mm/slab.c: remove unneed check in cpuup_canceled

nc is a member of percpu allocation memory, and cannot be NULL. Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Li RongQing <[email protected]> Reviewed-by: Andrew Morton <[email protected]> Acked-by: Christoph Lameter <[email protected]> Cc: Pekka Enberg <[email protected]> Cc: David Rientjes <[email protected]> Cc: Joonsoo Kim <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
berg · May 14, 2019 · 517f9f1 · 517f9f1
1 parent a4d3f89
commit 517f9f1
Showing 1 changed file with 2 additions and 4 deletions.
diff --git a/mm/slab.c b/mm/slab.c
@@ -990,10 +990,8 @@ static void cpuup_canceled(long cpu)
 
 		/* cpu is dead; no one can alloc from it. */
 		nc = per_cpu_ptr(cachep->cpu_cache, cpu);
-		if (nc) {
-			free_block(cachep, nc->entry, nc->avail, node, &list);
-			nc->avail = 0;
-		}
+		free_block(cachep, nc->entry, nc->avail, node, &list);
+		nc->avail = 0;
 
 		if (!cpumask_empty(mask)) {
 			spin_unlock_irq(&n->list_lock);