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Index of /FSS-OZR/root/lib/python3.9/site-packages/pip/_internal/utils
Index of /FSS-OZR/root/lib/python3.9/site-packages/pip/_internal/utils
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└BШ©©ал +╫ -/* SPDX-License-Identifier: GPL-2.0 */
/*
* include/linux/backing-dev.h
*
* low-level device information and state which is propagated up through
* to high-level code.
*/
#ifndef _LINUX_BACKING_DEV_H
#define _LINUX_BACKING_DEV_H
#include
#include
#include
#include
#include
#include
#include
static inline struct backing_dev_info *bdi_get(struct backing_dev_info *bdi)
{
kref_get(&bdi->refcnt);
return bdi;
}
struct backing_dev_info *bdi_get_by_id(u64 id);
void bdi_put(struct backing_dev_info *bdi);
__printf(2, 3)
int bdi_register(struct backing_dev_info *bdi, const char *fmt, ...);
__printf(2, 0)
int bdi_register_va(struct backing_dev_info *bdi, const char *fmt,
va_list args);
void bdi_set_owner(struct backing_dev_info *bdi, struct device *owner);
void bdi_unregister(struct backing_dev_info *bdi);
struct backing_dev_info *bdi_alloc(int node_id);
void wb_start_background_writeback(struct bdi_writeback *wb);
void wb_workfn(struct work_struct *work);
void wb_wakeup_delayed(struct bdi_writeback *wb);
void wb_wait_for_completion(struct wb_completion *done);
extern spinlock_t bdi_lock;
extern struct list_head bdi_list;
extern struct workqueue_struct *bdi_wq;
extern struct workqueue_struct *bdi_async_bio_wq;
static inline bool wb_has_dirty_io(struct bdi_writeback *wb)
{
return test_bit(WB_has_dirty_io, &wb->state);
}
static inline bool bdi_has_dirty_io(struct backing_dev_info *bdi)
{
/*
* @bdi->tot_write_bandwidth is guaranteed to be > 0 if there are
* any dirty wbs. See wb_update_write_bandwidth().
*/
return atomic_long_read(&bdi->tot_write_bandwidth);
}
static inline void wb_stat_mod(struct bdi_writeback *wb,
enum wb_stat_item item, s64 amount)
{
percpu_counter_add_batch(&wb->stat[item], amount, WB_STAT_BATCH);
}
static inline void inc_wb_stat(struct bdi_writeback *wb, enum wb_stat_item item)
{
wb_stat_mod(wb, item, 1);
}
static inline void dec_wb_stat(struct bdi_writeback *wb, enum wb_stat_item item)
{
wb_stat_mod(wb, item, -1);
}
static inline s64 wb_stat(struct bdi_writeback *wb, enum wb_stat_item item)
{
return percpu_counter_read_positive(&wb->stat[item]);
}
static inline s64 wb_stat_sum(struct bdi_writeback *wb, enum wb_stat_item item)
{
return percpu_counter_sum_positive(&wb->stat[item]);
}
extern void wb_writeout_inc(struct bdi_writeback *wb);
/*
* maximal error of a stat counter.
*/
static inline unsigned long wb_stat_error(void)
{
#ifdef CONFIG_SMP
return nr_cpu_ids * WB_STAT_BATCH;
#else
return 1;
#endif
}
/* BDI ratio is expressed as part per 1000000 for finer granularity. */
#define BDI_RATIO_SCALE 10000
u64 bdi_get_min_bytes(struct backing_dev_info *bdi);
u64 bdi_get_max_bytes(struct backing_dev_info *bdi);
int bdi_set_min_ratio(struct backing_dev_info *bdi, unsigned int min_ratio);
int bdi_set_max_ratio(struct backing_dev_info *b