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| author | Allison Henderson <achender@linux.vnet.ibm.com> | 2011-05-25 07:41:32 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2011-05-25 07:41:32 -0400 |
| commit | 308488518dfcbe3be250085cd582f5b0c1ce72a9 (patch) | |
| tree | 4696b50debf9794f2cbb966cccbedadb93dc996a /fs/ext4/ext4.h | |
| parent | 55f020db66ce187fb8c8e4002a94b0eb714da450 (diff) | |
| download | blackbird-op-linux-308488518dfcbe3be250085cd582f5b0c1ce72a9.tar.gz blackbird-op-linux-308488518dfcbe3be250085cd582f5b0c1ce72a9.zip | |
ext4: add new function ext4_block_zero_page_range()
This patch modifies the existing ext4_block_truncate_page() function
which was used by the truncate code path, and which zeroes out block
unaligned data, by adding a new length parameter, and renames it to
ext4_block_zero_page_rage(). This function can now be used to zero out the
head of a block, the tail of a block, or the middle
of a block.
The ext4_block_truncate_page() function is now a wrapper to
ext4_block_zero_page_range().
[ext4 punch hole patch series 2/5 v7]
Signed-off-by: Allison Henderson <achender@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Mingming Cao <cmm@us.ibm.com>
Diffstat (limited to 'fs/ext4/ext4.h')
| -rw-r--r-- | fs/ext4/ext4.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 2f310d1839ed..c48f9db5b96b 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -1825,6 +1825,8 @@ extern int ext4_writepage_trans_blocks(struct inode *); extern int ext4_chunk_trans_blocks(struct inode *, int nrblocks); extern int ext4_block_truncate_page(handle_t *handle, struct address_space *mapping, loff_t from); +extern int ext4_block_zero_page_range(handle_t *handle, + struct address_space *mapping, loff_t from, loff_t length); extern int ext4_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf); extern qsize_t *ext4_get_reserved_space(struct inode *inode); extern void ext4_da_update_reserve_space(struct inode *inode, |
