xtensa: clear all DBREAKC registers on start

[ Upstream commit 7de7ac785ae18a2cdc78d7560f48e3213d9ea0ab ]

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

Cc: stable@vger.kernel.org
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>

diff --git a/arch/xtensa/kernel/head.S b/arch/xtensa/kernel/head.S
index aeeb3cc8a4109e59bc6ce5f23fd88c21c0450f3f..288b61f080fe85c5d999b686b8e0d872b4f996ee 100644 (file)
--- 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