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ext4: remove page offset calculation in ext4_block_truncate_page()

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For bs <= ps scenarios, calculating the offset within the block is
sufficient. For bs > ps, an initial page offset calculation can lead to
incorrect behavior. Thus this redundant calculation has been removed.

Signed-off-by: Baokun Li <libaokun1@huawei.com>
Reviewed-by: Zhang Yi <yi.zhang@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Ojaswin Mujoo <ojaswin@linux.ibm.com>
Message-ID: <20251121090654.631996-3-libaokun@huaweicloud.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Baokun Li
2025-11-21 17:06:32 +08:00
committed by Theodore Ts'o
parent 5835b1339e
commit b73f45a324
1 changed files with 2 additions and 3 deletions
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5
fs/ext4/inode.c
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@@ -4193,7 +4193,6 @@ static int ext4_block_zero_page_range(handle_t *handle,
static int ext4_block_truncate_page(handle_t *handle,
struct address_space *mapping, loff_t from)
{
unsigned offset = from & (PAGE_SIZE-1);
unsigned length;
unsigned blocksize;
struct inode *inode = mapping->host;
@@ -4202,8 +4201,8 @@ static int ext4_block_truncate_page(handle_t *handle,
if (IS_ENCRYPTED(inode) && !fscrypt_has_encryption_key(inode))
return 0;
blocksize = inode->i_sb->s_blocksize;
length = blocksize - (offset & (blocksize - 1));
blocksize = i_blocksize(inode);
length = blocksize - (from & (blocksize - 1));
return ext4_block_zero_page_range(handle, mapping, from, length);
}