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mm/dmapool: use DEVICE_ATTR_RO macro

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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>
This commit is contained in:
YueHaibing 2021-06-28 19:40:05 -07:00 committed by Linus Torvalds
parent f4c1ab0937
commit e8df2c703d
1 changed files with 2 additions and 3 deletions
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5
mm/dmapool.c
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@ -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.