From: zhaoxinchao <chrisxinchao@xxxxxxxxxxx>
Actually __kmem_cache_create() returns a status :
0 is success
nonezero are failed.
This function has three return positions. In addition to successfully
return 0, the first failed position will return - E2BIG, and the second
position will return nonzero value for setup_cpu_cache function failure.
Signed-off-by: zhaoxinchao <chrisxinchao@xxxxxxxxxxx>
---
mm/slab.c | 13 +++++++------
1 file changed, 7 insertions(+), 6 deletions(-)
diff --git a/mm/slab.c b/mm/slab.c
index edbe722fb..ebd326f07 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -1888,14 +1888,17 @@ static bool set_on_slab_cache(struct kmem_cache *cachep,
return true;
}
-/**
+/*
* __kmem_cache_create - Create a cache.
* @cachep: cache management descriptor
* @flags: SLAB flags
*
- * Returns a ptr to the cache on success, NULL on failure.
- * Cannot be called within an int, but can be interrupted.
- * The @ctor is run when new pages are allocated by the cache.
+ * Returns zero on success, nonzero on failure.
+ * This function has three return positions.
+ * In addition to successfully return 0, the
+ * first failed position will return - E2BIG,
+ * and the second position will return nonzero
+ * value for setup_cpu_cache function failure.
*
* The flags are
*
@@ -1908,8 +1911,6 @@ static bool set_on_slab_cache(struct kmem_cache *cachep,
* %SLAB_HWCACHE_ALIGN - Align the objects in this cache to a hardware
* cacheline. This can be beneficial if you're counting cycles as closely
* as davem.
- *
- * Return: a pointer to the created cache or %NULL in case of error
*/
int __kmem_cache_create(struct kmem_cache *cachep, slab_flags_t flags)
{
--
2.39.2
