[PATCH 4.4 139/210] xtensa: clear all DBREAKC registers on start

From: Greg Kroah-Hartman
Date: Sun Apr 10 2016 - 15:49:48 EST


4.4-stable review patch. If anyone has any objections, please let me know.

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

From: Max Filippov <jcmvbkbc@xxxxxxxxx>

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@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
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
@@ -128,7 +128,7 @@ 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