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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>
This commit is contained in:
Andy Shevchenko 2018-04-05 16:23:16 -07:00 committed by Linus Torvalds
parent 7f16f91fdf
commit 5ad3509364
4 changed files with 5 additions and 49 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
mm/backing-dev.c
View File

@ -100,18 +100,7 @@ static int bdi_debug_stats_show(struct seq_file *m, void *v)
return 0;
}
static int bdi_debug_stats_open(struct inode *inode, struct file *file)
{
return single_open(file, bdi_debug_stats_show, inode->i_private);
}
static const struct file_operations bdi_debug_stats_fops = {
.open = bdi_debug_stats_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
DEFINE_SHOW_ATTRIBUTE(bdi_debug_stats);
static int bdi_debug_register(struct backing_dev_info *bdi, const char *name)
{

13
mm/memblock.c
View File

@ -1795,18 +1795,7 @@ static int memblock_debug_show(struct seq_file *m, void *private)
}
return 0;
}
static int memblock_debug_open(struct inode *inode, struct file *file)
{
return single_open(file, memblock_debug_show, inode->i_private);
}
static const struct file_operations memblock_debug_fops = {
.open = memblock_debug_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
DEFINE_SHOW_ATTRIBUTE(memblock_debug);
static int __init memblock_init_debugfs(void)
{

13
mm/percpu-stats.c
View File

@ -223,18 +223,7 @@ static int percpu_stats_show(struct seq_file *m, void *v)
return 0;
}
static int percpu_stats_open(struct inode *inode, struct file *filp)
{
return single_open(filp, percpu_stats_show, NULL);
}
static const struct file_operations percpu_stats_fops = {
.open = percpu_stats_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
DEFINE_SHOW_ATTRIBUTE(percpu_stats);
static int __init init_percpu_stats_debugfs(void)
{

15
mm/zsmalloc.c
View File

@ -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");