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ext4: use memcpy_from_page() in pagecache_read()

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Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Link: https://lore.kernel.org/r/20210207190425.38107-6-chaitanya.kulkarni@wdc.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Chaitanya Kulkarni 2021-02-07 11:04:22 -08:00 committed by Theodore Ts'o
parent 0d02ec6b31
commit 4d93874b9e
1 changed files with 1 additions and 4 deletions
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5
fs/ext4/verity.c
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@ -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);