author: Linus Torvalds <torvalds@linux-foundation.org> 2016-07-28 17:22:07 -0700
committer: Linus Torvalds <torvalds@linux-foundation.org> 2016-07-28 17:38:16 -0700
commit: f0c98ebc57c2d5e535bc4f9167f35650d2ba3c90
parent: d94ba9e7d8d5c821d0442f13b30b0140c1109c38
Commit Summary:
Diffstat:
1 file changed, 4 insertions, 9 deletions
diff --git a/fs/dax.c b/fs/dax.c
index 432b9e6dd63b..993dc6fe0416 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -75,13 +75,13 @@ static long dax_map_atomic(struct block_device *bdev, struct blk_dax_ctl *dax)
struct request_queue *q = bdev->bd_queue;
long rc = -EIO;
- dax->addr = (void __pmem *) ERR_PTR(-EIO);
+ dax->addr = ERR_PTR(-EIO);
if (blk_queue_enter(q, true) != 0)
return rc;
rc = bdev_direct_access(bdev, dax);
if (rc < 0) {
- dax->addr = (void __pmem *) ERR_PTR(rc);
+ dax->addr = ERR_PTR(rc);
blk_queue_exit(q);
return rc;
}
@@ -147,12 +147,12 @@ static ssize_t dax_io(struct inode *inode, struct iov_iter *iter,
struct buffer_head *bh)
{
loff_t pos = start, max = start, bh_max = start;
- bool hole = false, need_wmb = false;
+ bool hole = false;
struct block_device *bdev = NULL;
int rw = iov_iter_rw(iter), rc;
long map_len = 0;
struct blk_dax_ctl dax = {
- .addr = (void __pmem *) ERR_PTR(-EIO),
+ .addr = ERR_PTR(-EIO),
};
unsigned blkbits = inode->i_blkbits;
sector_t file_blks = (i_size_read(inode) + (1 << blkbits) - 1)
@@ -218,7 +218,6 @@ static ssize_t dax_io(struct inode *inode, struct iov_iter *iter,
if (iov_iter_rw(iter) == WRITE) {
len = copy_from_iter_pmem(dax.addr, max - pos, iter);
- need_wmb = true;
} else if (!hole)
len = copy_to_iter((void __force *) dax.addr, max - pos,
iter);
@@ -235,8 +234,6 @@ static ssize_t dax_io(struct inode *inode, struct iov_iter *iter,
dax.addr += len;
}
- if (need_wmb)
- wmb_pmem();
dax_unmap_atomic(bdev, &dax);
return (pos == start) ? rc : pos - start;
@@ -788,7 +785,6 @@ int dax_writeback_mapping_range(struct address_space *mapping,
return ret;
}
}
- wmb_pmem();
return 0;
}
EXPORT_SYMBOL_GPL(dax_writeback_mapping_range);
@@ -1187,7 +1183,6 @@ int __dax_zero_page_range(struct block_device *bdev, sector_t sector,
if (dax_map_atomic(bdev, &dax) < 0)
return PTR_ERR(dax.addr);
clear_pmem(dax.addr + offset, length);
- wmb_pmem();
dax_unmap_atomic(bdev, &dax);
}
return 0;