Merge branch 'akpm' (patches from Andrew)

Merge second patch-bomb from Andrew Morton:

 - a couple of hotfixes

 - the rest of MM

 - a new timer slack control in procfs

 - a couple of procfs fixes

 - a few misc things

 - some printk tweaks

 - lib/ updates, notably to radix-tree.

 - add my and Nick Piggin's old userspace radix-tree test harness to
   tools/testing/radix-tree/.  Matthew said it was a godsend during the
   radix-tree work he did.

 - a few code-size improvements, switching to __always_inline where gcc
   screwed up.

 - partially implement character sets in sscanf

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (118 commits)
  sscanf: implement basic character sets
  lib/bug.c: use common WARN helper
  param: convert some "on"/"off" users to strtobool
  lib: add "on"/"off" support to kstrtobool
  lib: update single-char callers of strtobool()
  lib: move strtobool() to kstrtobool()
  include/linux/unaligned: force inlining of byteswap operations
  include/uapi/linux/byteorder, swab: force inlining of some byteswap operations
  include/asm-generic/atomic-long.h: force inlining of some atomic_long operations
  usb: common: convert to use match_string() helper
  ide: hpt366: convert to use match_string() helper
  ata: hpt366: convert to use match_string() helper
  power: ab8500: convert to use match_string() helper
  power: charger_manager: convert to use match_string() helper
  drm/edid: convert to use match_string() helper
  pinctrl: convert to use match_string() helper
  device property: convert to use match_string() helper
  lib/string: introduce match_string() helper
  radix-tree tests: add test for radix_tree_iter_next
  radix-tree tests: add regression3 test
  ...

1 files changed, 16 insertions, 13 deletions

diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index 2d7c4c1..e72efb10 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -281,7 +281,6 @@ struct mapping_area {
 #endif
 	char *vm_addr; /* address of kmap_atomic()'ed pages */
 	enum zs_mapmode vm_mm; /* mapping mode */
-	bool huge;
 };
 
 static int create_handle_cache(struct zs_pool *pool)
@@ -495,6 +494,8 @@ static void __exit zs_stat_exit(void)
 	debugfs_remove_recursive(zs_stat_root);
 }
 
+static unsigned long zs_can_compact(struct size_class *class);
+
 static int zs_stats_size_show(struct seq_file *s, void *v)
 {
 	int i;
@@ -502,14 +503,15 @@ static int zs_stats_size_show(struct seq_file *s, void *v)
 	struct size_class *class;
 	int objs_per_zspage;
 	unsigned long class_almost_full, class_almost_empty;
-	unsigned long obj_allocated, obj_used, pages_used;
+	unsigned long obj_allocated, obj_used, pages_used, freeable;
 	unsigned long total_class_almost_full = 0, total_class_almost_empty = 0;
 	unsigned long total_objs = 0, total_used_objs = 0, total_pages = 0;
+	unsigned long total_freeable = 0;
 
-	seq_printf(s, " %5s %5s %11s %12s %13s %10s %10s %16s\n",
+	seq_printf(s, " %5s %5s %11s %12s %13s %10s %10s %16s %8s\n",
 			"class", "size", "almost_full", "almost_empty",
 			"obj_allocated", "obj_used", "pages_used",
-			"pages_per_zspage");
+			"pages_per_zspage", "freeable");
 
 	for (i = 0; i < zs_size_classes; i++) {
 		class = pool->size_class[i];
@@ -522,6 +524,7 @@ static int zs_stats_size_show(struct seq_file *s, void *v)
 		class_almost_empty = zs_stat_get(class, CLASS_ALMOST_EMPTY);
 		obj_allocated = zs_stat_get(class, OBJ_ALLOCATED);
 		obj_used = zs_stat_get(class, OBJ_USED);
+		freeable = zs_can_compact(class);
 		spin_unlock(&class->lock);
 
 		objs_per_zspage = get_maxobj_per_zspage(class->size,
@@ -529,23 +532,25 @@ static int zs_stats_size_show(struct seq_file *s, void *v)
 		pages_used = obj_allocated / objs_per_zspage *
 				class->pages_per_zspage;
 
-		seq_printf(s, " %5u %5u %11lu %12lu %13lu %10lu %10lu %16d\n",
+		seq_printf(s, " %5u %5u %11lu %12lu %13lu"
+				" %10lu %10lu %16d %8lu\n",
 			i, class->size, class_almost_full, class_almost_empty,
 			obj_allocated, obj_used, pages_used,
-			class->pages_per_zspage);
+			class->pages_per_zspage, freeable);
 
 		total_class_almost_full += class_almost_full;
 		total_class_almost_empty += class_almost_empty;
 		total_objs += obj_allocated;
 		total_used_objs += obj_used;
 		total_pages += pages_used;
+		total_freeable += freeable;
 	}
 
 	seq_puts(s, "\n");
-	seq_printf(s, " %5s %5s %11lu %12lu %13lu %10lu %10lu\n",
+	seq_printf(s, " %5s %5s %11lu %12lu %13lu %10lu %10lu %16s %8lu\n",
 			"Total", "", total_class_almost_full,
 			total_class_almost_empty, total_objs,
-			total_used_objs, total_pages);
+			total_used_objs, total_pages, "", total_freeable);
 
 	return 0;
 }
@@ -1127,11 +1132,9 @@ static void __zs_unmap_object(struct mapping_area *area,
 		goto out;
 
 	buf = area->vm_buf;
-	if (!area->huge) {
-		buf = buf + ZS_HANDLE_SIZE;
-		size -= ZS_HANDLE_SIZE;
-		off += ZS_HANDLE_SIZE;
-	}
+	buf = buf + ZS_HANDLE_SIZE;
+	size -= ZS_HANDLE_SIZE;
+	off += ZS_HANDLE_SIZE;
 
 	sizes[0] = PAGE_SIZE - off;
 	sizes[1] = size - sizes[0];