From e8df2c703d5d1a99cfc45124bfa6f5e1982e0166 Mon Sep 17 00:00:00 2001 From: YueHaibing 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 Reviewed-by: Andy Shevchenko Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- 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.