linux-kernel - [PATCH 01/24] init: initialize ramdisk_execute

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Date:   Mon, 20 Jul 2020 17:58:39 +0200
From:   Christoph Hellwig <hch@....de>
To:     Al Viro <viro@...iv.linux.org.uk>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        linux-kernel@...r.kernel.org, linux-raid@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-api@...r.kernel.org
Subject: [PATCH 01/24] init: initialize ramdisk_execute_command at compile time

Set ramdisk_execute_command to "/init" at compile time.  The command
line can still override it, but this saves a few instructions and
removes a NULL check.

Signed-off-by: Christoph Hellwig <hch@....de>
---
 init/main.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/init/main.c b/init/main.c
index db0621dfbb0468..c2c9143db96795 100644
--- a/init/main.c
+++ b/init/main.c
@@ -154,7 +154,7 @@ static bool initargs_found;
 #endif
 
 static char *execute_command;
-static char *ramdisk_execute_command;
+static char *ramdisk_execute_command = "/init";
 
 /*
  * Used to generate warnings if static_key manipulation functions are used
@@ -1514,10 +1514,6 @@ static noinline void __init kernel_init_freeable(void)
 	 * check if there is an early userspace init.  If yes, let it do all
 	 * the work
 	 */
-
-	if (!ramdisk_execute_command)
-		ramdisk_execute_command = "/init";
-
 	if (ksys_access((const char __user *)
 			ramdisk_execute_command, 0) != 0) {
 		ramdisk_execute_command = NULL;
-- 
2.27.0