From 3478ba9969dae8e1537ad9b74d7bc01d9087d0cd Mon Sep 17 00:00:00 2001
From: James Hogan <jhogan@kernel.org>
Date: Wed, 22 Nov 2017 11:30:31 +0000
Subject: [PATCH] MIPS: XPA: Allow use of $0 (zero) to MTHC0
Tweak __writex_32bit_c0_register() to allow the compiler to use $0 (the
zero register) as an input to the mthc0 instruction.
Signed-off-by: James Hogan <jhogan@kernel.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/17774/
---
arch/mips/include/asm/mipsregs.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/mips/include/asm/mipsregs.h b/arch/mips/include/asm/mipsregs.h
index f336846fb415..b1dedd5935a1 100644
--- a/arch/mips/include/asm/mipsregs.h
+++ b/arch/mips/include/asm/mipsregs.h
@@ -1537,10 +1537,10 @@ do { \
" .set push \n" \
" .set mips32r2 \n" \
_ASM_SET_XPA \
- " mthc0 %0, $%1 \n" \
+ " mthc0 %z0, $%1 \n" \
" .set pop \n" \
: \
- : "r" (value), "i" (register)); \
+ : "Jr" (value), "i" (register)); \
} while (0)
#define read_c0_index() __read_32bit_c0_register($0, 0)
--
2.30.9