[PATCH 4.19 129/243] dlm: NULL check before kmem_cache_destroy is not needed

Greg Kroah-Hartman
2019-12-11T15:21:23Z

From: Wen Yang <wen.yang99@zte.com.cn>

[ Upstream commit f31a89692830061bceba8469607e4e4b0f900159 ]

kmem_cache_destroy(NULL) is safe, so removes NULL check before
freeing the mem. This patch also fix ifnullfree.cocci warnings.

Signed-off-by: Wen Yang <wen.yang99@zte.com.cn>
Signed-off-by: David Teigland <teigland@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/dlm/memory.c | 9 +++------
1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/fs/dlm/memory.c b/fs/dlm/memory.c
index 7cd24bccd4fe5..37be29f21d04d 100644
--- a/fs/dlm/memory.c
+++ b/fs/dlm/memory.c
@@ -38,10 +38,8 @@ int __init dlm_memory_init(void)

void dlm_memory_exit(void)
{
- if (lkb_cache)
- kmem_cache_destroy(lkb_cache);
- if (rsb_cache)
- kmem_cache_destroy(rsb_cache);
+ kmem_cache_destroy(lkb_cache);
+ kmem_cache_destroy(rsb_cache);
}

char *dlm_allocate_lvb(struct dlm_ls *ls)
@@ -86,8 +84,7 @@ void dlm_free_lkb(struct dlm_lkb *lkb)
struct dlm_user_args *ua;
ua = lkb->lkb_ua;
if (ua) {
- if (ua->lksb.sb_lvbptr)
- kfree(ua->lksb.sb_lvbptr);
+ kfree(ua->lksb.sb_lvbptr);
kfree(ua);
}
}
--
2.20.1