From: Alexey Dobriyan <adobriyan@gmail.com>
Date: Tue, 10 Apr 2018 23:32:01 +0000 (-0700)
Subject: proc: faster /proc/cmdline
X-Git-Tag: v4.17-rc1~52^2~68
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=58c501aab3e54b99eac632a2f5ab5f53e0c27948;p=uclinux-h8%2Flinux.git

proc: faster /proc/cmdline

Use seq_puts() and skip format string processing.

Link: http://lkml.kernel.org/r/20180309222948.GB3843@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/fs/proc/cmdline.c b/fs/proc/cmdline.c
index 403cbb12a6e9..8233e7af9389 100644
--- a/fs/proc/cmdline.c
+++ b/fs/proc/cmdline.c
@@ -6,7 +6,8 @@
 
 static int cmdline_proc_show(struct seq_file *m, void *v)
 {
-	seq_printf(m, "%s\n", saved_command_line);
+	seq_puts(m, saved_command_line);
+	seq_putc(m, '\n');
 	return 0;
 }