mm: huge_memory: convert remaining use of sprintf to sysfs_emit and neatening

Convert the only use of sprintf with struct kobject * that the cocci
script could not convert.

Miscellanea:

 - Neaten the uses of a constant string with sysfs_emit to use a const
   char * to reduce overall object size

Link: https://lkml.kernel.org/r/7df6be66bbd68e1a0bca9d35aca1341dbf94d2a7.1605376435.git.joe@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Hugh Dickins <hughd@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Pekka Enberg <penberg@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mm/huge_memory.c

@@ -163,12 +163,17 @@ static struct shrinker huge_zero_page_shrinker = {
 static ssize_t enabled_show(struct kobject *kobj,
 			    struct kobj_attribute *attr, char *buf)
 {
+	const char *output;
+
 	if (test_bit(TRANSPARENT_HUGEPAGE_FLAG, &transparent_hugepage_flags))
-		return sysfs_emit(buf, "[always] madvise never\n");
+		output = "[always] madvise never";
-	else if (test_bit(TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG, &transparent_hugepage_flags))
+	else if (test_bit(TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG,
-		return sysfs_emit(buf, "always [madvise] never\n");
+			  &transparent_hugepage_flags))
+		output = "always [madvise] never";
 	else
-		return sysfs_emit(buf, "always madvise [never]\n");
+		output = "always madvise [never]";
+
+	return sysfs_emit(buf, "%s\n", output);
 }
 
 static ssize_t enabled_store(struct kobject *kobj,
@@ -200,11 +205,11 @@ static struct kobj_attribute enabled_attr =
 	__ATTR(enabled, 0644, enabled_show, enabled_store);
 
 ssize_t single_hugepage_flag_show(struct kobject *kobj,
-				struct kobj_attribute *attr, char *buf,
+				  struct kobj_attribute *attr, char *buf,
-				enum transparent_hugepage_flag flag)
+				  enum transparent_hugepage_flag flag)
 {
-	return sprintf(buf, "%d\n",
+	return sysfs_emit(buf, "%d\n",
-		       !!test_bit(flag, &transparent_hugepage_flags));
+			  !!test_bit(flag, &transparent_hugepage_flags));
 }
 
 ssize_t single_hugepage_flag_store(struct kobject *kobj,
@@ -232,19 +237,24 @@ ssize_t single_hugepage_flag_store(struct kobject *kobj,
 static ssize_t defrag_show(struct kobject *kobj,
 			   struct kobj_attribute *attr, char *buf)
 {
-	if (test_bit(TRANSPARENT_HUGEPAGE_DEFRAG_DIRECT_FLAG, &transparent_hugepage_flags))
+	const char *output;
-		return sysfs_emit(buf,
+
-				  "[always] defer defer+madvise madvise never\n");
+	if (test_bit(TRANSPARENT_HUGEPAGE_DEFRAG_DIRECT_FLAG,
-	if (test_bit(TRANSPARENT_HUGEPAGE_DEFRAG_KSWAPD_FLAG, &transparent_hugepage_flags))
+		     &transparent_hugepage_flags))
-		return sysfs_emit(buf,
+		output = "[always] defer defer+madvise madvise never";
-				  "always [defer] defer+madvise madvise never\n");
+	else if (test_bit(TRANSPARENT_HUGEPAGE_DEFRAG_KSWAPD_FLAG,
-	if (test_bit(TRANSPARENT_HUGEPAGE_DEFRAG_KSWAPD_OR_MADV_FLAG, &transparent_hugepage_flags))
+			  &transparent_hugepage_flags))
-		return sysfs_emit(buf,
+		output = "always [defer] defer+madvise madvise never";
-				  "always defer [defer+madvise] madvise never\n");
+	else if (test_bit(TRANSPARENT_HUGEPAGE_DEFRAG_KSWAPD_OR_MADV_FLAG,
-	if (test_bit(TRANSPARENT_HUGEPAGE_DEFRAG_REQ_MADV_FLAG, &transparent_hugepage_flags))
+			  &transparent_hugepage_flags))
-		return sysfs_emit(buf,
+		output = "always defer [defer+madvise] madvise never";
-				  "always defer defer+madvise [madvise] never\n");
+	else if (test_bit(TRANSPARENT_HUGEPAGE_DEFRAG_REQ_MADV_FLAG,
-	return sysfs_emit(buf, "always defer defer+madvise madvise [never]\n");
+			  &transparent_hugepage_flags))
+		output = "always defer defer+madvise [madvise] never";
+	else
+		output = "always defer defer+madvise madvise [never]";
+
+	return sysfs_emit(buf, "%s\n", output);
 }
 
 static ssize_t defrag_store(struct kobject *kobj,