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ocfs2: remove unnecessary null pointer check before kmem_cache_destroy()

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As kmem_cache_destroy() already handles null pointers, so we can remove
the conditional test entirely.

Link: http://lkml.kernel.org/r/5A9EB21D.3000209@huawei.com
Signed-off-by: Jun Piao <piaojun@huawei.com>
Reviewed-by: Yiwen Jiang <jiangyiwen@huawei.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Joseph Qi <jiangqi903@gmail.com>
Cc: Changwei Ge <ge.changwei@h3c.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
piaojun 2018-04-05 16:18:52 -07:00 committed by Linus Torvalds
parent bb34f24c7d
commit a17b485aae
4 changed files with 13 additions and 26 deletions
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3
fs/ocfs2/dlm/dlmlock.c
View File

@ -77,8 +77,7 @@ int dlm_init_lock_cache(void)
void dlm_destroy_lock_cache(void)
{
if (dlm_lock_cache)
kmem_cache_destroy(dlm_lock_cache);
kmem_cache_destroy(dlm_lock_cache);
}
/* Tell us whether we can grant a new lock request.

15
fs/ocfs2/dlm/dlmmaster.c
View File

@ -414,8 +414,7 @@ int dlm_init_mle_cache(void)
void dlm_destroy_mle_cache(void)
{
if (dlm_mle_cache)
kmem_cache_destroy(dlm_mle_cache);
kmem_cache_destroy(dlm_mle_cache);
}
static void dlm_mle_release(struct kref *kref)
@ -472,15 +471,11 @@ int dlm_init_master_caches(void)
void dlm_destroy_master_caches(void)
{
if (dlm_lockname_cache) {
kmem_cache_destroy(dlm_lockname_cache);
dlm_lockname_cache = NULL;
}
kmem_cache_destroy(dlm_lockname_cache);
dlm_lockname_cache = NULL;
if (dlm_lockres_cache) {
kmem_cache_destroy(dlm_lockres_cache);
dlm_lockres_cache = NULL;
}
kmem_cache_destroy(dlm_lockres_cache);
dlm_lockres_cache = NULL;
}
static void dlm_lockres_release(struct kref *kref)

18
fs/ocfs2/super.c
View File

@ -1768,12 +1768,9 @@ static int ocfs2_initialize_mem_caches(void)
NULL);
if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep ||
!ocfs2_qf_chunk_cachep) {
if (ocfs2_inode_cachep)
kmem_cache_destroy(ocfs2_inode_cachep);
if (ocfs2_dquot_cachep)
kmem_cache_destroy(ocfs2_dquot_cachep);
if (ocfs2_qf_chunk_cachep)
kmem_cache_destroy(ocfs2_qf_chunk_cachep);
kmem_cache_destroy(ocfs2_inode_cachep);
kmem_cache_destroy(ocfs2_dquot_cachep);
kmem_cache_destroy(ocfs2_qf_chunk_cachep);
return -ENOMEM;
}
@ -1787,16 +1784,13 @@ static void ocfs2_free_mem_caches(void)
* destroy cache.
*/
rcu_barrier();
if (ocfs2_inode_cachep)
kmem_cache_destroy(ocfs2_inode_cachep);
kmem_cache_destroy(ocfs2_inode_cachep);
ocfs2_inode_cachep = NULL;
if (ocfs2_dquot_cachep)
kmem_cache_destroy(ocfs2_dquot_cachep);
kmem_cache_destroy(ocfs2_dquot_cachep);
ocfs2_dquot_cachep = NULL;
if (ocfs2_qf_chunk_cachep)
kmem_cache_destroy(ocfs2_qf_chunk_cachep);
kmem_cache_destroy(ocfs2_qf_chunk_cachep);
ocfs2_qf_chunk_cachep = NULL;
}

3
fs/ocfs2/uptodate.c
View File

@ -633,6 +633,5 @@ int __init init_ocfs2_uptodate_cache(void)
void exit_ocfs2_uptodate_cache(void)
{
if (ocfs2_uptodate_cachep)
kmem_cache_destroy(ocfs2_uptodate_cachep);
kmem_cache_destroy(ocfs2_uptodate_cachep);
}