diff options
Diffstat (limited to 'drivers/lguest/lguest.c')
| -rw-r--r-- | drivers/lguest/lguest.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/lguest/lguest.c b/drivers/lguest/lguest.c index 7e7e9fb3aef..6dfe568523a 100644 --- a/drivers/lguest/lguest.c +++ b/drivers/lguest/lguest.c @@ -250,6 +250,14 @@ static void irq_enable(void) { lguest_data.irq_enabled = X86_EFLAGS_IF; } +/*:*/ +/*M:003 Note that we don't check for outstanding interrupts when we re-enable + * them (or when we unmask an interrupt). This seems to work for the moment, + * since interrupts are rare and we'll just get the interrupt on the next timer + * tick, but when we turn on CONFIG_NO_HZ, we should revisit this. One way + * would be to put the "irq_enabled" field in a page by itself, and have the + * Host write-protect it when an interrupt comes in when irqs are disabled. + * There will then be a page fault as soon as interrupts are re-enabled. :*/ /*G:034 * The Interrupt Descriptor Table (IDT). |