From: "Paul E. McKenney" <[email protected]> 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 <[email protected]> Reported-by: Geert Uytterhoeven <[email protected]> Signed-off-by: Paul E. McKenney <[email protected]> --- kernel/rcu/rcu.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/kernel/rcu/rcu.h b/kernel/rcu/rcu.h index aeec70f..ab504fb 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--) -- 2.9.5
