linux-kernel - Re: [RFC][PATCH 0/5] do not dereference NULL pools in pools' destroy() functions

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Date:	Wed, 10 Jun 2015 07:46:03 +0200 (CEST)
From:	Julia Lawall <julia.lawall@...6.fr>
To:	Joe Perches <joe@...ches.com>
cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Julia Lawall <julia.lawall@...6.fr>,
	Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
	Minchan Kim <minchan@...nel.org>,
	Christoph Lameter <cl@...ux.com>,
	Pekka Enberg <penberg@...nel.org>,
	Joonsoo Kim <iamjoonsoo.kim@....com>,
	Michal Hocko <mhocko@...e.cz>,
	David Rientjes <rientjes@...gle.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, sergey.senozhatsky.work@...il.com
Subject: Re: [RFC][PATCH 0/5] do not dereference NULL pools in pools' destroy()
 functions

> > Well I like it, even though it's going to cause a zillion little cleanup
> > patches.

Actually only at most 87.  There are some functions that look quite a bit 
nicer with the change, like:

 void jffs2_destroy_slab_caches(void)
 {
-       if(full_dnode_slab)
-               kmem_cache_destroy(full_dnode_slab);
-       if(raw_dirent_slab)
-               kmem_cache_destroy(raw_dirent_slab);
-       if(raw_inode_slab)
-               kmem_cache_destroy(raw_inode_slab);
-       if(tmp_dnode_info_slab)
-               kmem_cache_destroy(tmp_dnode_info_slab);
-       if(raw_node_ref_slab)
-               kmem_cache_destroy(raw_node_ref_slab);
-       if(node_frag_slab)
-               kmem_cache_destroy(node_frag_slab);
-       if(inode_cache_slab)
-               kmem_cache_destroy(inode_cache_slab);
+       kmem_cache_destroy(full_dnode_slab);
+       kmem_cache_destroy(raw_dirent_slab);
+       kmem_cache_destroy(raw_inode_slab);
+       kmem_cache_destroy(tmp_dnode_info_slab);
+       kmem_cache_destroy(raw_node_ref_slab);
+       kmem_cache_destroy(node_frag_slab);
+       kmem_cache_destroy(inode_cache_slab);
 #ifdef CONFIG_JFFS2_FS_XATTR
-       if (xattr_datum_cache)
-               kmem_cache_destroy(xattr_datum_cache);
-       if (xattr_ref_cache)
-               kmem_cache_destroy(xattr_ref_cache);
+       kmem_cache_destroy(xattr_datum_cache);
+       kmem_cache_destroy(xattr_ref_cache);
 #endif
 }

I can try to check and submit the patches.

julia
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