down_trylock 541 fs/xfs/linux-2.6/xfs_buf.c if (down_trylock(&bp->b_sema)) { down_trylock 881 fs/xfs/linux-2.6/xfs_buf.c locked = down_trylock(&bp->b_sema) == 0; down_trylock 45 include/linux/semaphore.h extern int __must_check down_trylock(struct semaphore *sem); down_trylock 500 include/linux/usb.h #define usb_trylock_device(udev) down_trylock(&(udev)->dev.sem) down_trylock 972 kernel/printk.c if (down_trylock(&console_sem)) down_trylock 1071 kernel/printk.c if (down_trylock(&console_sem) != 0)