You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
53 lines
1.8 KiB
53 lines
1.8 KiB
From patchwork Wed Aug 5 22:42:40 2015
|
|
Content-Type: text/plain; charset="utf-8"
|
|
MIME-Version: 1.0
|
|
Content-Transfer-Encoding: 7bit
|
|
Subject: [6/6] MIPS: CPS: drop .set mips64r2 directives
|
|
From: Paul Burton <paul.burton@imgtec.com>
|
|
X-Patchwork-Id: 10869
|
|
Message-Id: <1438814560-19821-7-git-send-email-paul.burton@imgtec.com>
|
|
To: <linux-mips@linux-mips.org>
|
|
Cc: Paul Burton <paul.burton@imgtec.com>,
|
|
Markos Chandras <markos.chandras@imgtec.com>,
|
|
<stable@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
|
|
James Hogan <james.hogan@imgtec.com>, "Ralf Baechle" <ralf@linux-mips.org>
|
|
Date: Wed, 5 Aug 2015 15:42:40 -0700
|
|
|
|
Commit 977e043d5ea1 ("MIPS: kernel: cps-vec: Replace mips32r2 ISA level
|
|
with mips64r2") leads to .set mips64r2 directives being present in 32
|
|
bit (ie. CONFIG_32BIT=y) kernels. This is incorrect & leads to MIPS64
|
|
instructions being emitted by the assembler when expanding
|
|
pseudo-instructions. For example the "move" instruction can legitimately
|
|
be expanded to a "daddu". This causes problems when the kernel is run on
|
|
a MIPS32 CPU, as CONFIG_32BIT kernels of course often are...
|
|
|
|
Fix this by dropping the .set <ISA> directives entirely now that Kconfig
|
|
should be ensuring that kernels including this code are built with a
|
|
suitable -march= compiler flag.
|
|
|
|
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
|
|
Cc: Markos Chandras <markos.chandras@imgtec.com>
|
|
Cc: <stable@vger.kernel.org> # 3.16+
|
|
---
|
|
|
|
arch/mips/kernel/cps-vec.S | 2 --
|
|
1 file changed, 2 deletions(-)
|
|
|
|
--- a/arch/mips/kernel/cps-vec.S
|
|
+++ b/arch/mips/kernel/cps-vec.S
|
|
@@ -229,7 +229,6 @@ LEAF(mips_cps_core_init)
|
|
has_mt t0, 3f
|
|
|
|
.set push
|
|
- .set mips64r2
|
|
.set mt
|
|
|
|
/* Only allow 1 TC per VPE to execute... */
|
|
@@ -348,7 +347,6 @@ LEAF(mips_cps_boot_vpes)
|
|
nop
|
|
|
|
.set push
|
|
- .set mips64r2
|
|
.set mt
|
|
|
|
1: /* Enter VPE configuration state */
|
|
|