[PATCH] reset tss->io_bitmap_owner in sys_ioperm()
[linux-2.6.git] / arch / i386 / kernel / ioport.c
index f2b3765..b59a34d 100644 (file)
@@ -108,8 +108,11 @@ asmlinkage long sys_ioperm(unsigned long from, unsigned long num, int turn_on)
        /*
         * Sets the lazy trigger so that the next I/O operation will
         * reload the correct bitmap.
+        * Reset the owner so that a process switch will not set
+        * tss->io_bitmap_base to IO_BITMAP_OFFSET.
         */
        tss->io_bitmap_base = INVALID_IO_BITMAP_OFFSET_LAZY;
+       tss->io_bitmap_owner = NULL;
 
        put_cpu();