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Diffstat (limited to 'arch/mips/kernel/traps.c')
-rw-r--r--arch/mips/kernel/traps.c25
1 files changed, 5 insertions, 20 deletions
diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index 7d76a85422b2..493cb29b8a42 100644
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -650,7 +650,7 @@ asmlinkage void do_bp(struct pt_regs *regs)
unsigned int opcode, bcode;
siginfo_t info;
- if (get_user(opcode, (unsigned int __user *) exception_epc(regs)))
+ if (__get_user(opcode, (unsigned int __user *) exception_epc(regs)))
goto out_sigsegv;
/*
@@ -700,7 +700,7 @@ asmlinkage void do_tr(struct pt_regs *regs)
unsigned int opcode, tcode = 0;
siginfo_t info;
- if (get_user(opcode, (unsigned int __user *) exception_epc(regs)))
+ if (__get_user(opcode, (unsigned int __user *) exception_epc(regs)))
goto out_sigsegv;
/* Immediate versions don't provide a code. */
@@ -757,11 +757,12 @@ asmlinkage void do_cpu(struct pt_regs *regs)
{
unsigned int cpid;
+ die_if_kernel("do_cpu invoked from kernel context!", regs);
+
cpid = (regs->cp0_cause >> CAUSEB_CE) & 3;
switch (cpid) {
case 0:
- die_if_kernel("do_cpu invoked from kernel context!", regs);
if (!cpu_has_llsc)
if (!simulate_llsc(regs))
return;
@@ -772,9 +773,6 @@ asmlinkage void do_cpu(struct pt_regs *regs)
break;
case 1:
- if (!test_thread_flag(TIF_ALLOW_FP_IN_KERNEL))
- die_if_kernel("do_cpu invoked from kernel context!",
- regs);
if (used_math()) /* Using the FPU again. */
own_fpu(1);
else { /* First time FPU user. */
@@ -782,19 +780,7 @@ asmlinkage void do_cpu(struct pt_regs *regs)
set_used_math();
}
- if (raw_cpu_has_fpu) {
- if (test_thread_flag(TIF_ALLOW_FP_IN_KERNEL)) {
- local_irq_disable();
- if (cpu_has_fpu)
- regs->cp0_status |= ST0_CU1;
- /*
- * We must return without enabling
- * interrupts to ensure keep FPU
- * ownership until resume.
- */
- return;
- }
- } else {
+ if (!raw_cpu_has_fpu) {
int sig;
sig = fpu_emulator_cop1Handler(regs,
&current->thread.fpu, 0);
@@ -836,7 +822,6 @@ asmlinkage void do_cpu(struct pt_regs *regs)
case 2:
case 3:
- die_if_kernel("do_cpu invoked from kernel context!", regs);
break;
}