Messages in this thread | | | Date | Thu, 30 Jul 2009 17:36:58 +0200 | From | Johannes Weiner <> | Subject | Re: [PATCH 3/5] mm: Add kmalloc NULL tests |
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Hello Julia,
On Thu, Jul 30, 2009 at 04:10:22PM +0200, Julia Lawall wrote:
> diff --git a/mm/slab.c b/mm/slab.c > index 7b5d4de..972e427 100644 > --- a/mm/slab.c > +++ b/mm/slab.c > @@ -1502,6 +1502,7 @@ void __init kmem_cache_init(void) > > ptr = kmalloc(sizeof(struct arraycache_init), GFP_NOWAIT); > > + BUG_ON(!ptr); > BUG_ON(cpu_cache_get(&cache_cache) != &initarray_cache.cache); > memcpy(ptr, cpu_cache_get(&cache_cache), > sizeof(struct arraycache_init));
This does not change the end result when the allocation fails: you get a stacktrace and a kernel panic. Leaving it as is saves a line of code.
> @@ -1514,6 +1515,7 @@ void __init kmem_cache_init(void) > > ptr = kmalloc(sizeof(struct arraycache_init), GFP_NOWAIT); > > + BUG_ON(!ptr); > BUG_ON(cpu_cache_get(malloc_sizes[INDEX_AC].cs_cachep) > != &initarray_generic.cache); > memcpy(ptr, cpu_cache_get(malloc_sizes[INDEX_AC].cs_cachep),
Hannes
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