| 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
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| 2 | /* |
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| 3 | * Copyright (C) International Business Machines Corp., 2000-2001 |
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| 4 | * Portions Copyright (C) Christoph Hellwig, 2001-2002 |
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| 5 | */ |
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| 6 | #ifndef _H_JFS_LOCK |
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| 7 | #define _H_JFS_LOCK |
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| 8 | |
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| 9 | #include <linux/spinlock.h> |
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| 10 | #include <linux/mutex.h> |
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| 11 | #include <linux/sched.h> |
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| 12 | |
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| 13 | /* |
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| 14 | * jfs_lock.h |
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| 15 | */ |
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| 16 | |
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| 17 | /* |
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| 18 | * Conditional sleep where condition is protected by spinlock |
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| 19 | * |
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| 20 | * lock_cmd and unlock_cmd take and release the spinlock |
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| 21 | */ |
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| 22 | #define __SLEEP_COND(wq, cond, lock_cmd, unlock_cmd) \ |
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| 23 | do { \ |
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| 24 | DECLARE_WAITQUEUE(__wait, current); \ |
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| 25 | \ |
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| 26 | add_wait_queue(&wq, &__wait); \ |
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| 27 | for (;;) { \ |
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| 28 | set_current_state(TASK_UNINTERRUPTIBLE);\ |
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| 29 | if (cond) \ |
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| 30 | break; \ |
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| 31 | unlock_cmd; \ |
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| 32 | io_schedule(); \ |
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| 33 | lock_cmd; \ |
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| 34 | } \ |
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| 35 | __set_current_state(TASK_RUNNING); \ |
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| 36 | remove_wait_queue(&wq, &__wait); \ |
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| 37 | } while (0) |
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| 38 | |
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| 39 | #endif /* _H_JFS_LOCK */ |
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| 40 | |
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