From: Akinobu Mita SLOB doesn't calculate correct page order when page size is not 4KB. This patch fixes it with using get_order() instead of find_order() which is SLOB version of get_order(). Signed-off-by: Akinobu Mita Acked-by: Matt Mackall Cc: Signed-off-by: Andrew Morton --- mm/slob.c | 15 +++------------ 1 files changed, 3 insertions(+), 12 deletions(-) diff -puN mm/slob.c~slob-fix-page-order-calculation-on-not-4kb-page mm/slob.c --- a/mm/slob.c~slob-fix-page-order-calculation-on-not-4kb-page +++ a/mm/slob.c @@ -150,15 +150,6 @@ static void slob_free(void *block, int s spin_unlock_irqrestore(&slob_lock, flags); } -static int FASTCALL(find_order(int size)); -static int fastcall find_order(int size) -{ - int order = 0; - for ( ; size > 4096 ; size >>=1) - order++; - return order; -} - void *__kmalloc(size_t size, gfp_t gfp) { slob_t *m; @@ -174,7 +165,7 @@ void *__kmalloc(size_t size, gfp_t gfp) if (!bb) return 0; - bb->order = find_order(size); + bb->order = get_order(size); bb->pages = (void *)__get_free_pages(gfp, bb->order); if (bb->pages) { @@ -318,7 +309,7 @@ void *kmem_cache_alloc(struct kmem_cache if (c->size < PAGE_SIZE) b = slob_alloc(c->size, flags, c->align); else - b = (void *)__get_free_pages(flags, find_order(c->size)); + b = (void *)__get_free_pages(flags, get_order(c->size)); if (c->ctor) c->ctor(b, c, SLAB_CTOR_CONSTRUCTOR); @@ -345,7 +336,7 @@ void kmem_cache_free(struct kmem_cache * if (c->size < PAGE_SIZE) slob_free(b, c->size); else - free_pages((unsigned long)b, find_order(c->size)); + free_pages((unsigned long)b, get_order(c->size)); } EXPORT_SYMBOL(kmem_cache_free); _