When CONFIG_MIPS_FP_SUPPORT=n we don't support floating point, so remove
the floating point branch support from __compute_return_epc_for_insn() &
__mm_isBranchInstr(). This code should never be needed & more
importantly relies upon FPU state in struct task_struct which will later
be removed.
Signed-off-by: Paul Burton <paul.burton@xxxxxxxx>
---
arch/mips/kernel/branch.c | 22 ++++++++++++++++------
1 file changed, 16 insertions(+), 6 deletions(-)
diff --git a/arch/mips/kernel/branch.c b/arch/mips/kernel/branch.c
index 74f12a91bfb4..2077a4dce763 100644
--- a/arch/mips/kernel/branch.c
+++ b/arch/mips/kernel/branch.c
@@ -58,9 +58,6 @@ int __mm_isBranchInstr(struct pt_regs *regs, struct mm_decoded_insn dec_insn,
unsigned long *contpc)
{
union mips_instruction insn = (union mips_instruction)dec_insn.insn;
- int bc_false = 0;
- unsigned int fcr31;
- unsigned int bit;
if (!cpu_has_mmips)
return 0;
@@ -139,8 +136,13 @@ int __mm_isBranchInstr(struct pt_regs *regs, struct mm_decoded_insn dec_insn,
dec_insn.pc_inc +
dec_insn.next_pc_inc;
return 1;
+#ifdef CONFIG_MIPS_FP_SUPPORT
case mm_bc2f_op:
- case mm_bc1f_op:
+ case mm_bc1f_op: {
+ int bc_false = 0;
+ unsigned int fcr31;
+ unsigned int bit;
+
bc_false = 1;
/* Fall through */
case mm_bc2t_op:
@@ -167,6 +169,8 @@ int __mm_isBranchInstr(struct pt_regs *regs, struct mm_decoded_insn dec_insn,
dec_insn.pc_inc + dec_insn.next_pc_inc;
return 1;
}
+#endif /* CONFIG_MIPS_FP_SUPPORT */
+ }
break;
case mm_pool16c_op:
switch (insn.mm_i_format.rt) {
@@ -416,8 +420,8 @@ int __MIPS16e_compute_return_epc(struct pt_regs *regs)
int __compute_return_epc_for_insn(struct pt_regs *regs,
union mips_instruction insn)
{
- unsigned int bit, fcr31, dspcontrol, reg;
long epc = regs->cp0_epc;
+ unsigned int dspcontrol;
int ret = 0;
switch (insn.i_format.opcode) {
@@ -667,10 +671,13 @@ int __compute_return_epc_for_insn(struct pt_regs *regs,
regs->cp0_epc = epc;
break;
+#ifdef CONFIG_MIPS_FP_SUPPORT
/*
* And now the FPA/cp1 branch instructions.
*/
- case cop1_op:
+ case cop1_op: {
+ unsigned int bit, fcr31, reg;
+
if (cpu_has_mips_r6 &&
((insn.i_format.rs == bc1eqz_op) ||
(insn.i_format.rs == bc1nez_op))) {
@@ -728,6 +735,9 @@ int __compute_return_epc_for_insn(struct pt_regs *regs,
}
break;
}
+ }
+#endif /* CONFIG_MIPS_FP_SUPPORT */
+
#ifdef CONFIG_CPU_CAVIUM_OCTEON
case lwc2_op: /* This is bbit0 on Octeon */
if ((regs->regs[insn.i_format.rs] & (1ull<<insn.i_format.rt))
--
2.19.1
