• Al Viro's avatar
    new helper: lookup_positive_unlocked() · 6c2d4798
    Al Viro authored
    Most of the callers of lookup_one_len_unlocked() treat negatives are
    ERR_PTR(-ENOENT).  Provide a helper that would do just that.  Note
    that a pinned positive dentry remains positive - it's ->d_inode is
    stable, etc.; a pinned _negative_ dentry can become positive at any
    point as long as you are not holding its parent at least shared.
    So using lookup_one_len_unlocked() needs to be careful;
    lookup_positive_unlocked() is safer and that's what the callers
    end up open-coding anyway.
    Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
    6c2d4798
mount.c 9.46 KB