Merge tag 'kvm-4.11-2' of git://git.kernel.org/pub/scm/virt/kvm/kvm

[thirdparty/kernel/stable.git] / arch / x86 / kernel / ioport.c

diff --git a/arch/x86/kernel/ioport.c b/arch/x86/kernel/ioport.c
index ca49bab3e4677c5ca876907452e05b84136f8a1a..9c3cf0944bce35471cf0d1c34eac1e9a92d2eaa7 100644 (file)
--- a/arch/x86/kernel/ioport.c
+++ b/arch/x86/kernel/ioport.c
@@ -48,8 +48,14 @@ asmlinkage long sys_ioperm(unsigned long from, unsigned long num, int turn_on)
                t->io_bitmap_ptr = bitmap;
                set_thread_flag(TIF_IO_BITMAP);
 
+               /*
+                * Now that we have an IO bitmap, we need our TSS limit to be
+                * correct.  It's fine if we are preempted after doing this:
+                * with TIF_IO_BITMAP set, context switches will keep our TSS
+                * limit correct.
+                */
                preempt_disable();
-               refresh_TR();
+               refresh_tss_limit();
                preempt_enable();
        }