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MIPS: CPS: Stop dangling delay slot from has_mt.

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The has_mt macro ended with a branch, leaving its callers with a delay
slot that would be executed if Config3.MT is not set. However it would
not be executed if Config3 (or earlier Config registers) don't exist
which makes it somewhat inconsistent at best. Fill the delay slot in the
macro & fix the mips_cps_boot_vpes caller appropriately.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: Markos Chandras <markos.chandras@imgtec.com>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: <stable@vger.kernel.org> # 3.16+
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/10865/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Paul Burton 2015-08-05 15:42:36 -07:00 committed by Ralf Baechle
parent 53960059d5
commit 1e5fb282f8
1 changed files with 2 additions and 2 deletions
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4
arch/mips/kernel/cps-vec.S
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@ -39,6 +39,7 @@
mfc0 \dest, CP0_CONFIG, 3
andi \dest, \dest, MIPS_CONF3_MT
beqz \dest, \nomt
nop
.endm
.section .text.cps-vec
@ -226,7 +227,6 @@ LEAF(mips_cps_core_init)
#ifdef CONFIG_MIPS_MT
/* Check that the core implements the MT ASE */
has_mt t0, 3f
nop
.set push
.set mips64r2
@ -310,8 +310,8 @@ LEAF(mips_cps_boot_vpes)
PTR_ADDU t0, t0, t1
/* Calculate this VPEs ID. If the core doesn't support MT use 0 */
li t9, 0
has_mt ta2, 1f
li t9, 0
/* Find the number of VPEs present in the core */
mfc0 t1, CP0_MVPCONF0