Re: [RFC PATCH 8/8] f2fs: use memcpy_to_page() in pagecache_write()

Eric Biggers
2021-02-10T18:05:07Z

On Sun, Feb 07, 2021 at 11:04:25AM -0800, Chaitanya Kulkarni wrote:
> Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>

No explanation in commit message? There isn't much explanation needed for this,
but there should be at least one sentence.

Likewise for the other patches.

> fs/f2fs/verity.c | 5 +----
> 1 file changed, 1 insertion(+), 4 deletions(-)
>
> diff --git a/fs/f2fs/verity.c b/fs/f2fs/verity.c
> index 44e057bdc416..ca019685a944 100644
> --- a/fs/f2fs/verity.c
> +++ b/fs/f2fs/verity.c
> @@ -79,7 +79,6 @@ static int pagecache_write(struct inode *inode, const void *buf, size_t count,
> PAGE_SIZE - offset_in_page(pos));
> struct page *page;
> void *fsdata;
> - void *addr;
> int res;
>
> res = pagecache_write_begin(NULL, inode->i_mapping, pos, n, 0,
> @@ -87,9 +86,7 @@ static int pagecache_write(struct inode *inode, const void *buf, size_t count,
> if (res)
> return res;
>
> - addr = kmap_atomic(page);
> - memcpy(addr + offset_in_page(pos), buf, n);
> - kunmap_atomic(addr);
> + memcpy_to_page(page, offset_in_page(pos) buf, n);

This is missing a comma between 'offset_in_page(pos)' and 'buf'.

Otherwise the patches to fs/{ext4,f2fs}/verity.c look fine; thanks for doing
this!

- Eric