Release 4.10 include/linux/blockgroup_lock.h
#ifndef _LINUX_BLOCKGROUP_LOCK_H
#define _LINUX_BLOCKGROUP_LOCK_H
/*
* Per-blockgroup locking for ext2 and ext3.
*
* Simple hashed spinlocking.
*/
#include <linux/spinlock.h>
#include <linux/cache.h>
#ifdef CONFIG_SMP
#define NR_BG_LOCKS (4 << ilog2(NR_CPUS < 32 ? NR_CPUS : 32))
#else
#define NR_BG_LOCKS 1
#endif
struct bgl_lock {
spinlock_t lock;
}
____cacheline_aligned_in_smp;
struct blockgroup_lock {
struct bgl_lock locks[NR_BG_LOCKS];
};
static inline void bgl_lock_init(struct blockgroup_lock *bgl)
{
int i;
for (i = 0; i < NR_BG_LOCKS; i++)
spin_lock_init(&bgl->locks[i].lock);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| andrew morton | andrew morton | 41 | 100.00% | 1 | 100.00% |
| Total | 41 | 100.00% | 1 | 100.00% |
static inline spinlock_t *
bgl_lock_ptr(struct blockgroup_lock *bgl, unsigned int block_group)
{
return &bgl->locks[block_group & (NR_BG_LOCKS-1)].lock;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| pekka j enberg | pekka j enberg | 30 | 88.24% | 1 | 50.00% |
| andrew morton | andrew morton | 4 | 11.76% | 1 | 50.00% |
| Total | 34 | 100.00% | 2 | 100.00% |
#endif
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| andrew morton | andrew morton | 87 | 69.05% | 1 | 25.00% |
| pekka j enberg | pekka j enberg | 30 | 23.81% | 1 | 25.00% |
| adrian bunk | adrian bunk | 8 | 6.35% | 1 | 25.00% |
| eric biggers | eric biggers | 1 | 0.79% | 1 | 25.00% |
| Total | 126 | 100.00% | 4 | 100.00% |
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