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-rw-r--r--arch/x86/kernel/ioport.c6
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 *)&regsp;
+ struct pt_regs *regs = (struct pt_regs *)&regsp;
unsigned int level = regs->bx;
unsigned int old = (regs->flags >> 12) & 3;
+ struct thread_struct *t = &current->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