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-rw-r--r--arch/x86/kernel/ioport.c28
1 files changed, 4 insertions, 24 deletions
diff --git a/arch/x86/kernel/ioport.c b/arch/x86/kernel/ioport.c
index 99c4d308f16b..8eec0ec59af2 100644
--- a/arch/x86/kernel/ioport.c
+++ b/arch/x86/kernel/ioport.c
@@ -103,9 +103,10 @@ asmlinkage long sys_ioperm(unsigned long from, unsigned long num, int turn_on)
103 * on system-call entry - see also fork() and the signal handling 103 * on system-call entry - see also fork() and the signal handling
104 * code. 104 * code.
105 */ 105 */
106static int do_iopl(unsigned int level, struct pt_regs *regs) 106long sys_iopl(unsigned int level, struct pt_regs *regs)
107{ 107{
108 unsigned int old = (regs->flags >> 12) & 3; 108 unsigned int old = (regs->flags >> 12) & 3;
109 struct thread_struct *t = &current->thread;
109 110
110 if (level > 3) 111 if (level > 3)
111 return -EINVAL; 112 return -EINVAL;
@@ -115,29 +116,8 @@ static int do_iopl(unsigned int level, struct pt_regs *regs)
115 return -EPERM; 116 return -EPERM;
116 } 117 }
117 regs->flags = (regs->flags & ~X86_EFLAGS_IOPL) | (level << 12); 118 regs->flags = (regs->flags & ~X86_EFLAGS_IOPL) | (level << 12);
118
119 return 0;
120}
121
122#ifdef CONFIG_X86_32
123long sys_iopl(struct pt_regs *regs)
124{
125 unsigned int level = regs->bx;
126 struct thread_struct *t = &current->thread;
127 int rc;
128
129 rc = do_iopl(level, regs);
130 if (rc < 0)
131 goto out;
132
133 t->iopl = level << 12; 119 t->iopl = level << 12;
134 set_iopl_mask(t->iopl); 120 set_iopl_mask(t->iopl);
135out: 121
136 return rc; 122 return 0;
137}
138#else
139asmlinkage long sys_iopl(unsigned int level, struct pt_regs *regs)
140{
141 return do_iopl(level, regs);
142} 123}
143#endif