From 949cccdbe6d286544ce3fe170298183eb7ada81c Mon Sep 17 00:00:00 2001 From: Pranith Kumar Date: Fri, 25 Jul 2014 16:02:07 -0700 Subject: [PATCH] rcu: Check the return value of zalloc_cpumask_var() This commit checks the return value of the zalloc_cpumask_var() used for allocating cpumask for rcu_nocb_mask. Signed-off-by: Pranith Kumar Signed-off-by: Paul E. McKenney Tested-by: Paul Gortmaker --- kernel/rcu/tree_plugin.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h index 06d077ccf8d5..105b0ce3d78f 100644 --- a/kernel/rcu/tree_plugin.h +++ b/kernel/rcu/tree_plugin.h @@ -2440,7 +2440,10 @@ void __init rcu_init_nohz(void) #endif /* #if defined(CONFIG_NO_HZ_FULL) */ if (!have_rcu_nocb_mask && need_rcu_nocb_mask) { - zalloc_cpumask_var(&rcu_nocb_mask, GFP_KERNEL); + if (!zalloc_cpumask_var(&rcu_nocb_mask, GFP_KERNEL)) { + pr_info("rcu_nocb_mask allocation failed, callback offloading disabled.\n"); + return; + } have_rcu_nocb_mask = true; } if (!have_rcu_nocb_mask) -- 2.20.1