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Subject[PATCH v3 4/4] mm, slab_common: Make the loop for initializing KMALLOC_DMA start from 1
Date
KMALLOC_DMA will be initialized only if KMALLOC_NORMAL with
the same index exists.

And kmalloc_caches[KMALLOC_NORMAL][0] is always NULL.

Therefore, the loop that initializes KMALLOC_DMA should start
at 1 instead of 0, which will reduce 1 meaningless attempt.

Signed-off-by: Pengfei Li <lpf.vector@gmail.com>
---
mm/slab_common.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/slab_common.c b/mm/slab_common.c
index af45b5278fdc..c81fc7dc2946 100644
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -1236,7 +1236,7 @@ void __init create_kmalloc_caches(slab_flags_t flags)
slab_state = UP;

#ifdef CONFIG_ZONE_DMA
- for (i = 0; i <= KMALLOC_SHIFT_HIGH; i++) {
+ for (i = 1; i <= KMALLOC_SHIFT_HIGH; i++) {
struct kmem_cache *s = kmalloc_caches[KMALLOC_NORMAL][i];

if (s) {
--
2.21.0
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