linux-kernel - [PATCH 15/16] writeback: add @gfp to wb

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Message-Id: <1420572557-11572-16-git-send-email-tj@kernel.org>
Date:	Tue,  6 Jan 2015 14:29:16 -0500
From:	Tejun Heo <tj@...nel.org>
To:	axboe@...nel.dk
Cc:	linux-kernel@...r.kernel.org, jack@...e.cz, hch@...radead.org,
	hannes@...xchg.org, linux-fsdevel@...r.kernel.org,
	vgoyal@...hat.com, lizefan@...wei.com, cgroups@...r.kernel.org,
	linux-mm@...ck.org, mhocko@...e.cz, Tejun Heo <tj@...nel.org>
Subject: [PATCH 15/16] writeback: add @gfp to wb_init()

wb_init() currently always uses GFP_KERNEL but the planned cgroup
writeback support needs using other allocation masks.  Add @gfp to
wb_init().

This patch doesn't introduce any behavior changes.

Signed-off-by: Tejun Heo <tj@...nel.org>
Cc: Jens Axboe <axboe@...nel.dk>
Cc: Jan Kara <jack@...e.cz>
---
 mm/backing-dev.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index a98a957..1c9b70e 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -342,7 +342,8 @@ void wb_wakeup_delayed(struct bdi_writeback *wb)
  */
 #define INIT_BW		(100 << (20 - PAGE_SHIFT))
 
-static int wb_init(struct bdi_writeback *wb, struct backing_dev_info *bdi)
+static int wb_init(struct bdi_writeback *wb, struct backing_dev_info *bdi,
+		   gfp_t gfp)
 {
 	int i, err;
 
@@ -365,12 +366,12 @@ static int wb_init(struct bdi_writeback *wb, struct backing_dev_info *bdi)
 	INIT_LIST_HEAD(&wb->work_list);
 	INIT_DELAYED_WORK(&wb->dwork, wb_workfn);
 
-	err = fprop_local_init_percpu(&wb->completions, GFP_KERNEL);
+	err = fprop_local_init_percpu(&wb->completions, gfp);
 	if (err)
 		return err;
 
 	for (i = 0; i < NR_WB_STAT_ITEMS; i++) {
-		err = percpu_counter_init(&wb->stat[i], 0, GFP_KERNEL);
+		err = percpu_counter_init(&wb->stat[i], 0, gfp);
 		if (err) {
 			while (--i)
 				percpu_counter_destroy(&wb->stat[i]);
@@ -450,7 +451,7 @@ int bdi_init(struct backing_dev_info *bdi)
 	bdi->max_prop_frac = FPROP_FRAC_BASE;
 	INIT_LIST_HEAD(&bdi->bdi_list);
 
-	err = wb_init(&bdi->wb, bdi);
+	err = wb_init(&bdi->wb, bdi, GFP_KERNEL);
 	if (err)
 		return err;
 
-- 
2.1.0

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