diff options
Diffstat (limited to 'arch/x86/kernel/ioport.c')
| -rw-r--r-- | arch/x86/kernel/ioport.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/x86/kernel/ioport.c b/arch/x86/kernel/ioport.c index ca49bab3e467..9c3cf0944bce 100644 --- 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(); } |