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[GFS2] Add a comment in ops_export.c

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Ass a comment explaining the slightly odd construct used to
pass error values back.

Cc: Jan Engelhardt <jengelh@linux01.gwdg.de>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
This commit is contained in:
Steven Whitehouse 2006-09-05 15:56:17 -04:00
parent 2c1e52aa90
commit 7b62536141
1 changed files with 4 additions and 0 deletions
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4
fs/gfs2/ops_export.c
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@ -182,6 +182,10 @@ static struct dentry *gfs2_get_parent(struct dentry *child)
if (!inode)
return ERR_PTR(-ENOENT);
/*
* In case of an error, @inode carries the error value, and we
* have to return that as a(n invalid) pointer to dentry.
*/
if (IS_ERR(inode))
return ERR_PTR(PTR_ERR(inode));