From: YueHaibing <yuehaibing@xxxxxxxxxx> Subject: mm/compaction: use DEVICE_ATTR_WO macro Use DEVICE_ATTR_WO helper instead of plain DEVICE_ATTR, which makes the code a bit shorter and easier to read. Link: https://lkml.kernel.org/r/20210523064521.32912-1-yuehaibing@xxxxxxxxxx Signed-off-by: YueHaibing <yuehaibing@xxxxxxxxxx> Reviewed-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/compaction.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) --- a/mm/compaction.c~mm-compaction-use-device_attr_wo-macro +++ a/mm/compaction.c @@ -2722,9 +2722,9 @@ int sysctl_compaction_handler(struct ctl } #if defined(CONFIG_SYSFS) && defined(CONFIG_NUMA) -static ssize_t sysfs_compact_node(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t count) +static ssize_t compact_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) { int nid = dev->id; @@ -2737,7 +2737,7 @@ static ssize_t sysfs_compact_node(struct return count; } -static DEVICE_ATTR(compact, 0200, NULL, sysfs_compact_node); +static DEVICE_ATTR_WO(compact); int compaction_register_node(struct node *node) { _
