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由 Heiko Carstens 提交于
arch_spin_lock_wait_flags() checks if a spinlock is not held before trying a compare and swap instruction. If the lock is unlocked it tries the compare and swap instruction, however if a different cpu grabbed the lock in the meantime the instruction will fail as expected. Subsequently the arch_spin_lock_wait_flags() incorrectly tries to figure out if the cpu that holds the lock is running. However it is using the wrong cpu number for this (-1) and then will also yield the current cpu to the wrong cpu. Fix this by adding a missing continue statement. Fixes: 470ada6b ("s390/spinlock: refactor arch_spin_lock_wait[_flags]") Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Acked-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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