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Subject[PATCH 1/4] minixfs: use offset_in_page()
Date
It's cheaper and more idiomatic than subtracting page_address()
of the corresponding page...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/minix/dir.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/fs/minix/dir.c b/fs/minix/dir.c
index 62c313fc9a49..34a5d17f0796 100644
--- a/fs/minix/dir.c
+++ b/fs/minix/dir.c
@@ -268,7 +268,7 @@ int minix_add_link(struct dentry *dentry, struct inode *inode)
return -EINVAL;

got_it:
- pos = page_offset(page) + p - (char *)page_address(page);
+ pos = page_offset(page) + offset_in_page(p);
err = minix_prepare_chunk(page, pos, sbi->s_dirsize);
if (err)
goto out_unlock;
@@ -296,8 +296,7 @@ int minix_add_link(struct dentry *dentry, struct inode *inode)
int minix_delete_entry(struct minix_dir_entry *de, struct page *page)
{
struct inode *inode = page->mapping->host;
- char *kaddr = page_address(page);
- loff_t pos = page_offset(page) + (char*)de - kaddr;
+ loff_t pos = page_offset(page) + offset_in_page(de);
struct minix_sb_info *sbi = minix_sb(inode->i_sb);
unsigned len = sbi->s_dirsize;
int err;
@@ -421,8 +420,7 @@ int minix_set_link(struct minix_dir_entry *de, struct page *page,
{
struct inode *dir = page->mapping->host;
struct minix_sb_info *sbi = minix_sb(dir->i_sb);
- loff_t pos = page_offset(page) +
- (char *)de-(char*)page_address(page);
+ loff_t pos = page_offset(page) + offset_in_page(de);
int err;

lock_page(page);
--
2.39.2
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