From: Coly Li Date: Fri, 2 Oct 2020 08:27:32 +0000 (+0800) Subject: drbd: code cleanup by using sendpage_ok() to check page for kernel_sendpage() X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=fb25ebe1b212c37781b23a7f7cd21c0bb2f6eb83;p=linux.git drbd: code cleanup by using sendpage_ok() to check page for kernel_sendpage() In _drbd_send_page() a page is checked by following code before sending it by kernel_sendpage(), (page_count(page) < 1) || PageSlab(page) If the check is true, this page won't be send by kernel_sendpage() and handled by sock_no_sendpage(). This kind of check is exactly what macro sendpage_ok() does, which is introduced into include/linux/net.h to solve a similar send page issue in nvme-tcp code. This patch uses macro sendpage_ok() to replace the open coded checks to page type and refcount in _drbd_send_page(), as a code cleanup. Signed-off-by: Coly Li Cc: Philipp Reisner Cc: Sagi Grimberg Signed-off-by: David S. Miller --- diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c index 04b6bde9419d2..573dbf6f0c31c 100644 --- a/drivers/block/drbd/drbd_main.c +++ b/drivers/block/drbd/drbd_main.c @@ -1553,7 +1553,7 @@ static int _drbd_send_page(struct drbd_peer_device *peer_device, struct page *pa * put_page(); and would cause either a VM_BUG directly, or * __page_cache_release a page that would actually still be referenced * by someone, leading to some obscure delayed Oops somewhere else. */ - if (drbd_disable_sendpage || (page_count(page) < 1) || PageSlab(page)) + if (drbd_disable_sendpage || !sendpage_ok(page)) return _drbd_no_send_page(peer_device, page, offset, size, msg_flags); msg_flags |= MSG_NOSIGNAL;