Merge commit '8700c95adb03' into timers/nohz

The full dynticks tree needs the latest RCU and sched
upstream updates in order to fix some dependencies.

Merge a common upstream merge point that has these
updates.

Conflicts:
	include/linux/perf_event.h
	kernel/rcutree.h
	kernel/rcutree_plugin.h

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>

1 files changed, 4 insertions, 22 deletions

diff --git a/arch/um/kernel/mem.c b/arch/um/kernel/mem.c
index 5abcbfbe7e25..9df292b270a8 100644
--- a/arch/um/kernel/mem.c
+++ b/arch/um/kernel/mem.c
@@ -42,17 +42,12 @@ static unsigned long brk_end;
 static void setup_highmem(unsigned long highmem_start,
 			  unsigned long highmem_len)
 {
-	struct page *page;
 	unsigned long highmem_pfn;
 	int i;
 
 	highmem_pfn = __pa(highmem_start) >> PAGE_SHIFT;
-	for (i = 0; i < highmem_len >> PAGE_SHIFT; i++) {
-		page = &mem_map[highmem_pfn + i];
-		ClearPageReserved(page);
-		init_page_count(page);
-		__free_page(page);
-	}
+	for (i = 0; i < highmem_len >> PAGE_SHIFT; i++)
+		free_highmem_page(&mem_map[highmem_pfn + i]);
 }
 #endif
 
@@ -73,18 +68,13 @@ void __init mem_init(void)
 	totalram_pages = free_all_bootmem();
 	max_low_pfn = totalram_pages;
 #ifdef CONFIG_HIGHMEM
-	totalhigh_pages = highmem >> PAGE_SHIFT;
-	totalram_pages += totalhigh_pages;
+	setup_highmem(end_iomem, highmem);
 #endif
 	num_physpages = totalram_pages;
 	max_pfn = totalram_pages;
 	printk(KERN_INFO "Memory: %luk available\n",
 	       nr_free_pages() << (PAGE_SHIFT-10));
 	kmalloc_ok = 1;
-
-#ifdef CONFIG_HIGHMEM
-	setup_highmem(end_iomem, highmem);
-#endif
 }
 
 /*
@@ -254,15 +244,7 @@ void free_initmem(void)
 #ifdef CONFIG_BLK_DEV_INITRD
 void free_initrd_mem(unsigned long start, unsigned long end)
 {
-	if (start < end)
-		printk(KERN_INFO "Freeing initrd memory: %ldk freed\n",
-		       (end - start) >> 10);
-	for (; start < end; start += PAGE_SIZE) {
-		ClearPageReserved(virt_to_page(start));
-		init_page_count(virt_to_page(start));
-		free_page(start);
-		totalram_pages++;
-	}
+	free_reserved_area(start, end, 0, "initrd");
 }
 #endif