xtensa: clear all DBREAKC registers on start

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

Cc: stable@vger.kernel.org
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Willy Tarreau <w@1wt.eu>

diff --git a/arch/xtensa/kernel/head.S b/arch/xtensa/kernel/head.S
index 7d740ebbe198ec77a8011601f4172ebc809b9be8..bb12d778f64fa5cb96e2d731ded29d5e120d6b21 100644 (file)
--- a/arch/xtensa/kernel/head.S
+++ b/arch/xtensa/kernel/head.S
@@ -118,7 +118,7 @@ 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