Merge branch 'akpm' (patches from Andrew)

Merge yet more updates from Andrew Morton:

 - Almost all of the rest of MM (memcg, slab-generic, slab, pagealloc,
   gup, hugetlb, pagemap, memremap)

 - Various other things (hfs, ocfs2, kmod, misc, seqfile)

* akpm: (34 commits)
  ipc/util.c: sysvipc_find_ipc() should increase position index
  kernel/gcov/fs.c: gcov_seq_next() should increase position index
  fs/seq_file.c: seq_read(): add info message about buggy .next functions
  drivers/dma/tegra20-apb-dma.c: fix platform_get_irq.cocci warnings
  change email address for Pali Rohár
  selftests: kmod: test disabling module autoloading
  selftests: kmod: fix handling test numbers above 9
  docs: admin-guide: document the kernel.modprobe sysctl
  fs/filesystems.c: downgrade user-reachable WARN_ONCE() to pr_warn_once()
  kmod: make request_module() return an error when autoloading is disabled
  mm/memremap: set caching mode for PCI P2PDMA memory to WC
  mm/memory_hotplug: add pgprot_t to mhp_params
  powerpc/mm: thread pgprot_t through create_section_mapping()
  x86/mm: introduce __set_memory_prot()
  x86/mm: thread pgprot_t through init_memory_mapping()
  mm/memory_hotplug: rename mhp_restrictions to mhp_params
  mm/memory_hotplug: drop the flags field from struct mhp_restrictions
  mm/special: create generic fallbacks for pte_special() and pte_mkspecial()
  mm/vma: introduce VM_ACCESS_FLAGS
  mm/vma: define a default value for VM_DATA_DEFAULT_FLAGS
  ...

7 files changed, 73 insertions, 15 deletions

diff --git a/include/linux/cma.h b/include/linux/cma.h
index 190184b5ff32..6ff79fefd01f 100644
--- a/include/linux/cma.h
+++ b/include/linux/cma.h
@@ -4,6 +4,7 @@
 
 #include <linux/init.h>
 #include <linux/types.h>
+#include <linux/numa.h>
 
 /*
  * There is always at least global CMA area and a few optional
@@ -24,10 +25,19 @@ extern phys_addr_t cma_get_base(const struct cma *cma);
 extern unsigned long cma_get_size(const struct cma *cma);
 extern const char *cma_get_name(const struct cma *cma);
 
-extern int __init cma_declare_contiguous(phys_addr_t base,
+extern int __init cma_declare_contiguous_nid(phys_addr_t base,
 			phys_addr_t size, phys_addr_t limit,
 			phys_addr_t alignment, unsigned int order_per_bit,
-			bool fixed, const char *name, struct cma **res_cma);
+			bool fixed, const char *name, struct cma **res_cma,
+			int nid);
+static inline int __init cma_declare_contiguous(phys_addr_t base,
+			phys_addr_t size, phys_addr_t limit,
+			phys_addr_t alignment, unsigned int order_per_bit,
+			bool fixed, const char *name, struct cma **res_cma)
+{
+	return cma_declare_contiguous_nid(base, size, limit, alignment,
+			order_per_bit, fixed, name, res_cma, NUMA_NO_NODE);
+}
 extern int cma_init_reserved_mem(phys_addr_t base, phys_addr_t size,
 					unsigned int order_per_bit,
 					const char *name,
diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index 5ea05879a0a9..43a1cef8f0f1 100644
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -895,4 +895,16 @@ static inline spinlock_t *huge_pte_lock(struct hstate *h,
 	return ptl;
 }
 
+#if defined(CONFIG_HUGETLB_PAGE) && defined(CONFIG_CMA)
+extern void __init hugetlb_cma_reserve(int order);
+extern void __init hugetlb_cma_check(void);
+#else
+static inline __init void hugetlb_cma_reserve(int order)
+{
+}
+static inline __init void hugetlb_cma_check(void)
+{
+}
+#endif
+
 #endif /* _LINUX_HUGETLB_H */
diff --git a/include/linux/memblock.h b/include/linux/memblock.h
index 079d17d96410..6bc37a731d27 100644
--- a/include/linux/memblock.h
+++ b/include/linux/memblock.h
@@ -348,6 +348,9 @@ static inline int memblock_get_region_node(const struct memblock_region *r)
 
 phys_addr_t memblock_phys_alloc_range(phys_addr_t size, phys_addr_t align,
 				      phys_addr_t start, phys_addr_t end);
+phys_addr_t memblock_alloc_range_nid(phys_addr_t size,
+				      phys_addr_t align, phys_addr_t start,
+				      phys_addr_t end, int nid, bool exact_nid);
 phys_addr_t memblock_phys_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid);
 
 static inline phys_addr_t memblock_phys_alloc(phys_addr_t size,
diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h
index ef55115320fb..93d9ada74ddd 100644
--- a/include/linux/memory_hotplug.h
+++ b/include/linux/memory_hotplug.h
@@ -58,13 +58,14 @@ enum {
 };
 
 /*
- * Restrictions for the memory hotplug:
- * flags:  MHP_ flags
- * altmap: alternative allocator for memmap array
+ * Extended parameters for memory hotplug:
+ * altmap: alternative allocator for memmap array (optional)
+ * pgprot: page protection flags to apply to newly created page tables
+ *	(required)
  */
-struct mhp_restrictions {
-	unsigned long flags;
+struct mhp_params {
 	struct vmem_altmap *altmap;
+	pgprot_t pgprot;
 };
 
 /*
@@ -114,7 +115,7 @@ extern int restore_online_page_callback(online_page_callback_t callback);
 extern int try_online_node(int nid);
 
 extern int arch_add_memory(int nid, u64 start, u64 size,
-			struct mhp_restrictions *restrictions);
+			   struct mhp_params *params);
 extern u64 max_mem_size;
 
 extern int memhp_online_type_from_str(const char *str);
@@ -135,17 +136,17 @@ extern void __remove_pages(unsigned long start_pfn, unsigned long nr_pages,
 
 /* reasonably generic interface to expand the physical pages */
 extern int __add_pages(int nid, unsigned long start_pfn, unsigned long nr_pages,
-		       struct mhp_restrictions *restrictions);
+		       struct mhp_params *params);
 
 #ifndef CONFIG_ARCH_HAS_ADD_PAGES
 static inline int add_pages(int nid, unsigned long start_pfn,
-		unsigned long nr_pages, struct mhp_restrictions *restrictions)
+		unsigned long nr_pages, struct mhp_params *params)
 {
-	return __add_pages(nid, start_pfn, nr_pages, restrictions);
+	return __add_pages(nid, start_pfn, nr_pages, params);
 }
 #else /* ARCH_HAS_ADD_PAGES */
 int add_pages(int nid, unsigned long start_pfn, unsigned long nr_pages,
-	      struct mhp_restrictions *restrictions);
+	      struct mhp_params *params);
 #endif /* ARCH_HAS_ADD_PAGES */
 
 #ifdef CONFIG_NUMA
diff --git a/include/linux/mm.h b/include/linux/mm.h
index e2f938c5a9d8..5a323422d783 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -343,6 +343,20 @@ extern unsigned int kobjsize(const void *objp);
 /* Bits set in the VMA until the stack is in its final location */
 #define VM_STACK_INCOMPLETE_SETUP	(VM_RAND_READ | VM_SEQ_READ)
 
+#define TASK_EXEC ((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0)
+
+/* Common data flag combinations */
+#define VM_DATA_FLAGS_TSK_EXEC	(VM_READ | VM_WRITE | TASK_EXEC | \
+				 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+#define VM_DATA_FLAGS_NON_EXEC	(VM_READ | VM_WRITE | VM_MAYREAD | \
+				 VM_MAYWRITE | VM_MAYEXEC)
+#define VM_DATA_FLAGS_EXEC	(VM_READ | VM_WRITE | VM_EXEC | \
+				 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+
+#ifndef VM_DATA_DEFAULT_FLAGS		/* arch can override this */
+#define VM_DATA_DEFAULT_FLAGS  VM_DATA_FLAGS_EXEC
+#endif
+
 #ifndef VM_STACK_DEFAULT_FLAGS		/* arch can override this */
 #define VM_STACK_DEFAULT_FLAGS VM_DATA_DEFAULT_FLAGS
 #endif
@@ -355,6 +369,10 @@ extern unsigned int kobjsize(const void *objp);
 
 #define VM_STACK_FLAGS	(VM_STACK | VM_STACK_DEFAULT_FLAGS | VM_ACCOUNT)
 
+/* VMA basic access permission flags */
+#define VM_ACCESS_FLAGS (VM_READ | VM_WRITE | VM_EXEC)
+
+
 /*
  * Special vmas that are non-mergable, non-mlock()able.
  */
@@ -632,7 +650,7 @@ static inline bool vma_is_foreign(struct vm_area_struct *vma)
 
 static inline bool vma_is_accessible(struct vm_area_struct *vma)
 {
-	return vma->vm_flags & (VM_READ | VM_WRITE | VM_EXEC);
+	return vma->vm_flags & VM_ACCESS_FLAGS;
 }
 
 #ifdef CONFIG_SHMEM
@@ -1909,6 +1927,18 @@ static inline void sync_mm_rss(struct mm_struct *mm)
 }
 #endif
 
+#ifndef CONFIG_ARCH_HAS_PTE_SPECIAL
+static inline int pte_special(pte_t pte)
+{
+	return 0;
+}
+
+static inline pte_t pte_mkspecial(pte_t pte)
+{
+	return pte;
+}
+#endif
+
 #ifndef CONFIG_ARCH_HAS_PTE_DEVMAP
 static inline int pte_devmap(pte_t pte)
 {
@@ -2689,6 +2719,8 @@ struct vm_area_struct *find_extend_vma(struct mm_struct *, unsigned long addr);
 int remap_pfn_range(struct vm_area_struct *, unsigned long addr,
 			unsigned long pfn, unsigned long size, pgprot_t);
 int vm_insert_page(struct vm_area_struct *, unsigned long addr, struct page *);
+int vm_insert_pages(struct vm_area_struct *vma, unsigned long addr,
+			struct page **pages, unsigned long *num);
 int vm_map_pages(struct vm_area_struct *vma, struct page **pages,
 				unsigned long num);
 int vm_map_pages_zero(struct vm_area_struct *vma, struct page **pages,
diff --git a/include/linux/power/bq2415x_charger.h b/include/linux/power/bq2415x_charger.h
index 7a91b357e3ac..4ca08321e251 100644
--- a/include/linux/power/bq2415x_charger.h
+++ b/include/linux/power/bq2415x_charger.h
@@ -2,7 +2,7 @@
 /*
  * bq2415x charger driver
  *
- * Copyright (C) 2011-2013  Pali Rohár <pali.rohar@gmail.com>
+ * Copyright (C) 2011-2013  Pali Rohár <pali@kernel.org>
  */
 
 #ifndef BQ2415X_CHARGER_H
diff --git a/include/linux/slab.h b/include/linux/slab.h
index 03a389358562..6d454886bcaf 100644
--- a/include/linux/slab.h
+++ b/include/linux/slab.h
@@ -501,7 +501,7 @@ static __always_inline void *kmalloc_large(size_t size, gfp_t flags)
  * :ref:`Documentation/core-api/mm-api.rst <mm-api-gfp-flags>`
  *
  * The recommended usage of the @flags is described at
- * :ref:`Documentation/core-api/memory-allocation.rst <memory-allocation>`
+ * :ref:`Documentation/core-api/memory-allocation.rst <memory_allocation>`
  *
  * Below is a brief outline of the most useful GFP flags
  *