ocfs2: logging: remove static buffer, use vsprintf extension %pV

Use the vsprintf %pV extension to avoid using a static buffer and remove
the now unnecessary buffer.

Signed-off-by: Joe Perches <joe@perches.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

fs/ocfs2/super.c

@@ -2564,22 +2564,22 @@ static void ocfs2_handle_error(struct super_block *sb)
 	ocfs2_set_ro_flag(osb, 0);
 }
 
-static char error_buf[1024];
-
-void __ocfs2_error(struct super_block *sb,
-		   const char *function,
-		   const char *fmt, ...)
+void __ocfs2_error(struct super_block *sb, const char *function,
+		  const char *fmt, ...)
 {
+	struct va_format vaf;
 	va_list args;
 
 	va_start(args, fmt);
-	vsnprintf(error_buf, sizeof(error_buf), fmt, args);
-	va_end(args);
+	vaf.fmt = fmt;
+	vaf.va = &args;
 
 	/* Not using mlog here because we want to show the actual
 	 * function the error came from. */
-	printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n",
-	       sb->s_id, function, error_buf);
+	printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %pV\n",
+	       sb->s_id, function, &vaf);
+
+	va_end(args);
 
 	ocfs2_handle_error(sb);
 }
@@ -2587,18 +2587,21 @@ void __ocfs2_error(struct super_block *sb,
 /* Handle critical errors. This is intentionally more drastic than
  * ocfs2_handle_error, so we only use for things like journal errors,
  * etc. */
-void __ocfs2_abort(struct super_block* sb,
-		   const char *function,
+void __ocfs2_abort(struct super_block *sb, const char *function,
 		   const char *fmt, ...)
 {
+	struct va_format vaf;
 	va_list args;
 
 	va_start(args, fmt);
-	vsnprintf(error_buf, sizeof(error_buf), fmt, args);
-	va_end(args);
 
-	printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n",
-	       sb->s_id, function, error_buf);
+	vaf.fmt = fmt;
+	vaf.va = &args;
+
+	printk(KERN_CRIT "OCFS2: abort (device %s): %s: %pV\n",
+	       sb->s_id, function, &vaf);
+
+	va_end(args);
 
 	/* We don't have the cluster support yet to go straight to
 	 * hard readonly in here. Until then, we want to keep