ocfs2: remove unnecessary null pointer check before kmem_cache_destroy()

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>

diff --git a/fs/ocfs2/dlm/dlmlock.c b/fs/ocfs2/dlm/dlmlock.c
index 66c2a49..7496231 100644 (file)
--- a/fs/ocfs2/dlm/dlmlock.c
+++ b/fs/ocfs2/dlm/dlmlock.c
@@ -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.

diff --git a/fs/ocfs2/dlm/dlmmaster.c b/fs/ocfs2/dlm/dlmmaster.c
index a7df226..03766fb 100644 (file)
--- a/fs/ocfs2/dlm/dlmmaster.c
+++ b/fs/ocfs2/dlm/dlmmaster.c
@@ -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 @@ bail:
 
 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)

diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index e4d54d2..a49b7c2 100644 (file)
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -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;
 }
 

diff --git a/fs/ocfs2/uptodate.c b/fs/ocfs2/uptodate.c
index 82e17b0..78f09c7 100644 (file)
--- a/fs/ocfs2/uptodate.c
+++ b/fs/ocfs2/uptodate.c
@@ -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);
 }