linux-kernel - [PATCH 13/32] mm: prepare for bi

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Date:	Wed,  4 Nov 2015 16:08:10 -0600
From:	mchristi@...hat.com
To:	linux-fsdevel@...r.kernel.org, dm-devel@...hat.com,
	linux-raid@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-scsi@...r.kernel.org, drbd-dev@...ts.linbit.com
Cc:	Mike Christie <mchristi@...hat.com>
Subject: [PATCH 13/32] mm: prepare for bi_rw split

From: Mike Christie <mchristi@...hat.com>

This patch prepares mm's submit_bio use for the next
patches that split bi_rw into a operation and flags field.
Instead of passing in a bitmap with both the operation and
flags mixed in, the callers will now pass them in seperately.

This patch modifies the code related to the submit_bio calls
so the flags and operation are seperated. When this is done
for all code, one of the later patches in the series will
the actual submit_bio call, so the patches are bisectable.

Signed-off-by: Mike Christie <mchristi@...hat.com>
---
 mm/page_io.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/mm/page_io.c b/mm/page_io.c
index b995a5b..ec7ad22 100644
--- a/mm/page_io.c
+++ b/mm/page_io.c
@@ -253,7 +253,8 @@ int __swap_writepage(struct page *page, struct writeback_control *wbc,
 		bio_end_io_t end_write_func)
 {
 	struct bio *bio;
-	int ret, rw = WRITE;
+	int ret;
+	u32 op_flags = 0;
 	struct swap_info_struct *sis = page_swap_info(page);
 
 	if (sis->flags & SWP_FILE) {
@@ -312,11 +313,11 @@ int __swap_writepage(struct page *page, struct writeback_control *wbc,
 		goto out;
 	}
 	if (wbc->sync_mode == WB_SYNC_ALL)
-		rw |= REQ_SYNC;
+		op_flags |= REQ_SYNC;
 	count_vm_event(PSWPOUT);
 	set_page_writeback(page);
 	unlock_page(page);
-	submit_bio(rw, bio);
+	submit_bio(REQ_OP_WRITE | op_flags, bio);
 out:
 	return ret;
 }
-- 
1.8.3.1

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