linux-kernel - [PATCH v2 01/10] drbd: reduce stack footprint in drbd_report_io

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Message-Id: <20210622174424.136960-2-warwish@yandex-team.ru>
Date:   Tue, 22 Jun 2021 20:44:15 +0300
From:   Anton Suvorov <warwish@...dex-team.ru>
To:     willy@...radead.org
Cc:     dmtrmonakhov@...dex-team.ru, linux-block@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        viro@...iv.linux.org.uk, warwish@...dex-team.ru
Subject: [PATCH v2 01/10] drbd: reduce stack footprint in drbd_report_io_error()

Stack usage reduced (measured with allyesconfig):

./drivers/block/drbd/drbd_req.c drbd_report_io_error    200     72      -128

Signed-off-by: Anton Suvorov <warwish@...dex-team.ru>
---
 drivers/block/drbd/drbd_req.c | 12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/drivers/block/drbd/drbd_req.c b/drivers/block/drbd/drbd_req.c
index 13beb98a7c5a..bd7265edf614 100644
--- a/drivers/block/drbd/drbd_req.c
+++ b/drivers/block/drbd/drbd_req.c
@@ -510,16 +510,14 @@ static void mod_rq_state(struct drbd_request *req, struct bio_and_error *m,
 
 static void drbd_report_io_error(struct drbd_device *device, struct drbd_request *req)
 {
-        char b[BDEVNAME_SIZE];
-
 	if (!__ratelimit(&drbd_ratelimit_state))
 		return;
 
-	drbd_warn(device, "local %s IO error sector %llu+%u on %s\n",
-			(req->rq_state & RQ_WRITE) ? "WRITE" : "READ",
-			(unsigned long long)req->i.sector,
-			req->i.size >> 9,
-			bdevname(device->ldev->backing_bdev, b));
+	drbd_warn(device, "local %s IO error sector %llu+%u on %pg\n",
+		  (req->rq_state & RQ_WRITE) ? "WRITE" : "READ",
+		  (unsigned long long)req->i.sector,
+		  req->i.size >> 9,
+		  device->ldev->backing_bdev);
 }
 
 /* Helper for HANDED_OVER_TO_NETWORK.
-- 
2.25.1