[RFC PATCH 1/8] brd: use memcpy_from_page() in copy_from_brd()
From: Chaitanya Kulkarni <hidden>
Date: 2021-02-07 19:06:31
Also in:
linux-ext4, linux-f2fs-devel, linux-fsdevel
Subsystem:
block layer, ramdisk ram block device driver, the rest · Maintainers:
Jens Axboe, Linus Torvalds
Signed-off-by: Chaitanya Kulkarni <redacted> --- drivers/block/brd.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/drivers/block/brd.c b/drivers/block/brd.c
index cb5c872ac9b2..d41b7d489e9f 100644
--- a/drivers/block/brd.c
+++ b/drivers/block/brd.c@@ -226,11 +226,9 @@ static void copy_from_brd(void *dst, struct brd_device *brd, copy = min_t(size_t, n, PAGE_SIZE - offset); page = brd_lookup_page(brd, sector); - if (page) { - src = kmap_atomic(page); - memcpy(dst, src + offset, copy); - kunmap_atomic(src); - } else + if (page) + memcpy_from_page(dst, page, offset, copy); + else memset(dst, 0, copy); if (copy < n) {
--
2.22.1