fs/ecryptfs: replace snprintf with sysfs_emit in show function

Use sysfs_emit() instead of snprintf() in version_show() function to
follow the preferred kernel API.

Signed-off-by: Ankit Chauhan <[e-mail]>
Link: https://lore.kernel.org/[e-mail]
Signed-off-by: Christian Brauner <[e-mail]>

fs/ecryptfs/main.c

···
 #include <linux/fs_context.h>
 #include <linux/fs_parser.h>
 #include <linux/fs_stack.h>
+#include <linux/sysfs.h>
 #include <linux/slab.h>
 #include <linux/magic.h>
 #include "ecryptfs_kernel.h"
···
 static ssize_t version_show(struct kobject *kobj,
 			    struct kobj_attribute *attr, char *buff)
 {
-	return snprintf(buff, PAGE_SIZE, "%d\n", ECRYPTFS_VERSIONING_MASK);
+	return sysfs_emit(buff, "%d\n", ECRYPTFS_VERSIONING_MASK);
 }
 
 static struct kobj_attribute version_attr = __ATTR_RO(version);