1 files changed, 39 insertions, 7 deletions

diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c
index 1373fae7657f..f225dd72968b 100644
--- a/arch/ia64/mm/init.c
+++ b/arch/ia64/mm/init.c
@@ -19,6 +19,7 @@
 #include <linux/swap.h>
 #include <linux/proc_fs.h>
 #include <linux/bitops.h>
+#include <linux/kexec.h>
 
 #include <asm/a.out.h>
 #include <asm/dma.h>
@@ -67,7 +68,7 @@ max_pgt_pages(void)
 #ifndef	CONFIG_NUMA
 	node_free_pages = nr_free_pages();
 #else
-	node_free_pages = nr_free_pages_pgdat(NODE_DATA(numa_node_id()));
+	node_free_pages = node_page_state(numa_node_id(), NR_FREE_PAGES);
 #endif
 	max_pgt_pages = node_free_pages / PGT_FRACTION_OF_NODE_MEM;
 	max_pgt_pages = max(max_pgt_pages, MIN_PGT_PAGES);
@@ -128,6 +129,25 @@ lazy_mmu_prot_update (pte_t pte)
 	set_bit(PG_arch_1, &page->flags);	/* mark page as clean */
 }
 
+/*
+ * Since DMA is i-cache coherent, any (complete) pages that were written via
+ * DMA can be marked as "clean" so that lazy_mmu_prot_update() doesn't have to
+ * flush them when they get mapped into an executable vm-area.
+ */
+void
+dma_mark_clean(void *addr, size_t size)
+{
+	unsigned long pg_addr, end;
+
+	pg_addr = PAGE_ALIGN((unsigned long) addr);
+	end = (unsigned long) addr + size;
+	while (pg_addr + PAGE_SIZE <= end) {
+		struct page *page = virt_to_page(pg_addr);
+		set_bit(PG_arch_1, &page->flags);
+		pg_addr += PAGE_SIZE;
+	}
+}
+
 inline void
 ia64_set_rbs_bot (void)
 {
@@ -156,9 +176,8 @@ ia64_init_addr_space (void)
 	 * the problem.  When the process attempts to write to the register backing store
 	 * for the first time, it will get a SEGFAULT in this case.
 	 */
-	vma = kmem_cache_alloc(vm_area_cachep, GFP_KERNEL);
+	vma = kmem_cache_zalloc(vm_area_cachep, GFP_KERNEL);
 	if (vma) {
-		memset(vma, 0, sizeof(*vma));
 		vma->vm_mm = current->mm;
 		vma->vm_start = current->thread.rbs_bot & PAGE_MASK;
 		vma->vm_end = vma->vm_start + PAGE_SIZE;
@@ -175,9 +194,8 @@ ia64_init_addr_space (void)
 
 	/* map NaT-page at address zero to speed up speculative dereferencing of NULL: */
 	if (!(current->personality & MMAP_PAGE_ZERO)) {
-		vma = kmem_cache_alloc(vm_area_cachep, GFP_KERNEL);
+		vma = kmem_cache_zalloc(vm_area_cachep, GFP_KERNEL);
 		if (vma) {
-			memset(vma, 0, sizeof(*vma));
 			vma->vm_mm = current->mm;
 			vma->vm_end = PAGE_SIZE;
 			vma->vm_page_prot = __pgprot(pgprot_val(PAGE_READONLY) | _PAGE_MA_NAT);
@@ -595,13 +613,27 @@ find_largest_hole (u64 start, u64 end, void *arg)
 	return 0;
 }
 
+#endif /* CONFIG_VIRTUAL_MEM_MAP */
+
 int __init
 register_active_ranges(u64 start, u64 end, void *arg)
 {
-	add_active_range(0, __pa(start) >> PAGE_SHIFT, __pa(end) >> PAGE_SHIFT);
+	int nid = paddr_to_nid(__pa(start));
+
+	if (nid < 0)
+		nid = 0;
+#ifdef CONFIG_KEXEC
+	if (start > crashk_res.start && start < crashk_res.end)
+		start = crashk_res.end;
+	if (end > crashk_res.start && end < crashk_res.end)
+		end = crashk_res.start;
+#endif
+
+	if (start < end)
+		add_active_range(nid, __pa(start) >> PAGE_SHIFT,
+			__pa(end) >> PAGE_SHIFT);
 	return 0;
 }
-#endif /* CONFIG_VIRTUAL_MEM_MAP */
 
 static int __init
 count_reserved_pages (u64 start, u64 end, void *arg)