[RFC PATCH 5/8] ext4: use memcpy_from_page() in pagecache_read()

Chaitanya Kulkarni
2021-02-07T19:07:06Z

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
---
fs/ext4/verity.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/fs/ext4/verity.c b/fs/ext4/verity.c
index 5b7ba8f71153..c8e07f8a792d 100644
--- a/fs/ext4/verity.c
+++ b/fs/ext4/verity.c
@@ -45,16 +45,13 @@ static int pagecache_read(struct inode *inode, void *buf, size_t count,
size_t n = min_t(size_t, count,
PAGE_SIZE - offset_in_page(pos));
struct page *page;
- void *addr;

page = read_mapping_page(inode->i_mapping, pos >> PAGE_SHIFT,
NULL);
if (IS_ERR(page))
return PTR_ERR(page);

- addr = kmap_atomic(page);
- memcpy(buf, addr + offset_in_page(pos), n);
- kunmap_atomic(addr);
+ memcpy_from_page(buf, page, offset_in_page(pos), n);

put_page(page);

--
2.22.1