[PATCH] Catch kmalloc() failure in kmem_cache_init()

[Johannes Weiner]

Hi,

This patch makes kmem_cache_init() trigger a BUG when the calls to
kmalloc() fail. Altough the kernel would not boot anyway on failure,
this adds some clarity to the code.

Signed-off-by: Johannes Weiner <hannes-kernel@xxxxxxxxxxxx>

diff --git a/mm/slab.c b/mm/slab.c
index 57f7aa4..6d7e486 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -1512,6 +1512,7 @@ void __init kmem_cache_init(void)
 		struct array_cache *ptr;
 
 		ptr = kmalloc(sizeof(struct arraycache_init), GFP_KERNEL);
+		BUG_ON(!ptr);
 
 		local_irq_disable();
 		BUG_ON(cpu_cache_get(&cache_cache) != &initarray_cache.cache);
@@ -1526,6 +1527,7 @@ void __init kmem_cache_init(void)
 		local_irq_enable();
 
 		ptr = kmalloc(sizeof(struct arraycache_init), GFP_KERNEL);
+		BUG_ON(!ptr);
 
 		local_irq_disable();
 		BUG_ON(cpu_cache_get(malloc_sizes[INDEX_AC].cs_cachep)