diff options
| author | Dan Williams <dan.j.williams@intel.com> | 2017-01-27 14:13:15 -0800 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2017-04-25 13:20:46 -0700 |
| commit | a41fe02b6bba853a29c864d00fd161bbe6cfc715 (patch) | |
| tree | 7060e9ed2234c8b6b2cc99523f18ed66bddba33a /fs | |
| parent | fa5d932c323e8e0d9b24b3517997d15b36d1607d (diff) | |
| download | linux-0-day-a41fe02b6bba853a29c864d00fd161bbe6cfc715.tar.gz linux-0-day-a41fe02b6bba853a29c864d00fd161bbe6cfc715.tar.xz | |
Revert "block: use DAX for partition table reads"
commit d1a5f2b4d8a1 ("block: use DAX for partition table reads") was
part of a stalled effort to allow dax mappings of block devices. Since
then the device-dax mechanism has filled the role of dax-mapping static
device ranges.
Now that we are moving ->direct_access() from a block_device operation
to a dax_inode operation we would need block devices to map and carry
their own dax_inode reference.
Unless / until we decide to revive dax mapping of raw block devices
through the dax_inode scheme, there is no need to carry
read_dax_sector(). Its removal in turn allows for the removal of
bdev_direct_access() and should have been included in commit
223757016837 ("block_dev: remove DAX leftovers").
Cc: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/dax.c | 20 |
1 files changed, 0 insertions, 20 deletions
diff --git a/fs/dax.c b/fs/dax.c index de622d4282a65..b78a6947c4f52 100644 --- a/fs/dax.c +++ b/fs/dax.c @@ -101,26 +101,6 @@ static int dax_is_empty_entry(void *entry) return (unsigned long)entry & RADIX_DAX_EMPTY; } -struct page *read_dax_sector(struct block_device *bdev, sector_t n) -{ - struct page *page = alloc_pages(GFP_KERNEL, 0); - struct blk_dax_ctl dax = { - .size = PAGE_SIZE, - .sector = n & ~((((int) PAGE_SIZE) / 512) - 1), - }; - long rc; - - if (!page) - return ERR_PTR(-ENOMEM); - - rc = dax_map_atomic(bdev, &dax); - if (rc < 0) - return ERR_PTR(rc); - memcpy_from_pmem(page_address(page), dax.addr, PAGE_SIZE); - dax_unmap_atomic(bdev, &dax); - return page; -} - /* * DAX radix tree locking */ |