#include <linux/blk-mq.h>
#include <linux/part_stat.h>
#include <linux/blk-crypto.h>
+#include <linux/memblock.h> /* for max_pfn/max_low_pfn */
#include <xen/xen.h>
#include "blk-crypto-internal.h"
#include "blk-mq.h"
static inline void blk_throtl_stat_add(struct request *rq, u64 time) { }
#endif
-#ifdef CONFIG_BOUNCE
-extern int init_emergency_isa_pool(void);
-extern void blk_queue_bounce(struct request_queue *q, struct bio **bio);
-#else
-static inline int init_emergency_isa_pool(void)
+void __blk_queue_bounce(struct request_queue *q, struct bio **bio);
+
+static inline bool blk_queue_may_bounce(struct request_queue *q)
{
- return 0;
+ return IS_ENABLED(CONFIG_BOUNCE) &&
+ q->limits.bounce == BLK_BOUNCE_HIGH &&
+ max_low_pfn >= max_pfn;
}
+
static inline void blk_queue_bounce(struct request_queue *q, struct bio **bio)
{
+ if (unlikely(blk_queue_may_bounce(q) && bio_has_data(*bio)))
+ __blk_queue_bounce(q, bio);
}
-#endif /* CONFIG_BOUNCE */
#ifdef CONFIG_BLK_CGROUP_IOLATENCY
extern int blk_iolatency_init(struct request_queue *q);
#define ADDPART_FLAG_NONE 0
#define ADDPART_FLAG_RAID 1
#define ADDPART_FLAG_WHOLEDISK 2
-void delete_partition(struct block_device *part);
int bdev_add_partition(struct block_device *bdev, int partno,
sector_t start, sector_t length);
int bdev_del_partition(struct block_device *bdev, int partno);