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authorRoss Zwisler <ross.zwisler@linux.intel.com>2016-09-22 11:49:38 -0400
committerTheodore Ts'o <tytso@mit.edu>2016-09-22 11:49:38 -0400
commitcca32b7eeb4ea24fa6596650e06279ad9130af98 (patch)
treea73d8f4624a61f84251d921ff98156011b18328c /fs/ext4
parente03a9976afce6634826d56c33531dd10bb9a9166 (diff)
downloadlinux-cca32b7eeb4ea24fa6596650e06279ad9130af98.tar.bz2
ext4: allow DAX writeback for hole punch
Currently when doing a DAX hole punch with ext4 we fail to do a writeback. This is because the logic around filemap_write_and_wait_range() in ext4_punch_hole() only looks for dirty page cache pages in the radix tree, not for dirty DAX exceptional entries. Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com> Reviewed-by: Jan Kara <jack@suse.cz> Cc: <stable@vger.kernel.org> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/ext4')
-rw-r--r--fs/ext4/inode.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 9b464e5272bb..39883158b970 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -3892,7 +3892,7 @@ int ext4_update_disksize_before_punch(struct inode *inode, loff_t offset,
}
/*
- * ext4_punch_hole: punches a hole in a file by releaseing the blocks
+ * ext4_punch_hole: punches a hole in a file by releasing the blocks
* associated with the given offset and length
*
* @inode: File inode
@@ -3921,7 +3921,7 @@ int ext4_punch_hole(struct inode *inode, loff_t offset, loff_t length)
* Write out all dirty pages to avoid race conditions
* Then release them.
*/
- if (mapping->nrpages && mapping_tagged(mapping, PAGECACHE_TAG_DIRTY)) {
+ if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY)) {
ret = filemap_write_and_wait_range(mapping, offset,
offset + length - 1);
if (ret)