linux-kernel - [PATCH 3.16 090/217] xtensa: clear all DBREAKC registers on start

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Message-ID: <lsq.1461711741.565948512@decadent.org.uk>
Date:	Wed, 27 Apr 2016 01:02:21 +0200
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:	akpm@...ux-foundation.org, "Max Filippov" <jcmvbkbc@...il.com>
Subject: [PATCH 3.16 090/217] xtensa: clear all DBREAKC registers on start

3.16.35-rc1 review patch.  If anyone has any objections, please let me know.

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

From: Max Filippov <jcmvbkbc@...il.com>

commit 7de7ac785ae18a2cdc78d7560f48e3213d9ea0ab upstream.

There are XCHAL_NUM_DBREAK registers, clear them all.
This also fixes cryptic assembler error message with binutils 2.25 when
XCHAL_NUM_DBREAK is 0:

  as: out of memory allocating 18446744073709551575 bytes after a total
  of 495616 bytes

Signed-off-by: Max Filippov <jcmvbkbc@...il.com>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 arch/xtensa/kernel/head.S | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/xtensa/kernel/head.S
+++ b/arch/xtensa/kernel/head.S
@@ -123,7 +123,7 @@ ENTRY(_startup)
 	wsr	a0, icountlevel
 
 	.set	_index, 0
-	.rept	XCHAL_NUM_DBREAK - 1
+	.rept	XCHAL_NUM_DBREAK
 	wsr	a0, SREG_DBREAKC + _index
 	.set	_index, _index + 1
 	.endr