diff options
author | Nick Piggin <npiggin@kernel.dk> | 2011-01-07 17:49:17 +1100 |
---|---|---|
committer | Nick Piggin <npiggin@kernel.dk> | 2011-01-07 17:50:16 +1100 |
commit | ccd35fb9f4da856b105ea0f1e0cab3702e8ae6ba (patch) | |
tree | acb71aa4ae7d1f1ed17bdd79033a6bad5e27186d /mm/slub.c | |
parent | 786a5e15b613a9cee4fc9139fc3113a5ab0fde79 (diff) | |
download | kernel_samsung_espresso10-ccd35fb9f4da856b105ea0f1e0cab3702e8ae6ba.zip kernel_samsung_espresso10-ccd35fb9f4da856b105ea0f1e0cab3702e8ae6ba.tar.gz kernel_samsung_espresso10-ccd35fb9f4da856b105ea0f1e0cab3702e8ae6ba.tar.bz2 |
kernel: kmem_ptr_validate considered harmful
This is a nasty and error prone API. It is no longer used, remove it.
Signed-off-by: Nick Piggin <npiggin@kernel.dk>
Diffstat (limited to 'mm/slub.c')
-rw-r--r-- | mm/slub.c | 40 |
1 files changed, 0 insertions, 40 deletions
@@ -1917,17 +1917,6 @@ void kmem_cache_free(struct kmem_cache *s, void *x) } EXPORT_SYMBOL(kmem_cache_free); -/* Figure out on which slab page the object resides */ -static struct page *get_object_page(const void *x) -{ - struct page *page = virt_to_head_page(x); - - if (!PageSlab(page)) - return NULL; - - return page; -} - /* * Object placement in a slab is made very easy because we always start at * offset 0. If we tune the size of the object to the alignment then we can @@ -2386,35 +2375,6 @@ error: } /* - * Check if a given pointer is valid - */ -int kmem_ptr_validate(struct kmem_cache *s, const void *object) -{ - struct page *page; - - if (!kern_ptr_validate(object, s->size)) - return 0; - - page = get_object_page(object); - - if (!page || s != page->slab) - /* No slab or wrong slab */ - return 0; - - if (!check_valid_pointer(s, page, object)) - return 0; - - /* - * We could also check if the object is on the slabs freelist. - * But this would be too expensive and it seems that the main - * purpose of kmem_ptr_valid() is to check if the object belongs - * to a certain slab. - */ - return 1; -} -EXPORT_SYMBOL(kmem_ptr_validate); - -/* * Determine the size of a slab object */ unsigned int kmem_cache_size(struct kmem_cache *s) |