mm/khugepaged: use helper macro __ATTR_RW

Use helper macro __ATTR_RW to define the khugepaged attributes.  Minor
readability improvement.

Link: https://lkml.kernel.org/r/20220625092816.4856-6-linmiaohe@huawei.comSigned-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: Yang Shi <shy828301@gmail.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: NeilBrown <neilb@suse.de>
Cc: Peter Xu <peterx@redhat.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Zach O'Keefe <zokeefe@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

mm/khugepaged.c

@@ -147,8 +147,7 @@ static ssize_t scan_sleep_millisecs_store(struct kobject *kobj,
 	return count;
 }
 static struct kobj_attribute scan_sleep_millisecs_attr =
-	__ATTR(scan_sleep_millisecs, 0644, scan_sleep_millisecs_show,
-	       scan_sleep_millisecs_store);
+	__ATTR_RW(scan_sleep_millisecs);
 
 static ssize_t alloc_sleep_millisecs_show(struct kobject *kobj,
 					  struct kobj_attribute *attr,
@@ -175,8 +174,7 @@ static ssize_t alloc_sleep_millisecs_store(struct kobject *kobj,
 	return count;
 }
 static struct kobj_attribute alloc_sleep_millisecs_attr =
-	__ATTR(alloc_sleep_millisecs, 0644, alloc_sleep_millisecs_show,
-	       alloc_sleep_millisecs_store);
+	__ATTR_RW(alloc_sleep_millisecs);
 
 static ssize_t pages_to_scan_show(struct kobject *kobj,
 				  struct kobj_attribute *attr,
@@ -200,8 +198,7 @@ static ssize_t pages_to_scan_store(struct kobject *kobj,
 	return count;
 }
 static struct kobj_attribute pages_to_scan_attr =
-	__ATTR(pages_to_scan, 0644, pages_to_scan_show,
-	       pages_to_scan_store);
+	__ATTR_RW(pages_to_scan);
 
 static ssize_t pages_collapsed_show(struct kobject *kobj,
 				    struct kobj_attribute *attr,
@@ -221,22 +218,21 @@ static ssize_t full_scans_show(struct kobject *kobj,
 static struct kobj_attribute full_scans_attr =
 	__ATTR_RO(full_scans);
 
-static ssize_t khugepaged_defrag_show(struct kobject *kobj,
-				      struct kobj_attribute *attr, char *buf)
+static ssize_t defrag_show(struct kobject *kobj,
+			   struct kobj_attribute *attr, char *buf)
 {
 	return single_hugepage_flag_show(kobj, attr, buf,
 					 TRANSPARENT_HUGEPAGE_DEFRAG_KHUGEPAGED_FLAG);
 }
-static ssize_t khugepaged_defrag_store(struct kobject *kobj,
-				       struct kobj_attribute *attr,
-				       const char *buf, size_t count)
+static ssize_t defrag_store(struct kobject *kobj,
+			    struct kobj_attribute *attr,
+			    const char *buf, size_t count)
 {
 	return single_hugepage_flag_store(kobj, attr, buf, count,
 				 TRANSPARENT_HUGEPAGE_DEFRAG_KHUGEPAGED_FLAG);
 }
 static struct kobj_attribute khugepaged_defrag_attr =
-	__ATTR(defrag, 0644, khugepaged_defrag_show,
-	       khugepaged_defrag_store);
+	__ATTR_RW(defrag);
 
 /*
  * max_ptes_none controls if khugepaged should collapse hugepages over
@@ -246,15 +242,15 @@ static struct kobj_attribute khugepaged_defrag_attr =
  * runs. Increasing max_ptes_none will instead potentially reduce the
  * free memory in the system during the khugepaged scan.
  */
-static ssize_t khugepaged_max_ptes_none_show(struct kobject *kobj,
-					     struct kobj_attribute *attr,
-					     char *buf)
+static ssize_t max_ptes_none_show(struct kobject *kobj,
+				  struct kobj_attribute *attr,
+				  char *buf)
 {
 	return sysfs_emit(buf, "%u\n", khugepaged_max_ptes_none);
 }
-static ssize_t khugepaged_max_ptes_none_store(struct kobject *kobj,
-					      struct kobj_attribute *attr,
-					      const char *buf, size_t count)
+static ssize_t max_ptes_none_store(struct kobject *kobj,
+				   struct kobj_attribute *attr,
+				   const char *buf, size_t count)
 {
 	int err;
 	unsigned long max_ptes_none;
@@ -268,19 +264,18 @@ static ssize_t khugepaged_max_ptes_none_store(struct kobject *kobj,
 	return count;
 }
 static struct kobj_attribute khugepaged_max_ptes_none_attr =
-	__ATTR(max_ptes_none, 0644, khugepaged_max_ptes_none_show,
-	       khugepaged_max_ptes_none_store);
+	__ATTR_RW(max_ptes_none);
 
-static ssize_t khugepaged_max_ptes_swap_show(struct kobject *kobj,
-					     struct kobj_attribute *attr,
-					     char *buf)
+static ssize_t max_ptes_swap_show(struct kobject *kobj,
+				  struct kobj_attribute *attr,
+				  char *buf)
 {
 	return sysfs_emit(buf, "%u\n", khugepaged_max_ptes_swap);
 }
 
-static ssize_t khugepaged_max_ptes_swap_store(struct kobject *kobj,
-					      struct kobj_attribute *attr,
-					      const char *buf, size_t count)
+static ssize_t max_ptes_swap_store(struct kobject *kobj,
+				   struct kobj_attribute *attr,
+				   const char *buf, size_t count)
 {
 	int err;
 	unsigned long max_ptes_swap;
@@ -295,19 +290,18 @@ static ssize_t khugepaged_max_ptes_swap_store(struct kobject *kobj,
 }
 
 static struct kobj_attribute khugepaged_max_ptes_swap_attr =
-	__ATTR(max_ptes_swap, 0644, khugepaged_max_ptes_swap_show,
-	       khugepaged_max_ptes_swap_store);
+	__ATTR_RW(max_ptes_swap);
 
-static ssize_t khugepaged_max_ptes_shared_show(struct kobject *kobj,
-					       struct kobj_attribute *attr,
-					       char *buf)
+static ssize_t max_ptes_shared_show(struct kobject *kobj,
+				    struct kobj_attribute *attr,
+				    char *buf)
 {
 	return sysfs_emit(buf, "%u\n", khugepaged_max_ptes_shared);
 }
 
-static ssize_t khugepaged_max_ptes_shared_store(struct kobject *kobj,
-					      struct kobj_attribute *attr,
-					      const char *buf, size_t count)
+static ssize_t max_ptes_shared_store(struct kobject *kobj,
+				     struct kobj_attribute *attr,
+				     const char *buf, size_t count)
 {
 	int err;
 	unsigned long max_ptes_shared;
@@ -322,8 +316,7 @@ static ssize_t khugepaged_max_ptes_shared_store(struct kobject *kobj,
 }
 
 static struct kobj_attribute khugepaged_max_ptes_shared_attr =
-	__ATTR(max_ptes_shared, 0644, khugepaged_max_ptes_shared_show,
-	       khugepaged_max_ptes_shared_store);
+	__ATTR_RW(max_ptes_shared);
 
 static struct attribute *khugepaged_attr[] = {
 	&khugepaged_defrag_attr.attr,