path: root/kernel/rcu
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authorPaul E. McKenney <paulmck@kernel.org>2019-09-18 10:10:31 -0700
committerPaul E. McKenney <paulmck@kernel.org>2019-10-30 08:34:53 -0700
commit36b5dae64513b7ce3a0e0f6cb469e0f74bacad45 (patch)
tree6be97b54c29948238cace6b8f20fb08ce5b9da69 /kernel/rcu
parentrcu: Fix uninitialized variable in nocb_gp_wait() (diff)
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>
Diffstat (limited to 'kernel/rcu')
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--)