diff options
| -rw-r--r-- | arch/x86/kernel/ioport.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/x86/kernel/ioport.c b/arch/x86/kernel/ioport.c index e723ff3b1d5..be72d809bce 100644 --- a/arch/x86/kernel/ioport.c +++ b/arch/x86/kernel/ioport.c @@ -116,9 +116,10 @@ asmlinkage long sys_ioperm(unsigned long from, unsigned long num, int turn_on) #ifdef CONFIG_X86_32 asmlinkage long sys_iopl(unsigned long regsp) { - volatile struct pt_regs *regs = (struct pt_regs *)®sp; + struct pt_regs *regs = (struct pt_regs *)®sp; unsigned int level = regs->bx; unsigned int old = (regs->flags >> 12) & 3; + struct thread_struct *t = ¤t->thread; if (level > 3) return -EINVAL; @@ -127,8 +128,9 @@ asmlinkage long sys_iopl(unsigned long regsp) if (!capable(CAP_SYS_RAWIO)) return -EPERM; } + t->iopl = level << 12; regs->flags = (regs->flags & ~X86_EFLAGS_IOPL) | (level << 12); - + set_iopl_mask(t->iopl); return 0; } #else |