Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...

[firefly-linux-kernel-4.4.55.git] / include / linux / sched.h

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 119823decc4631eb26842df9fd7a9a1e63709577..a4ab9daa387c0bbcaca1923620ceb2ed74bfd84e 100644 (file)
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1344,6 +1344,25 @@ enum perf_event_task_context {
        perf_nr_task_contexts,
 };
 
+/* Track pages that require TLB flushes */
+struct tlbflush_unmap_batch {
+       /*
+        * Each bit set is a CPU that potentially has a TLB entry for one of
+        * the PFNs being flushed. See set_tlb_ubc_flush_pending().
+        */
+       struct cpumask cpumask;
+
+       /* True if any bit in cpumask is set */
+       bool flush_required;
+
+       /*
+        * If true then the PTE was dirty when unmapped. The entry must be
+        * flushed before IO is initiated or a stale TLB entry potentially
+        * allows an update without redirtying the page.
+        */
+       bool writable;
+};
+
 struct task_struct {
        volatile long state;    /* -1 unrunnable, 0 runnable, >0 stopped */
        void *stack;
@@ -1700,6 +1719,10 @@ struct task_struct {
        unsigned long numa_pages_migrated;
 #endif /* CONFIG_NUMA_BALANCING */
 
+#ifdef CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH
+       struct tlbflush_unmap_batch tlb_ubc;
+#endif
+
        struct rcu_head rcu;
 
        /*