linux-kernel - [PATCH 2/3] c6x: switch to generic kernel

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Date:	Fri, 21 Sep 2012 12:26:38 -0400
From:	Mark Salter <msalter@...hat.com>
To:	Al Viro <viro@...IV.linux.org.uk>
Cc:	linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
	Mark Salter <msalter@...hat.com>
Subject: [PATCH 2/3] c6x: switch to generic kernel_execve

Signed-off-by: Mark Salter <msalter@...hat.com>
---
 arch/c6x/include/asm/unistd.h |    2 ++
 arch/c6x/kernel/entry.S       |   13 ++++++-------
 2 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/arch/c6x/include/asm/unistd.h b/arch/c6x/include/asm/unistd.h
index 6d54ea4..1ce3a6f 100644
--- a/arch/c6x/include/asm/unistd.h
+++ b/arch/c6x/include/asm/unistd.h
@@ -16,6 +16,8 @@
 #if !defined(_ASM_C6X_UNISTD_H) || defined(__SYSCALL)
 #define _ASM_C6X_UNISTD_H
 
+#define __ARCH_WANT_KERNEL_EXECVE
+
 /* Use the standard ABI for syscalls. */
 #include <asm-generic/unistd.h>
 
diff --git a/arch/c6x/kernel/entry.S b/arch/c6x/kernel/entry.S
index 6e6bd9d..32e3683 100644
--- a/arch/c6x/kernel/entry.S
+++ b/arch/c6x/kernel/entry.S
@@ -420,6 +420,12 @@ ENTRY(ret_from_kernel_thread)
 	BNOP	.S2	B11,5	/* jump to sys_exit */
 ENDPROC(ret_from_kernel_thread)
 
+ENTRY(ret_from_kernel_execve)
+	GET_THREAD_INFO A12
+	BNOP	.S2	syscall_exit,4
+	ADD	.D2X	A4,-8,SP
+ENDPROC(ret_from_kernel_execve)
+
 	;;
 	;; These are the interrupt handlers, responsible for calling __do_IRQ()
 	;; int6 is used for syscalls (see _system_call entry)
@@ -613,13 +619,6 @@ ENTRY(sys_sigaltstack)
 	NOP	4
 ENDPROC(sys_sigaltstack)
 
-	;; kernel_execve
-ENTRY(kernel_execve)
-	MVK	.S2	__NR_execve,B0
-	SWE
-	BNOP	.S2	B3,5
-ENDPROC(kernel_execve)
-
 	;;
 	;; Special system calls
 	;; return address is in B3
-- 
1.7.9.1

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