[PATCH] CHECK_IRQ_PER_CPU() to avoid dead code in __do_IRQ()

[linux-2.6] / include / asm-i386 / processor.h

diff --git a/include/asm-i386/processor.h b/include/asm-i386/processor.h
index 992224bff54953852fe36ff605f1da4f0bfa335f..37bef8ed7bed12bd33bf3670ccf7991516aa7484 100644 (file)
--- a/include/asm-i386/processor.h
+++ b/include/asm-i386/processor.h
@@ -455,6 +455,7 @@ struct thread_struct {
        unsigned int            saved_fs, saved_gs;
 /* IO permissions */
        unsigned long   *io_bitmap_ptr;
+       unsigned long   iopl;
 /* max allowed port in the bitmap, in bytes: */
        unsigned long   io_bitmap_max;
 };
@@ -511,6 +512,21 @@ static inline void load_esp0(struct tss_struct *tss, struct thread_struct *threa
                        : /* no output */                       \
                        :"r" (value))
 
+/*
+ * Set IOPL bits in EFLAGS from given mask
+ */
+static inline void set_iopl_mask(unsigned mask)
+{
+       unsigned int reg;
+       __asm__ __volatile__ ("pushfl;"
+                             "popl %0;"
+                             "andl %1, %0;"
+                             "orl %2, %0;"
+                             "pushl %0;"
+                             "popfl"
+                               : "=&r" (reg)
+                               : "i" (~X86_EFLAGS_IOPL), "r" (mask));
+}
 
 /* Forward declaration, a strange C thing */
 struct task_struct;