linux-kernel - [30/89] powerpc: Fix 32-bit SMP build

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Message-Id: <20110616000231.935366188@clark.kroah.org>
Date:	Wed, 15 Jun 2011 16:59:53 -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,
	Josh Boyer <jwboyer@...ux.vnet.ibm.com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>
Subject: [30/89] powerpc: Fix 32-bit SMP build

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

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

From: Josh Boyer <jwboyer@...ux.vnet.ibm.com>

commit 6de06f313a65d0ecabf055e708d082002b568866 upstream.

Commit 69e3cea8d5fd526 ("powerpc/smp: Make start_secondary_resume
available to all CPU variants") introduced start_secondary_resume to
misc_32.S, however it uses a 64-bit instruction which is not valid on
32-bit platforms.  Use 'stw' instead.

Reported-by: Richard Cochran <richardcochran@...il.com>
Tested-by: Richard Cochran <richardcochran@...il.com>
Signed-off-by: Josh Boyer <jwboyer@...ux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@...nel.crashing.org>
Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 arch/powerpc/kernel/head_32.S |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/powerpc/kernel/head_32.S
+++ b/arch/powerpc/kernel/head_32.S
@@ -896,7 +896,7 @@ _GLOBAL(start_secondary_resume)
 	rlwinm	r1,r1,0,0,(31-THREAD_SHIFT)	/* current_thread_info() */
 	addi	r1,r1,THREAD_SIZE-STACK_FRAME_OVERHEAD
 	li	r3,0
-	std	r3,0(r1)		/* Zero the stack frame pointer	*/
+	stw	r3,0(r1)		/* Zero the stack frame pointer	*/
 	bl	start_secondary
 	b	.
 #endif /* CONFIG_SMP */


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