https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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Tip revision: 418baf2c28f3473039f2f7377760bd8f6897ae18 authored by Linus Torvalds on 22 November 2020, 23:36:08 UTC
Linux 5.10-rc5
Linux 5.10-rc5
Tip revision: 418baf2
dm-stats.h
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef DM_STATS_H
#define DM_STATS_H
#include <linux/types.h>
#include <linux/mutex.h>
#include <linux/list.h>
int dm_statistics_init(void);
void dm_statistics_exit(void);
struct dm_stats {
struct mutex mutex;
struct list_head list; /* list of struct dm_stat */
struct dm_stats_last_position __percpu *last;
sector_t last_sector;
unsigned last_rw;
};
struct dm_stats_aux {
bool merged;
unsigned long long duration_ns;
};
void dm_stats_init(struct dm_stats *st);
void dm_stats_cleanup(struct dm_stats *st);
struct mapped_device;
int dm_stats_message(struct mapped_device *md, unsigned argc, char **argv,
char *result, unsigned maxlen);
void dm_stats_account_io(struct dm_stats *stats, unsigned long bi_rw,
sector_t bi_sector, unsigned bi_sectors, bool end,
unsigned long duration_jiffies,
struct dm_stats_aux *aux);
static inline bool dm_stats_used(struct dm_stats *st)
{
return !list_empty(&st->list);
}
#endif