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    VFS: clean up and simplify getname_flags() · 3f9f0aa6
    Linus Torvalds 提交于
    This removes a number of silly games around strncpy_from_user() in
    do_getname(), and removes that helper function entirely.  We instead
    make getname_flags() just use strncpy_from_user() properly directly.
    
    Removing the wrapper function simplifies things noticeably, mostly
    because we no longer play the unnecessary games with segments (x86
    strncpy_from_user() no longer needs the hack), but also because the
    empty path handling is just much more obvious.  The return value of
    "strncpy_to_user()" is much more obvious than checking an odd error
    return case from do_getname().
    
    [ non-x86 architectures were notified of this change several weeks ago,
      since it is possible that they have copied the old broken x86
      strncpy_from_user. But nobody reacted, so .. See
    
        http://www.spinics.net/lists/linux-arch/msg17313.html
    
      for details ]
    
    Cc: linux-arch@vger.kernel.org
    Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
    3f9f0aa6
namei.c 84.1 KB