Merge branch 'akpm' (more patches from Andrew)

Merge patches from Andrew Morton:
 "Most of the rest of MM, plus a few dribs and drabs.

  I still have quite a few irritating patches left around: ones with
  dubious testing results, lack of review, ones which should have gone
  via maintainer trees but the maintainers are slack, etc.

  I need to be more activist in getting these things wrapped up outside
  the merge window, but they're such a PITA."

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (48 commits)
  mm/vmscan.c: avoid possible deadlock caused by too_many_isolated()
  vmscan: comment too_many_isolated()
  mm/kmemleak.c: remove obsolete simple_strtoul
  mm/memory_hotplug.c: improve comments
  mm/hugetlb: create hugetlb cgroup file in hugetlb_init
  mm/mprotect.c: coding-style cleanups
  Documentation: ABI: /sys/devices/system/node/
  slub: drop mutex before deleting sysfs entry
  memcg: add comments clarifying aspects of cache attribute propagation
  kmem: add slab-specific documentation about the kmem controller
  slub: slub-specific propagation changes
  slab: propagate tunable values
  memcg: aggregate memcg cache values in slabinfo
  memcg/sl[au]b: shrink dead caches
  memcg/sl[au]b: track all the memcg children of a kmem_cache
  memcg: destroy memcg caches
  sl[au]b: allocate objects from memcg cache
  sl[au]b: always get the cache from its page in kmem_cache_free()
  memcg: skip memcg kmem allocations in specified code regions
  memcg: infrastructure to match an allocation to the right cache
  ...

1 files changed, 57 insertions, 10 deletions

diff --git a/arch/x86/platform/iris/iris.c b/arch/x86/platform/iris/iris.c
index 5917eb56b313..e6cb80f620af 100644
--- a/arch/x86/platform/iris/iris.c
+++ b/arch/x86/platform/iris/iris.c
@@ -23,6 +23,7 @@
 
 #include <linux/moduleparam.h>
 #include <linux/module.h>
+#include <linux/platform_device.h>
 #include <linux/kernel.h>
 #include <linux/errno.h>
 #include <linux/delay.h>
@@ -62,29 +63,75 @@ static void iris_power_off(void)
  * by reading its input port and seeing whether the read value is
  * meaningful.
  */
-static int iris_init(void)
+static int iris_probe(struct platform_device *pdev)
 {
-        unsigned char status;
-        if (force != 1) {
-                printk(KERN_ERR "The force parameter has not been set to 1 so the Iris poweroff handler will not be installed.\n");
-                return -ENODEV;
-        }
-        status = inb(IRIS_GIO_INPUT);
+        unsigned char status = inb(IRIS_GIO_INPUT);
         if (status == IRIS_GIO_NODEV) {
-                printk(KERN_ERR "This machine does not seem to be an Iris. Power_off handler not installed.\n");
+                printk(KERN_ERR "This machine does not seem to be an Iris. "
+                        "Power off handler not installed.\n");
                 return -ENODEV;
         }
         old_pm_power_off = pm_power_off;
         pm_power_off = &iris_power_off;
         printk(KERN_INFO "Iris power_off handler installed.\n");
-
         return 0;
 }
 
-static void iris_exit(void)
+static int iris_remove(struct platform_device *pdev)
 {
         pm_power_off = old_pm_power_off;
         printk(KERN_INFO "Iris power_off handler uninstalled.\n");
+        return 0;
+}
+
+static struct platform_driver iris_driver = {
+        .driver         = {
+                .name   = "iris",
+                .owner  = THIS_MODULE,
+        },
+        .probe          = iris_probe,
+        .remove         = iris_remove,
+};
+
+static struct resource iris_resources[] = {
+        {
+                .start  = IRIS_GIO_BASE,
+                .end    = IRIS_GIO_OUTPUT,
+                .flags  = IORESOURCE_IO,
+                .name   = "address"
+        }
+};
+
+static struct platform_device *iris_device;
+
+static int iris_init(void)
+{
+        int ret;
+        if (force != 1) {
+                printk(KERN_ERR "The force parameter has not been set to 1."
+                        " The Iris poweroff handler will not be installed.\n");
+                return -ENODEV;
+        }
+        ret = platform_driver_register(&iris_driver);
+        if (ret < 0) {
+                printk(KERN_ERR "Failed to register iris platform driver: %d\n",
+                        ret);
+                return ret;
+        }
+        iris_device = platform_device_register_simple("iris", (-1),
+                                iris_resources, ARRAY_SIZE(iris_resources));
+        if (IS_ERR(iris_device)) {
+                printk(KERN_ERR "Failed to register iris platform device\n");
+                platform_driver_unregister(&iris_driver);
+                return PTR_ERR(iris_device);
+        }
+        return 0;
+}
+
+static void iris_exit(void)
+{
+        platform_device_unregister(iris_device);
+        platform_driver_unregister(&iris_driver);
 }
 
 module_init(iris_init);