As the function handles zeroing range only within one block, the
required changes are trivial, just remove assuption on page size.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
---
fs/ext4/inode.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 45822097d8c2..3df2cea763ce 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -3679,7 +3679,7 @@ static int __ext4_block_zero_page_range(handle_t *handle,
struct address_space *mapping, loff_t from, loff_t length)
{
ext4_fsblk_t index = from >> PAGE_SHIFT;
- unsigned offset = from & (PAGE_SIZE-1);
+ unsigned offset;
unsigned blocksize, pos;
ext4_lblk_t iblock;
struct inode *inode = mapping->host;
@@ -3692,6 +3692,9 @@ static int __ext4_block_zero_page_range(handle_t *handle,
if (!page)
return -ENOMEM;
+ page = compound_head(page);
+ offset = from & ~hpage_mask(page);
+
blocksize = inode->i_sb->s_blocksize;
iblock = index << (PAGE_SHIFT - inode->i_sb->s_blocksize_bits);
@@ -3746,7 +3749,7 @@ static int __ext4_block_zero_page_range(handle_t *handle,
if (err)
goto unlock;
}
- zero_user(page, offset, length);
+ zero_user(page + offset / PAGE_SIZE, offset % PAGE_SIZE, length);
BUFFER_TRACE(bh, "zeroed end of block");
if (ext4_should_journal_data(inode)) {
--
2.8.1
--
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