mm: reuse DEFINE_SHOW_ATTRIBUTE() macro
...instead of open coding file operations followed by custom ->open()
callbacks per each attribute.
[andriy.shevchenko@linux.intel.com: add tags, fix compilation issue]
Link: http://lkml.kernel.org/r/20180217144253.58604-1-andriy.shevchenko@linux.intel.com
Link: http://lkml.kernel.org/r/20180214154644.54505-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Matthew Wilcox <mawilcox@microsoft.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Acked-by: Christoph Lameter <cl@linux.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Dennis Zhou <dennisszhou@gmail.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Nitin Gupta <ngupta@vflare.org>
Cc: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index b7f61cd..a583ab1 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -642,18 +642,7 @@ static int zs_stats_size_show(struct seq_file *s, void *v)
return 0;
}
-
-static int zs_stats_size_open(struct inode *inode, struct file *file)
-{
- return single_open(file, zs_stats_size_show, inode->i_private);
-}
-
-static const struct file_operations zs_stat_size_ops = {
- .open = zs_stats_size_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
+DEFINE_SHOW_ATTRIBUTE(zs_stats_size);
static void zs_pool_stat_create(struct zs_pool *pool, const char *name)
{
@@ -672,7 +661,7 @@ static void zs_pool_stat_create(struct zs_pool *pool, const char *name)
pool->stat_dentry = entry;
entry = debugfs_create_file("classes", S_IFREG | S_IRUGO,
- pool->stat_dentry, pool, &zs_stat_size_ops);
+ pool->stat_dentry, pool, &zs_stats_size_fops);
if (!entry) {
pr_warn("%s: debugfs file entry <%s> creation failed\n",
name, "classes");
