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Subject[PATCH v2 -next] mm/dmapool: use DEVICE_ATTR_RO macro
Date
Use DEVICE_ATTR_RO() helper instead of plain DEVICE_ATTR(),
which makes the code a bit shorter and easier to read.

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
v2: DEVICE_ATTR_RO -> DEVICE_ATTR_RO()
DEVICE_ATTR -> DEVICE_ATTR()

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.
--
2.17.1
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