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fc589a3ce5
Map an mutex_lock_interruptible() error return into ERESTARTSYS, as the only possible error from mutex_lock_interruptible is EINTR, and that will only happen if signal_pending() causes the mutex lock attempt to abort. This still allows signals to be delivered ASAP, which is much nicer than just doing mutex_lock, and still shadows userspace from EINTR when SA_RESTART is active. Problem reported by Peter Jordan. Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Cc: Jean Delvare <khali@linux-fr.org> Cc: Peter Jordan <usernetwork@gmx.info> Cc: Richard Neill <rn214@hermes.cam.ac.uk> Signed-off-by: Len Brown <len.brown@intel.com>