1/****************************************************************************
2 ****************************************************************************
3 ***
4 ***   This header was automatically generated from a Linux kernel header
5 ***   of the same name, to make information necessary for userspace to
6 ***   call into the kernel available to libc.  It contains only constants,
7 ***   structures, and macros generated from the original header, and thus,
8 ***   contains no copyrightable information.
9 ***
10 ****************************************************************************
11 ****************************************************************************/
12#ifndef _LINUX_BLOCKGROUP_LOCK_H
13#define _LINUX_BLOCKGROUP_LOCK_H
14
15#include <linux/spinlock.h>
16#include <linux/cache.h>
17
18#define NR_BG_LOCKS 1
19
20struct bgl_lock {
21 spinlock_t lock;
22} ____cacheline_aligned_in_smp;
23
24struct blockgroup_lock {
25 struct bgl_lock locks[NR_BG_LOCKS];
26};
27
28#define sb_bgl_lock(sb, block_group)   (&(sb)->s_blockgroup_lock.locks[(block_group) & (NR_BG_LOCKS-1)].lock)
29#endif
30