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Code Issues Releases Wiki Activity

mm/mempool: add 'else' to split mutually exclusive case 

Add else to split mutually exclusive case and avoid some unnecessary check.
It doesn't seem to change code generation (compiler is smart), but I think
it helps readability.

[akpm@linux-foundation.org: fix comment location]

Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Link: https://lkml.kernel.org/r/20200924111641.28922-1-linmiaohe@huawei.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Miaohe Lin 2020-10-13 16:57:14 -07:00 committed by Linus Torvalds
parent f8fd52535c
commit 544941d788
1 changed files with 8 additions and 10 deletions
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18
mm/mempool.c
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@ -58,11 +58,10 @@ static void __check_element(mempool_t *pool, void *element, size_t size)
static void check_element(mempool_t *pool, void *element)
{
/* Mempools backed by slab allocator */
if (pool->free == mempool_free_slab || pool->free == mempool_kfree)
if (pool->free == mempool_free_slab || pool->free == mempool_kfree) {
__check_element(pool, element, ksize(element));
/* Mempools backed by page allocator */
if (pool->free == mempool_free_pages) {
} else if (pool->free == mempool_free_pages) {
/* Mempools backed by page allocator */
int order = (int)(long)pool->pool_data;
void *addr = kmap_atomic((struct page *)element);
@ -82,11 +81,10 @@ static void __poison_element(void *element, size_t size)
static void poison_element(mempool_t *pool, void *element)
{
/* Mempools backed by slab allocator */
if (pool->alloc == mempool_alloc_slab || pool->alloc == mempool_kmalloc)
if (pool->alloc == mempool_alloc_slab || pool->alloc == mempool_kmalloc) {
__poison_element(element, ksize(element));
/* Mempools backed by page allocator */
if (pool->alloc == mempool_alloc_pages) {
} else if (pool->alloc == mempool_alloc_pages) {
/* Mempools backed by page allocator */
int order = (int)(long)pool->pool_data;
void *addr = kmap_atomic((struct page *)element);
@ -107,7 +105,7 @@ static __always_inline void kasan_poison_element(mempool_t *pool, void *element)
{
if (pool->alloc == mempool_alloc_slab || pool->alloc == mempool_kmalloc)
kasan_poison_kfree(element, _RET_IP_);
if (pool->alloc == mempool_alloc_pages)
else if (pool->alloc == mempool_alloc_pages)
kasan_free_pages(element, (unsigned long)pool->pool_data);
}
@ -115,7 +113,7 @@ static void kasan_unpoison_element(mempool_t *pool, void *element)
{
if (pool->alloc == mempool_alloc_slab || pool->alloc == mempool_kmalloc)
kasan_unpoison_slab(element);
if (pool->alloc == mempool_alloc_pages)
else if (pool->alloc == mempool_alloc_pages)
kasan_alloc_pages(element, (unsigned long)pool->pool_data);
}