Merge remote-tracking branch 'origin/next' into kvm-ppc-next

Conflicts:
	mm/Kconfig

CMA DMA split and ZSWAP introduction were conflicting, fix up manually.

7 files changed, 19 insertions, 86 deletions

diff --git a/arch/x86/mm/highmem_32.c b/arch/x86/mm/highmem_32.c
index 252b8f5489ba..4500142bc4aa 100644
--- a/arch/x86/mm/highmem_32.c
+++ b/arch/x86/mm/highmem_32.c
@@ -1,6 +1,7 @@
 #include <linux/highmem.h>
 #include <linux/module.h>
 #include <linux/swap.h> /* for totalram_pages */
+#include <linux/bootmem.h>
 
 void *kmap(struct page *page)
 {
@@ -121,6 +122,11 @@ void __init set_highmem_pages_init(void)
 	struct zone *zone;
 	int nid;
 
+	/*
+	 * Explicitly reset zone->managed_pages because set_highmem_pages_init()
+	 * is invoked before free_all_bootmem()
+	 */
+	reset_all_zones_managed_pages();
 	for_each_zone(zone) {
 		unsigned long zone_start_pfn, zone_end_pfn;
 
diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
index 1f34e9219775..2ec29ac78ae6 100644
--- a/arch/x86/mm/init.c
+++ b/arch/x86/mm/init.c
@@ -494,7 +494,6 @@ int devmem_is_allowed(unsigned long pagenr)
 
 void free_init_pages(char *what, unsigned long begin, unsigned long end)
 {
-	unsigned long addr;
 	unsigned long begin_aligned, end_aligned;
 
 	/* Make sure boundaries are page aligned */
@@ -509,8 +508,6 @@ void free_init_pages(char *what, unsigned long begin, unsigned long end)
 	if (begin >= end)
 		return;
 
-	addr = begin;
-
 	/*
 	 * If debugging page accesses then do not free this memory but
 	 * mark them not present - any buggy init-section access will
@@ -529,18 +526,13 @@ void free_init_pages(char *what, unsigned long begin, unsigned long end)
 	set_memory_nx(begin, (end - begin) >> PAGE_SHIFT);
 	set_memory_rw(begin, (end - begin) >> PAGE_SHIFT);
 
-	printk(KERN_INFO "Freeing %s: %luk freed\n", what, (end - begin) >> 10);
-
-	for (; addr < end; addr += PAGE_SIZE) {
-		memset((void *)addr, POISON_FREE_INITMEM, PAGE_SIZE);
-		free_reserved_page(virt_to_page(addr));
-	}
+	free_reserved_area((void *)begin, (void *)end, POISON_FREE_INITMEM, what);
 #endif
 }
 
 void free_initmem(void)
 {
-	free_init_pages("unused kernel memory",
+	free_init_pages("unused kernel",
 			(unsigned long)(&__init_begin),
 			(unsigned long)(&__init_end));
 }
@@ -566,7 +558,7 @@ void __init free_initrd_mem(unsigned long start, unsigned long end)
 	 *   - relocate_initrd()
 	 * So here We can do PAGE_ALIGN() safely to get partial page to be freed
 	 */
-	free_init_pages("initrd memory", start, PAGE_ALIGN(end));
+	free_init_pages("initrd", start, PAGE_ALIGN(end));
 }
 #endif
 
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index 3ac7e319918d..4287f1ffba7e 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -660,10 +660,8 @@ void __init initmem_init(void)
 		highstart_pfn = max_low_pfn;
 	printk(KERN_NOTICE "%ldMB HIGHMEM available.\n",
 		pages_to_mb(highend_pfn - highstart_pfn));
-	num_physpages = highend_pfn;
 	high_memory = (void *) __va(highstart_pfn * PAGE_SIZE - 1) + 1;
 #else
-	num_physpages = max_low_pfn;
 	high_memory = (void *) __va(max_low_pfn * PAGE_SIZE - 1) + 1;
 #endif
 
@@ -671,7 +669,7 @@ void __init initmem_init(void)
 	sparse_memory_present_with_active_regions(0);
 
 #ifdef CONFIG_FLATMEM
-	max_mapnr = num_physpages;
+	max_mapnr = IS_ENABLED(CONFIG_HIGHMEM) ? highend_pfn : max_low_pfn;
 #endif
 	__vmalloc_start_set = true;
 
@@ -739,9 +737,6 @@ static void __init test_wp_bit(void)
 
 void __init mem_init(void)
 {
-	int codesize, reservedpages, datasize, initsize;
-	int tmp;
-
 	pci_iommu_alloc();
 
 #ifdef CONFIG_FLATMEM
@@ -759,32 +754,11 @@ void __init mem_init(void)
 	set_highmem_pages_init();
 
 	/* this will put all low memory onto the freelists */
-	totalram_pages += free_all_bootmem();
-
-	reservedpages = 0;
-	for (tmp = 0; tmp < max_low_pfn; tmp++)
-		/*
-		 * Only count reserved RAM pages:
-		 */
-		if (page_is_ram(tmp) && PageReserved(pfn_to_page(tmp)))
-			reservedpages++;
+	free_all_bootmem();
 
 	after_bootmem = 1;
 
-	codesize =  (unsigned long) &_etext - (unsigned long) &_text;
-	datasize =  (unsigned long) &_edata - (unsigned long) &_etext;
-	initsize =  (unsigned long) &__init_end - (unsigned long) &__init_begin;
-
-	printk(KERN_INFO "Memory: %luk/%luk available (%dk kernel code, "
-			"%dk reserved, %dk data, %dk init, %ldk highmem)\n",
-		nr_free_pages() << (PAGE_SHIFT-10),
-		num_physpages << (PAGE_SHIFT-10),
-		codesize >> 10,
-		reservedpages << (PAGE_SHIFT-10),
-		datasize >> 10,
-		initsize >> 10,
-		totalhigh_pages << (PAGE_SHIFT-10));
-
+	mem_init_print_info(NULL);
 	printk(KERN_INFO "virtual kernel memory layout:\n"
 		"    fixmap  : 0x%08lx - 0x%08lx   (%4ld kB)\n"
 #ifdef CONFIG_HIGHMEM
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index b3940b6b4d7e..104d56a9245f 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -712,36 +712,22 @@ EXPORT_SYMBOL_GPL(arch_add_memory);
 
 static void __meminit free_pagetable(struct page *page, int order)
 {
-	struct zone *zone;
-	bool bootmem = false;
 	unsigned long magic;
 	unsigned int nr_pages = 1 << order;
 
 	/* bootmem page has reserved flag */
 	if (PageReserved(page)) {
 		__ClearPageReserved(page);
-		bootmem = true;
 
 		magic = (unsigned long)page->lru.next;
 		if (magic == SECTION_INFO || magic == MIX_SECTION_INFO) {
 			while (nr_pages--)
 				put_page_bootmem(page++);
 		} else
-			__free_pages_bootmem(page, order);
+			while (nr_pages--)
+				free_reserved_page(page++);
 	} else
 		free_pages((unsigned long)page_address(page), order);
-
-	/*
-	 * SECTION_INFO pages and MIX_SECTION_INFO pages
-	 * are all allocated by bootmem.
-	 */
-	if (bootmem) {
-		zone = page_zone(page);
-		zone_span_writelock(zone);
-		zone->present_pages += nr_pages;
-		zone_span_writeunlock(zone);
-		totalram_pages += nr_pages;
-	}
 }
 
 static void __meminit free_pte_table(pte_t *pte_start, pmd_t *pmd)
@@ -1058,9 +1044,6 @@ static void __init register_page_bootmem_info(void)
 
 void __init mem_init(void)
 {
-	long codesize, reservedpages, datasize, initsize;
-	unsigned long absent_pages;
-
 	pci_iommu_alloc();
 
 	/* clear_bss() already clear the empty_zero_page */
@@ -1068,29 +1051,14 @@ void __init mem_init(void)
 	register_page_bootmem_info();
 
 	/* this will put all memory onto the freelists */
-	totalram_pages = free_all_bootmem();
-
-	absent_pages = absent_pages_in_range(0, max_pfn);
-	reservedpages = max_pfn - totalram_pages - absent_pages;
+	free_all_bootmem();
 	after_bootmem = 1;
 
-	codesize =  (unsigned long) &_etext - (unsigned long) &_text;
-	datasize =  (unsigned long) &_edata - (unsigned long) &_etext;
-	initsize =  (unsigned long) &__init_end - (unsigned long) &__init_begin;
-
 	/* Register memory areas for /proc/kcore */
 	kclist_add(&kcore_vsyscall, (void *)VSYSCALL_START,
 			 VSYSCALL_END - VSYSCALL_START, KCORE_OTHER);
 
-	printk(KERN_INFO "Memory: %luk/%luk available (%ldk kernel code, "
-			 "%ldk absent, %ldk reserved, %ldk data, %ldk init)\n",
-		nr_free_pages() << (PAGE_SHIFT-10),
-		max_pfn << (PAGE_SHIFT-10),
-		codesize >> 10,
-		absent_pages << (PAGE_SHIFT-10),
-		reservedpages << (PAGE_SHIFT-10),
-		datasize >> 10,
-		initsize >> 10);
+	mem_init_print_info(NULL);
 }
 
 #ifdef CONFIG_DEBUG_RODATA
@@ -1166,11 +1134,10 @@ void mark_rodata_ro(void)
 	set_memory_ro(start, (end-start) >> PAGE_SHIFT);
 #endif
 
-	free_init_pages("unused kernel memory",
+	free_init_pages("unused kernel",
 			(unsigned long) __va(__pa_symbol(text_end)),
 			(unsigned long) __va(__pa_symbol(rodata_start)));
-
-	free_init_pages("unused kernel memory",
+	free_init_pages("unused kernel",
 			(unsigned long) __va(__pa_symbol(rodata_end)),
 			(unsigned long) __va(__pa_symbol(_sdata)));
 }
diff --git a/arch/x86/mm/mmap.c b/arch/x86/mm/mmap.c
index 845df6835f9f..62c29a5bfe26 100644
--- a/arch/x86/mm/mmap.c
+++ b/arch/x86/mm/mmap.c
@@ -115,10 +115,8 @@ void arch_pick_mmap_layout(struct mm_struct *mm)
 	if (mmap_is_legacy()) {
 		mm->mmap_base = mmap_legacy_base();
 		mm->get_unmapped_area = arch_get_unmapped_area;
-		mm->unmap_area = arch_unmap_area;
 	} else {
 		mm->mmap_base = mmap_base();
 		mm->get_unmapped_area = arch_get_unmapped_area_topdown;
-		mm->unmap_area = arch_unmap_area_topdown;
 	}
 }
diff --git a/arch/x86/mm/numa_32.c b/arch/x86/mm/numa_32.c
index 73a6d7395bd3..0342d27ca798 100644
--- a/arch/x86/mm/numa_32.c
+++ b/arch/x86/mm/numa_32.c
@@ -83,10 +83,8 @@ void __init initmem_init(void)
 		highstart_pfn = max_low_pfn;
 	printk(KERN_NOTICE "%ldMB HIGHMEM available.\n",
 	       pages_to_mb(highend_pfn - highstart_pfn));
-	num_physpages = highend_pfn;
 	high_memory = (void *) __va(highstart_pfn * PAGE_SIZE - 1) + 1;
 #else
-	num_physpages = max_low_pfn;
 	high_memory = (void *) __va(max_low_pfn * PAGE_SIZE - 1) + 1;
 #endif
 	printk(KERN_NOTICE "%ldMB LOWMEM available.\n",
diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c
index 17fda6a8b3c2..dfa537a03be1 100644
--- a/arch/x86/mm/pgtable.c
+++ b/arch/x86/mm/pgtable.c
@@ -240,7 +240,6 @@ static void pgd_mop_up_pmds(struct mm_struct *mm, pgd_t *pgdp)
 static void pgd_prepopulate_pmd(struct mm_struct *mm, pgd_t *pgd, pmd_t *pmds[])
 {
 	pud_t *pud;
-	unsigned long addr;
 	int i;
 
 	if (PREALLOCATED_PMDS == 0) /* Work around gcc-3.4.x bug */
@@ -248,8 +247,7 @@ static void pgd_prepopulate_pmd(struct mm_struct *mm, pgd_t *pgd, pmd_t *pmds[])
 
 	pud = pud_offset(pgd, 0);
 
- 	for (addr = i = 0; i < PREALLOCATED_PMDS;
-	     i++, pud++, addr += PUD_SIZE) {
+	for (i = 0; i < PREALLOCATED_PMDS; i++, pud++) {
 		pmd_t *pmd = pmds[i];
 
 		if (i >= KERNEL_PGD_BOUNDARY)