[PATCH] fs: iomap: Replace bio_add_page with __bio_add_page in iomap_add_to_ioend

[chenlei0x@gmail.com]

From: Lei Chen <lennychen@tencent.com>

iomap_add_to_ioend append page on wpc->ioend->io_bio. If io_bio is full,
iomap_chain_bio will allocate a new bio. So when bio_add_page is called,
pages is guaranteed to be appended into wpc->ioend->io_bio. So we do not
need to check if page can be merged. Thus it's a faster way to directly
call __bio_add_page.

Signed-off-by: Lei Chen <lennychen@tencent.com>
---
 fs/iomap/buffered-io.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c
index 10cc797..7a0631a 100644
--- a/fs/iomap/buffered-io.c
+++ b/fs/iomap/buffered-io.c
@@ -1310,7 +1310,7 @@ static void iomap_writepage_end_bio(struct bio *bio)
 			wpc->ioend->io_bio =
 				iomap_chain_bio(wpc->ioend->io_bio);
 		}
-		bio_add_page(wpc->ioend->io_bio, page, len, poff);
+		__bio_add_page(wpc->ioend->io_bio, page, len, poff);
 	}
 
 	wpc->ioend->io_size += len;
-- 
1.8.3.1