+ mm-re-use-define_show_attribute-macro.patch added to -mm tree

[akpm@linux-foundation.org]

The patch titled
     Subject: mm: reuse DEFINE_SHOW_ATTRIBUTE() macro
has been added to the -mm tree.  Its filename is
     mm-re-use-define_show_attribute-macro.patch

This patch should soon appear at
    http://ozlabs.org/~akpm/mmots/broken-out/mm-re-use-define_show_attribute-macro.patch
and later at
    http://ozlabs.org/~akpm/mmotm/broken-out/mm-re-use-define_show_attribute-macro.patch

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------------------------------------------------------
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Subject: mm: reuse DEFINE_SHOW_ATTRIBUTE() macro

...instead of open coding file operations followed by custom ->open()
callbacks per each attribute.

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>
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>
---

 mm/backing-dev.c  |   12 +-----------
 mm/memblock.c     |   12 +-----------
 mm/percpu-stats.c |   12 +-----------
 mm/zsmalloc.c     |   12 +-----------
 4 files changed, 4 insertions(+), 44 deletions(-)

diff -puN mm/backing-dev.c~mm-re-use-define_show_attribute-macro mm/backing-dev.c
--- a/mm/backing-dev.c~mm-re-use-define_show_attribute-macro
+++ a/mm/backing-dev.c
@@ -101,17 +101,7 @@ static int bdi_debug_stats_show(struct s
 	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)
 {
diff -puN mm/memblock.c~mm-re-use-define_show_attribute-macro mm/memblock.c
--- a/mm/memblock.c~mm-re-use-define_show_attribute-macro
+++ a/mm/memblock.c
@@ -1824,17 +1824,7 @@ static int memblock_debug_show(struct se
 	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)
 {
diff -puN mm/percpu-stats.c~mm-re-use-define_show_attribute-macro mm/percpu-stats.c
--- a/mm/percpu-stats.c~mm-re-use-define_show_attribute-macro
+++ a/mm/percpu-stats.c
@@ -224,17 +224,7 @@ alloc_buffer:
 	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)
 {
diff -puN mm/zsmalloc.c~mm-re-use-define_show_attribute-macro mm/zsmalloc.c
--- a/mm/zsmalloc.c~mm-re-use-define_show_attribute-macro
+++ a/mm/zsmalloc.c
@@ -642,17 +642,7 @@ static int zs_stats_size_show(struct seq
 	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);
-}