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lguest: remove obsolete LHREQ_BREAK call

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We no longer need an efficient mechanism to force the Guest back into
host userspace, as each device is serviced without bothering the main
Guest process (aka. the Launcher).

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell
2009-06-12 22:27:10 -06:00
parent 659a0e6633
commit 5dac051bc6
4 changed files with 5 additions and 43 deletions
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11
drivers/lguest/core.c
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@@ -209,10 +209,6 @@ int run_guest(struct lg_cpu *cpu, unsigned long __user *user)
if (signal_pending(current))
return -ERESTARTSYS;
/* If Waker set break_out, return to Launcher. */
if (cpu->break_out)
return -EAGAIN;
/* Check if there are any interrupts which can be delivered now:
* if so, this sets up the hander to be executed when we next
* run the Guest. */
@@ -231,13 +227,12 @@ int run_guest(struct lg_cpu *cpu, unsigned long __user *user)
break;
/* If the Guest asked to be stopped, we sleep. The Guest's
* clock timer or LHREQ_BREAK from the Waker will wake us. */
* clock timer will wake us. */
if (cpu->halted) {
set_current_state(TASK_INTERRUPTIBLE);
/* Just before we sleep, make sure nothing snuck in
/* Just before we sleep, make sure no interrupt snuck in
* which we should be doing. */
if (interrupt_pending(cpu, &more) < LGUEST_IRQS
|| cpu->break_out)
if (interrupt_pending(cpu, &more) < LGUEST_IRQS)
set_current_state(TASK_RUNNING);
else
schedule();