• Paul E. McKenney's avatar
    exit: Replace spin_unlock_wait() with lock/unlock pair · 8083f293
    Paul E. McKenney authored
    There is no agreed-upon definition of spin_unlock_wait()'s semantics, and
    it appears that all callers could do just as well with a lock/unlock pair.
    This commit therefore replaces the spin_unlock_wait() call in do_exit()
    with spin_lock() followed immediately by spin_unlock().  This should be
    safe from a performance perspective because the lock is a per-task lock,
    and this is happening only at task-exit time.
    Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
    Cc: Ingo Molnar <mingo@kernel.org>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Will Deacon <will.deacon@arm.com>
    Cc: Alan Stern <stern@rowland.harvard.edu>
    Cc: Andrea Parri <parri.andrea@gmail.com>
    Cc: Linus Torvalds <torvalds@linux-foundation.org>
exit.c 44.2 KB