MIPS: Support for 64-bit FP with O32 binaries

[~andy/linux] / arch / mips / kernel / traps.c

diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index f9c8746be8d66d78b3ad1fc500d72674d486cdb9..f40f688276c251e343fbd694e33430da4a8e4e26 100644 (file)
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -1080,7 +1080,7 @@ asmlinkage void do_cpu(struct pt_regs *regs)
        unsigned long old_epc, old31;
        unsigned int opcode;
        unsigned int cpid;
-       int status;
+       int status, err;
        unsigned long __maybe_unused flags;
 
        prev_state = exception_enter();
@@ -1153,19 +1153,19 @@ asmlinkage void do_cpu(struct pt_regs *regs)
 
        case 1:
                if (used_math())        /* Using the FPU again.  */
-                       own_fpu(1);
+                       err = own_fpu(1);
                else {                  /* First time FPU user.  */
-                       init_fpu();
+                       err = init_fpu();
                        set_used_math();
                }
 
-               if (!raw_cpu_has_fpu) {
+               if (!raw_cpu_has_fpu || err) {
                        int sig;
                        void __user *fault_addr = NULL;
                        sig = fpu_emulator_cop1Handler(regs,
                                                       &current->thread.fpu,
                                                       0, &fault_addr);
-                       if (!process_fpemu_return(sig, fault_addr))
+                       if (!process_fpemu_return(sig, fault_addr) && !err)
                                mt_ase_fp_affinity();
                }