diff options
Diffstat (limited to 'arch/mips/kernel/ptrace32.c')
| -rw-r--r-- | arch/mips/kernel/ptrace32.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/mips/kernel/ptrace32.c b/arch/mips/kernel/ptrace32.c index 0d5cf97af72..8704dc0496e 100644 --- a/arch/mips/kernel/ptrace32.c +++ b/arch/mips/kernel/ptrace32.c @@ -173,12 +173,22 @@ asmlinkage int sys32_ptrace(int request, int pid, int addr, int data) break; case FPC_EIR: { /* implementation / version register */ unsigned int flags; +#ifdef CONFIG_MIPS_MT_SMTC + unsigned int irqflags; + unsigned int mtflags; +#endif /* CONFIG_MIPS_MT_SMTC */ if (!cpu_has_fpu) { tmp = 0; break; } +#ifdef CONFIG_MIPS_MT_SMTC + /* Read-modify-write of Status must be atomic */ + local_irq_save(irqflags); + mtflags = dmt(); +#endif /* CONFIG_MIPS_MT_SMTC */ + preempt_disable(); if (cpu_has_mipsmt) { unsigned int vpflags = dvpe(); @@ -193,6 +203,10 @@ asmlinkage int sys32_ptrace(int request, int pid, int addr, int data) __asm__ __volatile__("cfc1\t%0,$0": "=r" (tmp)); write_c0_status(flags); } +#ifdef CONFIG_MIPS_MT_SMTC + emt(mtflags); + local_irq_restore(irqflags); +#endif /* CONFIG_MIPS_MT_SMTC */ preempt_enable(); break; } |