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| author | Paul E. McKenney <paulmck@kernel.org> | 2019-09-18 10:10:31 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2019-10-30 08:34:53 -0700 |
| commit | 36b5dae64513b7ce3a0e0f6cb469e0f74bacad45 (patch) | |
| tree | 6be97b54c29948238cace6b8f20fb08ce5b9da69 | |
| parent | b8889c9c89a2655a231dfed93cc9bdca0930ea67 (diff) | |
| download | linux-36b5dae64513b7ce3a0e0f6cb469e0f74bacad45.tar.bz2 | |
rcu: Suppress levelspread uninitialized messages
New tools bring new warnings, and with v5.3 comes:
kernel/rcu/srcutree.c: warning: 'levelspread[<U aa0>]' may be used uninitialized in this function [-Wuninitialized]: => 121:34
This commit suppresses this warning by initializing the full array
to INT_MIN, which will result in failures should any out-of-bounds
references appear.
Reported-by: Michael Ellerman <mpe@ellerman.id.au>
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
| -rw-r--r-- | kernel/rcu/rcu.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/rcu/rcu.h b/kernel/rcu/rcu.h index 8fd4f82c9b3d..b64c707f6065 100644 --- a/kernel/rcu/rcu.h +++ b/kernel/rcu/rcu.h @@ -299,6 +299,8 @@ static inline void rcu_init_levelspread(int *levelspread, const int *levelcnt) { int i; + for (i = 0; i < RCU_NUM_LVLS; i++) + levelspread[i] = INT_MIN; if (rcu_fanout_exact) { levelspread[rcu_num_lvls - 1] = rcu_fanout_leaf; for (i = rcu_num_lvls - 2; i >= 0; i--) |