• NeilBrown's avatar
    SCHED: add some "wait..on_bit...timeout()" interfaces. · cbbce822
    NeilBrown authored
    In commit c1221321
       sched: Allow wait_on_bit_action() functions to support a timeout
    
    I suggested that a "wait_on_bit_timeout()" interface would not meet my
    need.  This isn't true - I was just over-engineering.
    
    Including a 'private' field in wait_bit_key instead of a focused
    "timeout" field was just premature generalization.  If some other
    use is ever found, it can be generalized or added later.
    
    So this patch renames "private" to "timeout" with a meaning "stop
    waiting when "jiffies" reaches or passes "timeout",
    and adds two of the many possible wait..bit..timeout() interfaces:
    
    wait_on_page_bit_killable_timeout(), which is the one I want to use,
    and out_of_line_wait_on_bit_timeout() which is a reasonably general
    example.  Others can be added as needed.
    Acked-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
    Signed-off-by: default avatarNeilBrown <neilb@suse.de>
    Acked-by: default avatarIngo Molnar <mingo@kernel.org>
    Signed-off-by: default avatarTrond Myklebust <trond.myklebust@primarydata.com>
    cbbce822
wait.c 15.7 KB