
u32 res;
res = prandom_u32_state(state);
- trace_prandom_u32(res);
+ trace_prandom_u32_rcuidle(res);
put_cpu_var(net_rand_state);
return res;
--
2.28.0.297.g1956fa8f8d-goog
