ipc_m1_lock 44 drivers/mailbox/pl320-ipc.c static DEFINE_MUTEX(ipc_m1_lock); ipc_m1_lock 81 drivers/mailbox/pl320-ipc.c mutex_lock(&ipc_m1_lock); ipc_m1_lock 94 drivers/mailbox/pl320-ipc.c mutex_unlock(&ipc_m1_lock);