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Re: [PATCH 3/7] nfsd: remove redundant i_lookup check

From Al Viro <viro@ZenIV.linux.org.uk>
Newsgroups linux.kernel
Subject Re: [PATCH 3/7] nfsd: remove redundant i_lookup check
Date 2016-07-24 02:30 +0200
Message-ID <rYfsR-Wz-3@gated-at.bofh.it> (permalink)
References <rXMKd-r1-3@gated-at.bofh.it> <rXMKd-r1-1@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Fri, Jul 22, 2016 at 01:48:52PM -0400, J. Bruce Fields wrote:
> From: "J. Bruce Fields" <bfields@redhat.com>
> 
> I'm not sure why this was added.  It doesn't seem necessary, and no
> other caller does this.

lookup_one_len() will explode if you call it for non-directory (==
!d_can_lookup(), i.e. something without ->lookup()).  So unless the callers
do guarantee that check being true, it *is* needed.

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Thread

[PATCH 3/7] nfsd: remove redundant i_lookup check "J. Bruce Fields" <bfields@redhat.com> - 2016-07-22 19:50 +0200
  Re: [PATCH 3/7] nfsd: remove redundant i_lookup check Al Viro <viro@ZenIV.linux.org.uk> - 2016-07-24 02:30 +0200
    Re: [PATCH 3/7] nfsd: remove redundant i_lookup check "J. Bruce Fields" <bfields@fieldses.org> - 2016-07-24 14:20 +0200
      Re: [PATCH 3/7] nfsd: remove redundant i_lookup check Al Viro <viro@ZenIV.linux.org.uk> - 2016-07-24 16:30 +0200
        Re: [PATCH 3/7] nfsd: remove redundant i_lookup check "J. Bruce Fields" <bfields@fieldses.org> - 2016-07-24 22:30 +0200

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