diff options
| author | Pranith Kumar <bobby.prani@gmail.com> | 2014-07-26 01:02:07 +0200 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2014-09-16 19:08:00 +0200 |
| commit | 949cccdbe6d286544ce3fe170298183eb7ada81c (patch) | |
| tree | b8e77651ede63d277a5ce07944a762962b2a8299 /kernel/rcu | |
| parent | rcu: Fix attempt to avoid unsolicited offloading of callbacks (diff) | |
| download | linux-949cccdbe6d286544ce3fe170298183eb7ada81c.tar.xz linux-949cccdbe6d286544ce3fe170298183eb7ada81c.zip | |
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 <bobby.prani@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Tested-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Diffstat (limited to 'kernel/rcu')
| -rw-r--r-- | kernel/rcu/tree_plugin.h | 5 |
1 files changed, 4 insertions, 1 deletions
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) |