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Message-ID: <20150813030114.36703.27957.stgit@otcpl-skl-sds-2.jf.intel.com>
Date: Wed, 12 Aug 2015 23:01:14 -0400
From: Dan Williams <dan.j.williams@...el.com>
To: linux-kernel@...r.kernel.org
Cc: axboe@...nel.dk, riel@...hat.com, linux-nvdimm@...ts.01.org,
linux-mm@...ck.org, mgorman@...e.de, torvalds@...ux-foundation.org,
hch@....de
Subject: [PATCH v5 3/5] 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@....de>
Signed-off-by: Dan Williams <dan.j.williams@...el.com>
---
arch/powerpc/sysdev/axonram.c | 2 +-
drivers/block/brd.c | 6 +-----
drivers/nvdimm/pmem.c | 2 +-
drivers/s390/block/dcssblk.c | 4 ++--
fs/block_dev.c | 2 +-
include/linux/blkdev.h | 2 +-
6 files changed, 7 insertions(+), 11 deletions(-)
diff --git a/arch/powerpc/sysdev/axonram.c b/arch/powerpc/sysdev/axonram.c
index ee90db17b097..e8657d3bc588 100644
--- a/arch/powerpc/sysdev/axonram.c
+++ b/arch/powerpc/sysdev/axonram.c
@@ -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 **kaddr, unsigned long *pfn, long size)
+ void **kaddr, unsigned long *pfn)
{
struct axon_ram_bank *bank = device->bd_disk->private_data;
loff_t offset = (loff_t)sector << AXON_RAM_SECTOR_SHIFT;
diff --git a/drivers/block/brd.c b/drivers/block/brd.c
index 64ab4951e9d6..41528857c70d 100644
--- a/drivers/block/brd.c
+++ b/drivers/block/brd.c
@@ -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 **kaddr, unsigned long *pfn, long size)
+ void **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 = 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
diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c
index eb7552d939e1..5e019a6942ce 100644
--- a/drivers/nvdimm/pmem.c
+++ b/drivers/nvdimm/pmem.c
@@ -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 **kaddr, unsigned long *pfn, long size)
+ void **kaddr, unsigned long *pfn)
{
struct pmem_device *pmem = bdev->bd_disk->private_data;
size_t offset = sector << 9;
diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c
index da212813f2d5..2f1734ba0e22 100644
--- a/drivers/s390/block/dcssblk.c
+++ b/drivers/s390/block/dcssblk.c
@@ -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 **kaddr, unsigned long *pfn, long size);
+ void **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 **kaddr, unsigned long *pfn, long size)
+ void **kaddr, unsigned long *pfn)
{
struct dcssblk_dev_info *dev_info;
unsigned long offset, dev_sz;
diff --git a/fs/block_dev.c b/fs/block_dev.c
index 198243717da5..3a8ac7edfbf4 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -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);
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index d4068c17d0df..ff47d5498133 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -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 **, unsigned long *pfn, long size);
+ void **, unsigned long *pfn);
unsigned int (*check_events) (struct gendisk *disk,
unsigned int clearing);
/* ->media_changed() is DEPRECATED, use ->check_events() instead */
--
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