crypto: pcrypt - Use the online cpumask as the default
Steffen Klassert [Wed, 28 Mar 2012 06:51:03 +0000 (08:51 +0200)]
We use the active cpumask to determine the superset of cpus
to use for parallelization. However, the active cpumask is
for internal usage of the scheduler and therefore not the
appropriate cpumask for these purposes. So use the online
cpumask instead.

Reported-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/pcrypt.c

index 29a89da..b2c99dc 100644 (file)
@@ -280,11 +280,11 @@ static int pcrypt_aead_init_tfm(struct crypto_tfm *tfm)
 
        ictx->tfm_count++;
 
-       cpu_index = ictx->tfm_count % cpumask_weight(cpu_active_mask);
+       cpu_index = ictx->tfm_count % cpumask_weight(cpu_online_mask);
 
-       ctx->cb_cpu = cpumask_first(cpu_active_mask);
+       ctx->cb_cpu = cpumask_first(cpu_online_mask);
        for (cpu = 0; cpu < cpu_index; cpu++)
-               ctx->cb_cpu = cpumask_next(ctx->cb_cpu, cpu_active_mask);
+               ctx->cb_cpu = cpumask_next(ctx->cb_cpu, cpu_online_mask);
 
        cipher = crypto_spawn_aead(crypto_instance_ctx(inst));
 
@@ -472,7 +472,7 @@ static int pcrypt_init_padata(struct padata_pcrypt *pcrypt,
                goto err_free_padata;
        }
 
-       cpumask_and(mask->mask, cpu_possible_mask, cpu_active_mask);
+       cpumask_and(mask->mask, cpu_possible_mask, cpu_online_mask);
        rcu_assign_pointer(pcrypt->cb_cpumask, mask);
 
        pcrypt->nblock.notifier_call = pcrypt_cpumask_change_notify;