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lguest: fix pending interrupt test. 

Denys says:
  TEST with zero will always set ZF. Thus, "jnz send_interrupts" never jumps.

We get interrupts regularly enough that this didn't cause immediate problems.

Reported-by: Denys Vlasenko <vda.linux@googlemail.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2015-03-20 14:18:12 +10:30
parent c58616580e
commit 88ad1a147e
1 changed files with 1 additions and 1 deletions
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2
arch/x86/lguest/head_32.S
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@ -84,7 +84,7 @@ ENTRY(lg_irq_enable)
* set lguest_data.irq_pending to X86_EFLAGS_IF. If it's not zero, we * set lguest_data.irq_pending to X86_EFLAGS_IF. If it's not zero, we
* jump to send_interrupts, otherwise we're done. * jump to send_interrupts, otherwise we're done.
*/ */
testl $0, lguest_data+LGUEST_DATA_irq_pending cmpl $0, lguest_data+LGUEST_DATA_irq_pending
jnz send_interrupts jnz send_interrupts
/* /*
* One cool thing about x86 is that you can do many things without using * One cool thing about x86 is that you can do many things without using