Merge branch 'akpm' (incoming from Andrew)

Merge second patch-bomb from Andrew Morton:
 - various misc bits
 - the rest of MM
 - add generic fixmap.h, use it
 - backlight updates
 - dynamic_debug updates
 - printk() updates
 - checkpatch updates
 - binfmt_elf
 - ramfs
 - init/
 - autofs4
 - drivers/rtc
 - nilfs
 - hfsplus
 - Documentation/
 - coredump
 - procfs
 - fork
 - exec
 - kexec
 - kdump
 - partitions
 - rapidio
 - rbtree
 - userns
 - memstick
 - w1
 - decompressors

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (197 commits)
  lib/decompress_unlz4.c: always set an error return code on failures
  romfs: fix returm err while getting inode in fill_super
  drivers/w1/masters/w1-gpio.c: add strong pullup emulation
  drivers/memstick/host/rtsx_pci_ms.c: fix ms card data transfer bug
  userns: relax the posix_acl_valid() checks
  arch/sh/kernel/dwarf.c: use rbtree postorder iteration helper instead of solution using repeated rb_erase()
  fs-ext3-use-rbtree-postorder-iteration-helper-instead-of-opencoding-fix
  fs/ext3: use rbtree postorder iteration helper instead of opencoding
  fs/jffs2: use rbtree postorder iteration helper instead of opencoding
  fs/ext4: use rbtree postorder iteration helper instead of opencoding
  fs/ubifs: use rbtree postorder iteration helper instead of opencoding
  net/netfilter/ipset/ip_set_hash_netiface.c: use rbtree postorder iteration instead of opencoding
  rbtree/test: test rbtree_postorder_for_each_entry_safe()
  rbtree/test: move rb_node to the middle of the test struct
  rapidio: add modular rapidio core build into powerpc and mips branches
  partitions/efi: complete documentation of gpt kernel param purpose
  kdump: add /sys/kernel/vmcoreinfo ABI documentation
  kdump: fix exported size of vmcoreinfo note
  kexec: add sysctl to disable kexec_load
  fs/exec.c: call arch_pick_mmap_layout() only once
  ...

1 files changed, 16 insertions, 13 deletions

diff --git a/mm/memblock.c b/mm/memblock.c
index 1c2ef2c7edab..9c0aeef19440 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -266,31 +266,34 @@ static void __init_memblock memblock_remove_region(struct memblock_type *type, u
         }
 }
 
+#ifdef CONFIG_ARCH_DISCARD_MEMBLOCK
+
 phys_addr_t __init_memblock get_allocated_memblock_reserved_regions_info(
                                         phys_addr_t *addr)
 {
         if (memblock.reserved.regions == memblock_reserved_init_regions)
                 return 0;
 
-        /*
-         * Don't allow nobootmem allocator to free reserved memory regions
-         * array if
-         *  - CONFIG_DEBUG_FS is enabled;
-         *  - CONFIG_ARCH_DISCARD_MEMBLOCK is not enabled;
-         *  - reserved memory regions array have been resized during boot.
-         * Otherwise debug_fs entry "sys/kernel/debug/memblock/reserved"
-         * will show garbage instead of state of memory reservations.
-         */
-        if (IS_ENABLED(CONFIG_DEBUG_FS) &&
-            !IS_ENABLED(CONFIG_ARCH_DISCARD_MEMBLOCK))
-                return 0;
-
         *addr = __pa(memblock.reserved.regions);
 
         return PAGE_ALIGN(sizeof(struct memblock_region) *
                           memblock.reserved.max);
 }
 
+phys_addr_t __init_memblock get_allocated_memblock_memory_regions_info(
+                                        phys_addr_t *addr)
+{
+        if (memblock.memory.regions == memblock_memory_init_regions)
+                return 0;
+
+        *addr = __pa(memblock.memory.regions);
+
+        return PAGE_ALIGN(sizeof(struct memblock_region) *
+                          memblock.memory.max);
+}
+
+#endif
+
 /**
  * memblock_double_array - double the size of the memblock regions array
  * @type: memblock type of the regions array being doubled