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 <[email protected]> Cc: Ralf Baechle <[email protected]> Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/17774/
sfionov · Jan 22, 2018 · 3478ba9 · 3478ba9
1 parent 8e4789d
commit 3478ba9
Showing 1 changed file with 2 additions and 2 deletions.
diff --git 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)