MIPS: kernel: Prepare the JR instruction for emulation on MIPS R6

The MIPS R6 JR instruction is an alias to the JALR one, so it may
need emulation for non-R6 userlands.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>

diff --git a/arch/mips/include/asm/branch.h b/arch/mips/include/asm/branch.h
index de781cf..2894ea5 100644 (file)
--- a/arch/mips/include/asm/branch.h
+++ b/arch/mips/include/asm/branch.h
@@ -13,6 +13,9 @@
 #include <asm/ptrace.h>
 #include <asm/inst.h>
 
+static int mipsr2_emulation = 0;
+#define NO_R6EMU       (cpu_has_mips_r6 && !mipsr2_emulation)
+
 extern int __isa_exception_epc(struct pt_regs *regs);
 extern int __compute_return_epc(struct pt_regs *regs);
 extern int __compute_return_epc_for_insn(struct pt_regs *regs,

diff --cc arch/mips/kernel/branch.c
Simple merge

diff --cc arch/mips/math-emu/cp1emu.c
Simple merge