mm/page_owner.c: use PTR_ERR_OR_ZERO()

Fix ptr_ret.cocci warnings:

  mm/page_owner.c:639:1-3: WARNING: PTR_ERR_OR_ZERO can be used

Use PTR_ERR_OR_ZERO rather than if(IS_ERR(...)) + PTR_ERR

Generated by: scripts/coccinelle/api/ptr_ret.cocci

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Vasyl Gomonovych <[email protected]>
Acked-by: Vlastimil Babka <[email protected]>
Acked-by: Michal Hocko <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

diff --git a/mm/page_owner.c b/mm/page_owner.c
index 270a8219ccd03b0099c48bd267075a7b0d8eadd6..06a0055f45a6b5ba6660f66d0ed71ffbdcbc2f46 100644 (file)
--- a/mm/page_owner.c
+++ b/mm/page_owner.c
@@ -635,9 +635,7 @@ static int __init pageowner_init(void)
 
        dentry = debugfs_create_file("page_owner", S_IRUSR, NULL,
                        NULL, &proc_page_owner_operations);
-       if (IS_ERR(dentry))
-               return PTR_ERR(dentry);
 
-       return 0;
+       return PTR_ERR_OR_ZERO(dentry);
 }
 late_initcall(pageowner_init)