linux-kernel - [PATCH v2] init/main.c: Remove redundant space from saved_command

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Date: Fri, 12 Apr 2024 11:29:50 +0800
From: Yuntao Wang <ytcoode@...il.com>
To: mhiramat@...nel.org
Cc: akpm@...ux-foundation.org,
	arnd@...db.de,
	changbin.du@...wei.com,
	christophe.leroy@...roup.eu,
	geert@...ux-m68k.org,
	jpoimboe@...nel.org,
	kjlx@...pleofstupid.com,
	linux-kernel@...r.kernel.org,
	linux-trace-kernel@...r.kernel.org,
	ndesaulniers@...gle.com,
	peterz@...radead.org,
	tglx@...utronix.de,
	tj@...nel.org,
	ytcoode@...il.com
Subject: [PATCH v2] init/main.c: Remove redundant space from saved_command_line

There is a space at the end of extra_init_args. In the current logic,
copying extra_init_args to saved_command_line will cause extra spaces
in saved_command_line here or there. Remove the trailing space from
extra_init_args to make the string in saved_command_line look more perfect.

Signed-off-by: Yuntao Wang <ytcoode@...il.com>
---
v1 -> v2: Fix the issue using the method suggested by Masami

 init/main.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/init/main.c b/init/main.c
index 881f6230ee59..0f03dd15e0e2 100644
--- a/init/main.c
+++ b/init/main.c
@@ -627,8 +627,10 @@ static void __init setup_command_line(char *command_line)
 
 	if (extra_command_line)
 		xlen = strlen(extra_command_line);
-	if (extra_init_args)
+	if (extra_init_args) {
+		extra_init_args = strim(extra_init_args); /* remove trailing space */
 		ilen = strlen(extra_init_args) + 4; /* for " -- " */
+	}
 
 	len = xlen + strlen(boot_command_line) + 1;
 
-- 
2.44.0