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rcu: Shut up spurious gcc uninitialized-variable warning
Because gcc doesn't realize that rcu_num_lvls must be strictly greater than zero, some versions give a spurious warning about levelcnt[0] being uninitialized in rcu_init_one(). This commit updates the condition on the pre-existing panic() in order to educate gcc on this point. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
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1 changed files with 3 additions and 3 deletions
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@ -3982,9 +3982,9 @@ static void __init rcu_init_one(struct rcu_state *rsp,
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BUILD_BUG_ON(MAX_RCU_LVLS > ARRAY_SIZE(buf)); /* Fix buf[] init! */
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BUILD_BUG_ON(MAX_RCU_LVLS > ARRAY_SIZE(buf)); /* Fix buf[] init! */
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/* Silence gcc 4.8 warning about array index out of range. */
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/* Silence gcc 4.8 false positive about array index out of range. */
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if (rcu_num_lvls > RCU_NUM_LVLS)
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if (rcu_num_lvls <= 0 || rcu_num_lvls > RCU_NUM_LVLS)
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panic("rcu_init_one: rcu_num_lvls overflow");
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panic("rcu_init_one: rcu_num_lvls out of range");
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/* Initialize the level-tracking arrays. */
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/* Initialize the level-tracking arrays. */
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