sched/headers, mm: Move 'struct tlbflush_unmap_batch' from <linux/sched.h> to <linux...

[linux-2.6-microblaze.git] / include / linux / mm_types_task.h

diff --git a/include/linux/mm_types_task.h b/include/linux/mm_types_task.h
index 9526d8b..136dfdf 100644 (file)
--- a/include/linux/mm_types_task.h
+++ b/include/linux/mm_types_task.h
@@ -10,6 +10,7 @@
 #include <linux/types.h>
 #include <linux/threads.h>
 #include <linux/atomic.h>
+#include <linux/cpumask.h>
 
 #include <asm/page.h>
 
@@ -62,4 +63,25 @@ struct page_frag {
 #endif
 };
 
+/* Track pages that require TLB flushes */
+struct tlbflush_unmap_batch {
+#ifdef CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH
+       /*
+        * 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;
+#endif
+};
+
 #endif /* _LINUX_MM_TYPES_TASK_H */