x86/paravirt: remove lazy mode in interrupts

Impact: simplification, robustness

Make paravirt_lazy_mode() always return PARAVIRT_LAZY_NONE
when in an interrupt.  This prevents interrupt code from
accidentally inheriting an outer lazy state, and instead
does everything synchronously.  Outer batched operations
are left deferred.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 0 insertions, 1 deletions

diff --git a/arch/x86/mm/iomap_32.c b/arch/x86/mm/iomap_32.c
index 04102d42ff42..b6a61f3d7ef8 100644
--- a/arch/x86/mm/iomap_32.c
+++ b/arch/x86/mm/iomap_32.c
@@ -74,7 +74,6 @@ iounmap_atomic(void *kvaddr, enum km_type type)
         if (vaddr == __fix_to_virt(FIX_KMAP_BEGIN+idx))
                 kpte_clear_flush(kmap_pte-idx, vaddr);
 
-        arch_flush_lazy_mmu_mode();
         pagefault_enable();
 }
 EXPORT_SYMBOL_GPL(iounmap_atomic);