mm/page_owner.c:217:1-3: WARNING: PTR_ERR_OR_ZERO can be used

mm/page_owner.c:217:1-3: WARNING: PTR_ERR_OR_ZERO can be used

[kbuild test robot]

tree:   git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   8cd9234c64c584432f6992fe944ca9e46ca8ea76
commit: 48c96a3685795e52903e60c7ee115e5e22e7d640 mm/page_owner: keep track of page owners
date:   6 months ago


coccinelle warnings: (new ones prefixed by >>)

>> mm/page_owner.c:217:1-3: WARNING: PTR_ERR_OR_ZERO can be used

vim +217 mm/page_owner.c

   201	
   202	static const struct file_operations proc_page_owner_operations = {
   203		.read		= read_page_owner,
   204	};
   205	
   206	static int __init pageowner_init(void)
   207	{
   208		struct dentry *dentry;
   209	
   210		if (!page_owner_inited) {
   211			pr_info("page_owner is disabled\n");
   212			return 0;
   213		}
   214	
   215		dentry = debugfs_create_file("page_owner", S_IRUSR, NULL,
   216				NULL, &proc_page_owner_operations);
 > 217		if (IS_ERR(dentry))
   218			return PTR_ERR(dentry);
   219	
   220		return 0;
   221	}
   222	module_init(pageowner_init)

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