30 lines
1.0 KiB
C
30 lines
1.0 KiB
C
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/****************************************************************************
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****************************************************************************
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***
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*** This header was automatically generated from a Linux kernel header
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*** of the same name, to make information necessary for userspace to
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*** call into the kernel available to libc. It contains only constants,
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*** structures, and macros generated from the original header, and thus,
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*** contains no copyrightable information.
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***
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****************************************************************************
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****************************************************************************/
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#ifndef _LINUX_BLOCKGROUP_LOCK_H
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#define _LINUX_BLOCKGROUP_LOCK_H
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#include <linux/spinlock.h>
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#include <linux/cache.h>
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#define NR_BG_LOCKS 1
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struct bgl_lock {
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spinlock_t lock;
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} ____cacheline_aligned_in_smp;
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struct blockgroup_lock {
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struct bgl_lock locks[NR_BG_LOCKS];
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};
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#define sb_bgl_lock(sb, block_group) (&(sb)->s_blockgroup_lock.locks[(block_group) & (NR_BG_LOCKS-1)].lock)
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#endif
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