• Zach Brown's avatar
    [PATCH] add AOP_TRUNCATED_PAGE, prepend AOP_ to WRITEPAGE_ACTIVATE · 994fc28c
    Zach Brown authored
    readpage(), prepare_write(), and commit_write() callers are updated to
    understand the special return code AOP_TRUNCATED_PAGE in the style of
    writepage() and WRITEPAGE_ACTIVATE.  AOP_TRUNCATED_PAGE tells the caller that
    the callee has unlocked the page and that the operation should be tried again
    with a new page.  OCFS2 uses this to detect and work around a lock inversion in
    its aop methods.  There should be no change in behaviour for methods that don't
    return AOP_TRUNCATED_PAGE.
    
    WRITEPAGE_ACTIVATE is also prepended with AOP_ for consistency and they are
    made enums so that kerneldoc can be used to document their semantics.
    Signed-off-by: default avatarZach Brown <zach.brown@oracle.com>
    994fc28c
shmem.c 55.9 KB