linux-kernel - [PATCH 10/20] UML - Move register initialization

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Message-ID: <20080117214044.GA6737@c2.user-mode-linux.org>
Date:	Thu, 17 Jan 2008 16:40:44 -0500
From:	Jeff Dike <jdike@...toit.com>
To:	Andrew Morton <akpm@...l.org>
Cc:	uml-devel <user-mode-linux-devel@...ts.sourceforge.net>,
	LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH 10/20] UML - Move register initialization

Calling init_registers inside the skas3 checking causes mysterious
crashes if it doesn't happen because the skas3 checking is bypassed.
This patch moves it to os_early_checks.

Signed-off-by: Jeff Dike <jdike@...ux.intel.com>
---
 arch/um/os-Linux/start_up.c |   10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

Index: linux-2.6.22/arch/um/os-Linux/start_up.c
===================================================================
--- linux-2.6.22.orig/arch/um/os-Linux/start_up.c	2007-12-19 13:15:22.000000000 -0500
+++ linux-2.6.22/arch/um/os-Linux/start_up.c	2007-12-19 13:16:08.000000000 -0500
@@ -342,6 +342,8 @@ static void __init check_coredump_limit(
 
 void __init os_early_checks(void)
 {
+	int pid;
+
 	/* Print out the core dump limits early */
 	check_coredump_limit();
 
@@ -351,6 +353,11 @@ void __init os_early_checks(void)
 	 * kernel is running.
 	 */
 	check_tmpexec();
+
+	pid = start_ptraced_child();
+	if (init_registers(pid))
+		fatal("Failed to initialize default registers");
+	stop_ptraced_child(pid, 1, 1);
 }
 
 static int __init noprocmm_cmd_param(char *str, int* add)
@@ -412,9 +419,6 @@ static inline void check_skas3_ptrace_fa
 			non_fatal("found\n");
 	}
 
-	if (init_registers(pid))
-		fatal("Failed to initialize default registers");
-
 	stop_ptraced_child(pid, 1, 1);
 }
 
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