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dax: drop size parameter to ->direct_access() 

None of the implementations currently use it.  The common
bdev_direct_access() entry point handles all the size checks before
calling ->direct_access().

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams 2015-08-07 17:41:00 -04:00
parent 4a9bf88a5c
commit cb389b9c0e
6 changed files with 7 additions and 11 deletions
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2
arch/powerpc/sysdev/axonram.c
View File

@ -141,7 +141,7 @@ axon_ram_make_request(struct request_queue *queue, struct bio *bio)
*/
static long
axon_ram_direct_access(struct block_device *device, sector_t sector,
void __pmem **kaddr, unsigned long *pfn, long size)
void __pmem **kaddr, unsigned long *pfn)
{
struct axon_ram_bank *bank = device->bd_disk->private_data;
loff_t offset = (loff_t)sector << AXON_RAM_SECTOR_SHIFT;

6
drivers/block/brd.c
View File

@ -371,7 +371,7 @@ static int brd_rw_page(struct block_device *bdev, sector_t sector,
#ifdef CONFIG_BLK_DEV_RAM_DAX
static long brd_direct_access(struct block_device *bdev, sector_t sector,
void __pmem **kaddr, unsigned long *pfn, long size)
void __pmem **kaddr, unsigned long *pfn)
{
struct brd_device *brd = bdev->bd_disk->private_data;
struct page *page;
@ -384,10 +384,6 @@ static long brd_direct_access(struct block_device *bdev, sector_t sector,
*kaddr = (void __pmem *)page_address(page);
*pfn = page_to_pfn(page);
/*
* TODO: If size > PAGE_SIZE, we could look to see if the next page in
* the file happens to be mapped to the next page of physical RAM.
*/
return PAGE_SIZE;
}
#else

2
drivers/nvdimm/pmem.c
View File

@ -92,7 +92,7 @@ static int pmem_rw_page(struct block_device *bdev, sector_t sector,
}
static long pmem_direct_access(struct block_device *bdev, sector_t sector,
void __pmem **kaddr, unsigned long *pfn, long size)
void __pmem **kaddr, unsigned long *pfn)
{
struct pmem_device *pmem = bdev->bd_disk->private_data;
size_t offset = sector << 9;

4
drivers/s390/block/dcssblk.c
View File

@ -29,7 +29,7 @@ static int dcssblk_open(struct block_device *bdev, fmode_t mode);
static void dcssblk_release(struct gendisk *disk, fmode_t mode);
static void dcssblk_make_request(struct request_queue *q, struct bio *bio);
static long dcssblk_direct_access(struct block_device *bdev, sector_t secnum,
void __pmem **kaddr, unsigned long *pfn, long size);
void __pmem **kaddr, unsigned long *pfn);
static char dcssblk_segments[DCSSBLK_PARM_LEN] = "\0";
@ -879,7 +879,7 @@ fail:
static long
dcssblk_direct_access (struct block_device *bdev, sector_t secnum,
void __pmem **kaddr, unsigned long *pfn, long size)
void __pmem **kaddr, unsigned long *pfn)
{
struct dcssblk_dev_info *dev_info;
unsigned long offset, dev_sz;

2
fs/block_dev.c
View File

@ -462,7 +462,7 @@ long bdev_direct_access(struct block_device *bdev, sector_t sector,
sector += get_start_sect(bdev);
if (sector % (PAGE_SIZE / 512))
return -EINVAL;
avail = ops->direct_access(bdev, sector, addr, pfn, size);
avail = ops->direct_access(bdev, sector, addr, pfn);
if (!avail)
return -ERANGE;
return min(avail, size);

2
include/linux/blkdev.h
View File

@ -1556,7 +1556,7 @@ struct block_device_operations {
int (*ioctl) (struct block_device *, fmode_t, unsigned, unsigned long);
int (*compat_ioctl) (struct block_device *, fmode_t, unsigned, unsigned long);
long (*direct_access)(struct block_device *, sector_t, void __pmem **,
unsigned long *pfn, long size);
unsigned long *pfn);
unsigned int (*check_events) (struct gendisk *disk,
unsigned int clearing);
/* ->media_changed() is DEPRECATED, use ->check_events() instead */