linux-kernel - [32/70] sparc32: Pass task_struct to schedule_tail() in ret_from

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Message-Id: <20110419201046.561934944@clark.kroah.org>
Date:	Tue, 19 Apr 2011 13:08:41 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Tkhai Kirill <tkhai@...dex.ru>,
	"David S. Miller" <davem@...emloft.net>
Subject: [32/70] sparc32: Pass task_struct to schedule_tail() in ret_from_fork

2.6.38-stable review patch.  If anyone has any objections, please let us know.

------------------


From: Tkhai Kirill <tkhai@...dex.ru>

[ Upstream commit 47c7c97a93a5b8f719093dbf83555090b3b8228b ]

We have to pass task_struct of previous process to function
schedule_tail(). Currently in ret_from_fork previous thread_info
is passed:

switch_to: mov %g6, %g3 /* previous thread_info in g6 */

ret_from_fork: call    schedule_tail
                mov    %g3, %o0 /* previous thread_info is passed */

void schedule_tail(struct task_struct *prev);

Signed-off-by: Tkhai Kirill <tkhai@...dex.ru>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
---
 arch/sparc/kernel/entry.S |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/sparc/kernel/entry.S
+++ b/arch/sparc/kernel/entry.S
@@ -1283,7 +1283,7 @@ linux_syscall_trace:
 	.globl	ret_from_fork
 ret_from_fork:
 	call	schedule_tail
-	 mov	%g3, %o0
+	 ld	[%g3 + TI_TASK], %o0
 	b	ret_sys_call
 	 ld	[%sp + STACKFRAME_SZ + PT_I0], %o0
 


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