[PATCH 4/5] mm: shmem: Convert shmem_enabled_show to use sysfs_emit_at

[Joe Perches]

Update the function to use sysfs_emit_at while neatening the uses
of sprintf and overwriting the last space char with a newline.

Signed-off-by: Joe Perches <j...@perches.com>
---
 mm/shmem.c | 21 ++++++++++++---------
 1 file changed, 12 insertions(+), 9 deletions(-)

diff --git a/mm/shmem.c b/mm/shmem.c
index 5009d783d954..294ba0017a0f 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -4024,7 +4024,7 @@ int __init shmem_init(void)
 
 #if defined(CONFIG_TRANSPARENT_HUGEPAGE) && defined(CONFIG_SYSFS)
 static ssize_t shmem_enabled_show(struct kobject *kobj,
-               struct kobj_attribute *attr, char *buf)
+                                 struct kobj_attribute *attr, char *buf)
 {
        static const int values[] = {
                SHMEM_HUGE_ALWAYS,
@@ -4034,16 +4034,19 @@ static ssize_t shmem_enabled_show(struct kobject *kobj,
                SHMEM_HUGE_DENY,
                SHMEM_HUGE_FORCE,
        };
-       int i, count;
-
-       for (i = 0, count = 0; i < ARRAY_SIZE(values); i++) {
-               const char *fmt = shmem_huge == values[i] ? "[%s] " : "%s ";
+       int len = 0;
+       int i;
 
-               count += sprintf(buf + count, fmt,
-                               shmem_format_huge(values[i]));
+       for (i = 0; i < ARRAY_SIZE(values); i++) {
+               len += sysfs_emit_at(buf, len,
+                                    shmem_huge == values[i] ? "%s[%s]" : 
"%s%s",
+                                    i ? " " : "",
+                                    shmem_format_huge(values[i]));
        }
-       buf[count - 1] = '\n';
-       return count;
+
+       len += sysfs_emit_at(buf, len, "\n");
+
+       return len;
 }
 
 static ssize_t shmem_enabled_store(struct kobject *kobj,
-- 
2.26.0