xtensa: clear all DBREAKC registers on start

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>

diff --git a/arch/xtensa/kernel/head.S b/arch/xtensa/kernel/head.S
index 9ed55649ac8ef1d8e6befae8f5d50498f6f5f35b..05e1df943856fbe449d77177d5f1e0eeaf734776 100644 (file)
--- 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