Merge branch 'akpm' (aka "Andrew's patch-bomb, take two")

Andrew explains:

 - various misc stuff

 - Most of the rest of MM: memcg, threaded hugepages, others.

 - cpumask

 - kexec

 - kdump

 - some direct-io performance tweaking

 - radix-tree optimisations

 - new selftests code

   A note on this: often people will develop a new userspace-visible
   feature and will develop userspace code to exercise/test that
   feature.  Then they merge the patch and the selftest code dies.
   Sometimes we paste it into the changelog.  Sometimes the code gets
   thrown into Documentation/(!).

   This saddens me.  So this patch creates a bare-bones framework which
   will henceforth allow me to ask people to include their test apps in
   the kernel tree so we can keep them alive.  Then when people enhance
   or fix the feature, I can ask them to update the test app too.

   The infrastruture is terribly trivial at present - let's see how it
   evolves.

 - checkpoint/restart feature work.

   A note on this: this is a project by various mad Russians to perform
   c/r mainly from userspace, with various oddball helper code added
   into the kernel where the need is demonstrated.

   So rather than some large central lump of code, what we have is
   little bits and pieces popping up in various places which either
   expose something new or which permit something which is normally
   kernel-private to be modified.

   The overall project is an ongoing thing.  I've judged that the size
   and scope of the thing means that we're more likely to be successful
   with it if we integrate the support into mainline piecemeal rather
   than allowing it all to develop out-of-tree.

   However I'm less confident than the developers that it will all
   eventually work! So what I'm asking them to do is to wrap each piece
   of new code inside CONFIG_CHECKPOINT_RESTORE.  So if it all
   eventually comes to tears and the project as a whole fails, it should
   be a simple matter to go through and delete all trace of it.

This lot pretty much wraps up the -rc1 merge for me.

* akpm: (96 commits)
  unlzo: fix input buffer free
  ramoops: update parameters only after successful init
  ramoops: fix use of rounddown_pow_of_two()
  c/r: prctl: add PR_SET_MM codes to set up mm_struct entries
  c/r: procfs: add start_data, end_data, start_brk members to /proc/$pid/stat v4
  c/r: introduce CHECKPOINT_RESTORE symbol
  selftests: new x86 breakpoints selftest
  selftests: new very basic kernel selftests directory
  radix_tree: take radix_tree_path off stack
  radix_tree: remove radix_tree_indirect_to_ptr()
  dio: optimize cache misses in the submission path
  vfs: cache request_queue in struct block_device
  fs/direct-io.c: calculate fs_count correctly in get_more_blocks()
  drivers/parport/parport_pc.c: fix warnings
  panic: don't print redundant backtraces on oops
  sysctl: add the kernel.ns_last_pid control
  kdump: add udev events for memory online/offline
  include/linux/crash_dump.h needs elf.h
  kdump: fix crash_kexec()/smp_send_stop() race in panic()
  kdump: crashk_res init check for /sys/kernel/kexec_crash_size
  ...

5 files changed, 32 insertions, 22 deletions

diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index f17e3ea041c0..ed5de58c340f 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -295,11 +295,22 @@ static int memory_block_change_state(struct memory_block *mem,
 
         ret = memory_block_action(mem->start_section_nr, to_state);
 
-        if (ret)
+        if (ret) {
                 mem->state = from_state_req;
-        else
-                mem->state = to_state;
+                goto out;
+        }
 
+        mem->state = to_state;
+        switch (mem->state) {
+        case MEM_OFFLINE:
+                kobject_uevent(&mem->dev.kobj, KOBJ_OFFLINE);
+                break;
+        case MEM_ONLINE:
+                kobject_uevent(&mem->dev.kobj, KOBJ_ONLINE);
+                break;
+        default:
+                break;
+        }
 out:
         mutex_unlock(&mem->state_mutex);
         return ret;
diff --git a/drivers/char/ramoops.c b/drivers/char/ramoops.c
index 7c7f42a1f880..9fec3232b736 100644
--- a/drivers/char/ramoops.c
+++ b/drivers/char/ramoops.c
@@ -83,8 +83,7 @@ static void ramoops_do_dump(struct kmsg_dumper *dumper,
         struct timeval timestamp;
 
         if (reason != KMSG_DUMP_OOPS &&
-            reason != KMSG_DUMP_PANIC &&
-            reason != KMSG_DUMP_KEXEC)
+            reason != KMSG_DUMP_PANIC)
                 return;
 
         /* Only dump oopses if dump_oops is set */
@@ -126,8 +125,8 @@ static int __init ramoops_probe(struct platform_device *pdev)
                 goto fail3;
         }
 
-        rounddown_pow_of_two(pdata->mem_size);
-        rounddown_pow_of_two(pdata->record_size);
+        pdata->mem_size = rounddown_pow_of_two(pdata->mem_size);
+        pdata->record_size = rounddown_pow_of_two(pdata->record_size);
 
         /* Check for the minimum memory size */
         if (pdata->mem_size < MIN_MEM_SIZE &&
@@ -148,14 +147,6 @@ static int __init ramoops_probe(struct platform_device *pdev)
         cxt->phys_addr = pdata->mem_address;
         cxt->record_size = pdata->record_size;
         cxt->dump_oops = pdata->dump_oops;
-        /*
-         * Update the module parameter variables as well so they are visible
-         * through /sys/module/ramoops/parameters/
-         */
-        mem_size = pdata->mem_size;
-        mem_address = pdata->mem_address;
-        record_size = pdata->record_size;
-        dump_oops = pdata->dump_oops;
 
         if (!request_mem_region(cxt->phys_addr, cxt->size, "ramoops")) {
                 pr_err("request mem region failed\n");
@@ -176,6 +167,15 @@ static int __init ramoops_probe(struct platform_device *pdev)
                 goto fail1;
         }
 
+        /*
+         * Update the module parameter variables as well so they are visible
+         * through /sys/module/ramoops/parameters/
+         */
+        mem_size = pdata->mem_size;
+        mem_address = pdata->mem_address;
+        record_size = pdata->record_size;
+        dump_oops = pdata->dump_oops;
+
         return 0;
 
 fail1:
diff --git a/drivers/mtd/mtdoops.c b/drivers/mtd/mtdoops.c
index db8e8272d69b..3ce99e00a49e 100644
--- a/drivers/mtd/mtdoops.c
+++ b/drivers/mtd/mtdoops.c
@@ -315,8 +315,7 @@ static void mtdoops_do_dump(struct kmsg_dumper *dumper,
         char *dst;
 
         if (reason != KMSG_DUMP_OOPS &&
-            reason != KMSG_DUMP_PANIC &&
-            reason != KMSG_DUMP_KEXEC)
+            reason != KMSG_DUMP_PANIC)
                 return;
 
         /* Only dump oopses if dump_oops is set */
diff --git a/drivers/parport/parport_pc.c b/drivers/parport/parport_pc.c
index d0b597b50398..0cb64f50cecd 100644
--- a/drivers/parport/parport_pc.c
+++ b/drivers/parport/parport_pc.c
@@ -3404,8 +3404,8 @@ static int __init parport_init_mode_setup(char *str)
 #endif
 
 #ifdef MODULE
-static const char *irq[PARPORT_PC_MAX_PORTS];
-static const char *dma[PARPORT_PC_MAX_PORTS];
+static char *irq[PARPORT_PC_MAX_PORTS];
+static char *dma[PARPORT_PC_MAX_PORTS];
 
 MODULE_PARM_DESC(io, "Base I/O address (SPP regs)");
 module_param_array(io, int, NULL, 0);
diff --git a/drivers/video/nvidia/nvidia.c b/drivers/video/nvidia/nvidia.c
index 081dc4745274..fe13ac567d54 100644
--- a/drivers/video/nvidia/nvidia.c
+++ b/drivers/video/nvidia/nvidia.c
@@ -81,7 +81,7 @@ static int vram __devinitdata = 0;
 static int bpp __devinitdata = 8;
 static int reverse_i2c __devinitdata;
 #ifdef CONFIG_MTRR
-static int nomtrr __devinitdata = 0;
+static bool nomtrr __devinitdata = false;
 #endif
 #ifdef CONFIG_PMAC_BACKLIGHT
 static int backlight __devinitdata = 1;
@@ -1509,7 +1509,7 @@ static int __devinit nvidiafb_setup(char *options)
                         backlight = simple_strtoul(this_opt+10, NULL, 0);
 #ifdef CONFIG_MTRR
                 } else if (!strncmp(this_opt, "nomtrr", 6)) {
-                        nomtrr = 1;
+                        nomtrr = true;
 #endif
                 } else if (!strncmp(this_opt, "fpdither:", 9)) {
                         fpdither = simple_strtol(this_opt+9, NULL, 0);
@@ -1599,7 +1599,7 @@ MODULE_PARM_DESC(bpp, "pixel width in bits"
 module_param(reverse_i2c, int, 0);
 MODULE_PARM_DESC(reverse_i2c, "reverse port assignment of the i2c bus");
 #ifdef CONFIG_MTRR
-module_param(nomtrr, bool, 0);
+module_param(nomtrr, bool, false);
 MODULE_PARM_DESC(nomtrr, "Disables MTRR support (0 or 1=disabled) "
                  "(default=0)");
 #endif