From: "haiqing.shq" <leviathan0992@xxxxxxxxx> Subject: mm/filemap.c: Use existing variable Use the variable write_len instead of ov_iter_count(from). Link: http://lkml.kernel.org/r/1537375855-2088-1-git-send-email-leviathan0992@xxxxxxxxx Signed-off-by: haiqing.shq <leviathan0992@xxxxxxxxx> Reviewed-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Cc: Jan Kara <jack@xxxxxxx> Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/filemap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/mm/filemap.c~mm-filemapc-use-existing-variable +++ a/mm/filemap.c @@ -3027,7 +3027,7 @@ generic_file_direct_write(struct kiocb * if (iocb->ki_flags & IOCB_NOWAIT) { /* If there are pages to writeback, return */ if (filemap_range_has_page(inode->i_mapping, pos, - pos + iov_iter_count(from))) + pos + write_len)) return -EAGAIN; } else { written = filemap_write_and_wait_range(mapping, pos, _
