Use the offset_in_page() helper because it is more suitable than doing
explicit subtractions between pointers to directory entries and kernel
virtual addresses of mapped pages.
Cc: Ira Weiny <[email protected]>
Suggested-by: Al Viro <[email protected]>
Signed-off-by: Fabio M. De Francesco <[email protected]>
---
fs/ufs/dir.c | 12 +++++-------
1 file changed, 5 insertions(+), 7 deletions(-)
diff --git a/fs/ufs/dir.c b/fs/ufs/dir.c
index 391efaf1d528..69f78583c9c1 100644
--- a/fs/ufs/dir.c
+++ b/fs/ufs/dir.c
@@ -87,8 +87,7 @@ void ufs_set_link(struct inode *dir, struct ufs_dir_entry *de,
struct page *page, struct inode *inode,
bool update_times)
{
- loff_t pos = page_offset(page) +
- (char *) de - (char *) page_address(page);
+ loff_t pos = page_offset(page) + offset_in_page(de);
unsigned len = fs16_to_cpu(dir->i_sb, de->d_reclen);
int err;
@@ -371,8 +370,7 @@ int ufs_add_link(struct dentry *dentry, struct inode *inode)
return -EINVAL;
got_it:
- pos = page_offset(page) +
- (char*)de - (char*)page_address(page);
+ pos = page_offset(page) + offset_in_page(de);
err = ufs_prepare_chunk(page, pos, rec_len);
if (err)
goto out_unlock;
@@ -497,8 +495,8 @@ int ufs_delete_entry(struct inode *inode, struct ufs_dir_entry *dir,
{
struct super_block *sb = inode->i_sb;
char *kaddr = page_address(page);
- unsigned from = ((char*)dir - kaddr) & ~(UFS_SB(sb)->s_uspi->s_dirblksize - 1);
- unsigned to = ((char*)dir - kaddr) + fs16_to_cpu(sb, dir->d_reclen);
+ unsigned int from = offset_in_page(dir) & ~(UFS_SB(sb)->s_uspi->s_dirblksize - 1);
+ unsigned int to = offset_in_page(dir) + fs16_to_cpu(sb, dir->d_reclen);
loff_t pos;
struct ufs_dir_entry *pde = NULL;
struct ufs_dir_entry *de = (struct ufs_dir_entry *) (kaddr + from);
@@ -522,7 +520,7 @@ int ufs_delete_entry(struct inode *inode, struct ufs_dir_entry *dir,
de = ufs_next_entry(sb, de);
}
if (pde)
- from = (char*)pde - (char*)page_address(page);
+ from = offset_in_page(pde);
pos = page_offset(page) + from;
lock_page(page);
--
2.39.0