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54 lines
1.8 KiB
54 lines
1.8 KiB
9 years ago
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From patchwork Wed Aug 5 22:42:40 2015
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Content-Type: text/plain; charset="utf-8"
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MIME-Version: 1.0
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Content-Transfer-Encoding: 7bit
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Subject: [6/6] MIPS: CPS: drop .set mips64r2 directives
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From: Paul Burton <paul.burton@imgtec.com>
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X-Patchwork-Id: 10869
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Message-Id: <1438814560-19821-7-git-send-email-paul.burton@imgtec.com>
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To: <linux-mips@linux-mips.org>
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Cc: Paul Burton <paul.burton@imgtec.com>,
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Markos Chandras <markos.chandras@imgtec.com>,
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<stable@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
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James Hogan <james.hogan@imgtec.com>, "Ralf Baechle" <ralf@linux-mips.org>
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Date: Wed, 5 Aug 2015 15:42:40 -0700
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Commit 977e043d5ea1 ("MIPS: kernel: cps-vec: Replace mips32r2 ISA level
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with mips64r2") leads to .set mips64r2 directives being present in 32
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bit (ie. CONFIG_32BIT=y) kernels. This is incorrect & leads to MIPS64
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instructions being emitted by the assembler when expanding
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pseudo-instructions. For example the "move" instruction can legitimately
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be expanded to a "daddu". This causes problems when the kernel is run on
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a MIPS32 CPU, as CONFIG_32BIT kernels of course often are...
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Fix this by dropping the .set <ISA> directives entirely now that Kconfig
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should be ensuring that kernels including this code are built with a
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suitable -march= compiler flag.
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Signed-off-by: Paul Burton <paul.burton@imgtec.com>
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Cc: Markos Chandras <markos.chandras@imgtec.com>
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Cc: <stable@vger.kernel.org> # 3.16+
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---
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arch/mips/kernel/cps-vec.S | 2 --
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1 file changed, 2 deletions(-)
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--- a/arch/mips/kernel/cps-vec.S
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+++ b/arch/mips/kernel/cps-vec.S
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@@ -229,7 +229,6 @@ LEAF(mips_cps_core_init)
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has_mt t0, 3f
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.set push
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- .set mips64r2
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.set mt
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/* Only allow 1 TC per VPE to execute... */
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@@ -348,7 +347,6 @@ LEAF(mips_cps_boot_vpes)
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nop
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.set push
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- .set mips64r2
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.set mt
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1: /* Enter VPE configuration state */
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