queue_limit_discard_alignment

Name:queue_limit_discard_alignment

Proto:static inline int queue_limit_discard_alignment(struct queue_limits *lim, sector_t sector)

Type:int

Parameter:

Type	Parameter	Name
struct queue_limits *	lim
sector_t	sector

1381

If Not max_discard_sectors Then Return 0

1385

alignment = discard_alignment >> The basic unit of block I/O is a sector. It is used in a number of contexts* in Linux (blk, bio, genhd). The size of one sector is 512 = 2**9* bytes. Variables of type sector_t represent an offset or size that is a* multiple of 512 bytes

1386

granularity = discard_granularity >> The basic unit of block I/O is a sector. It is used in a number of contexts* in Linux (blk, bio, genhd). The size of one sector is 512 = 2**9* bytes. Variables of type sector_t represent an offset or size that is a* multiple of 512 bytes

1387

If Not granularity Then Return 0

1391

offset = sector_div(sector, granularity)

1394

offset = ( granularity + alignment - offset) % granularity

1397

Return offset << The basic unit of block I/O is a sector. It is used in a number of contexts* in Linux (blk, bio, genhd). The size of one sector is 512 = 2**9* bytes. Variables of type sector_t represent an offset or size that is a* multiple of 512 bytes

**Caller**
Name	Describe
blk_stack_limits	adjust queue_limits for stacked devices
add_partition	Must be called either with bd_mutex held, before a disk can be opened or* after all disk users are gone.

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