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From:   Keith Busch <kbusch@meta.com>
To:     <linux-mm@kvack.org>, <linux-kernel@vger.kernel.org>,
        Matthew Wilcox <willy@infradead.org>,
        Christoph Hellwig <hch@lst.de>
CC:     Tony Battersby <tonyb@cybernetics.com>,
        Kernel Team <kernel-team@meta.com>,
        Keith Busch <kbusch@kernel.org>
Subject: [PATCHv3 03/12] dmapool: use sysfs_emit() instead of scnprintf()
Date:   Tue, 3 Jan 2023 11:15:42 -0800
Message-ID: <20230103191551.3254778-4-kbusch@meta.com>
In-Reply-To: <20230103191551.3254778-1-kbusch@meta.com>
References: <20230103191551.3254778-1-kbusch@meta.com>
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From: Tony Battersby <tonyb@cybernetics.com>

Use sysfs_emit instead of scnprintf, snprintf or sprintf.

Signed-off-by: Tony Battersby <tonyb@cybernetics.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
 mm/dmapool.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/mm/dmapool.c b/mm/dmapool.c
index 559207e1c3339..20616b760bb9c 100644
--- a/mm/dmapool.c
+++ b/mm/dmapool.c
@@ -64,18 +64,11 @@ static DEFINE_MUTEX(pools_reg_lock);
=20
 static ssize_t pools_show(struct device *dev, struct device_attribute *a=
ttr, char *buf)
 {
-	unsigned temp;
-	unsigned size;
-	char *next;
+	int size;
 	struct dma_page *page;
 	struct dma_pool *pool;
=20
-	next =3D buf;
-	size =3D PAGE_SIZE;
-
-	temp =3D scnprintf(next, size, "poolinfo - 0.1\n");
-	size -=3D temp;
-	next +=3D temp;
+	size =3D sysfs_emit(buf, "poolinfo - 0.1\n");
=20
 	mutex_lock(&pools_lock);
 	list_for_each_entry(pool, &dev->dma_pools, pools) {
@@ -90,16 +83,14 @@ static ssize_t pools_show(struct device *dev, struct =
device_attribute *attr, cha
 		spin_unlock_irq(&pool->lock);
=20
 		/* per-pool info, no real statistics yet */
-		temp =3D scnprintf(next, size, "%-16s %4u %4zu %4zu %2u\n",
-				 pool->name, blocks,
-				 pages * (pool->allocation / pool->size),
-				 pool->size, pages);
-		size -=3D temp;
-		next +=3D temp;
+		size +=3D sysfs_emit_at(buf, size, "%-16s %4u %4zu %4zu %2u\n",
+				      pool->name, blocks,
+				      pages * (pool->allocation / pool->size),
+				      pool->size, pages);
 	}
 	mutex_unlock(&pools_lock);
=20
-	return PAGE_SIZE - size;
+	return size;
 }
=20
 static DEVICE_ATTR_RO(pools);
--=20
2.30.2