From e8df2c703d5d1a99cfc45124bfa6f5e1982e0166 Mon Sep 17 00:00:00 2001
From: YueHaibing <yuehaibing@huawei.com>
Date: Mon, 28 Jun 2021 19:40:05 -0700
Subject: [PATCH] mm/dmapool: use DEVICE_ATTR_RO macro
Use DEVICE_ATTR_RO() helper instead of plain DEVICE_ATTR(), which makes
the code a bit shorter and easier to read.
Link: https://lkml.kernel.org/r/20210524112852.34716-1-yuehaibing@huawei.com
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
mm/dmapool.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/mm/dmapool.c b/mm/dmapool.c
index 16483f86360e..64b537b3ccb0 100644
--- a/mm/dmapool.c
+++ b/mm/dmapool.c
@@ -62,8 +62,7 @@ struct dma_page { /* cacheable header for 'allocation' bytes */
static DEFINE_MUTEX(pools_lock);
static DEFINE_MUTEX(pools_reg_lock);
-static ssize_t
-show_pools(struct device *dev, struct device_attribute *attr, char *buf)
+static ssize_t pools_show(struct device *dev, struct device_attribute *attr, char *buf)
{
unsigned temp;
unsigned size;
@@ -103,7 +102,7 @@ show_pools(struct device *dev, struct device_attribute *attr, char *buf)
return PAGE_SIZE - size;
}
-static DEVICE_ATTR(pools, 0444, show_pools, NULL);
+static DEVICE_ATTR_RO(pools);
/**
* dma_pool_create - Creates a pool of consistent memory blocks, for dma.