Merge branch 'for-3.5' of ../cgroup into block/for-3.5/core-merged

cgroup/for-3.5 contains the following changes which blk-cgroup needs
to proceed with the on-going cleanup.

* Dynamic addition and removal of cftypes to make config/stat file
  handling modular for policies.

* cgroup removal update to not wait for css references to drain to fix
  blkcg removal hang caused by cfq caching cfqgs.

Pull in cgroup/for-3.5 into block/for-3.5/core.  This causes the
following conflicts in block/blk-cgroup.c.

* 761b3ef50e "cgroup: remove cgroup_subsys argument from callbacks"
  conflicts with blkiocg_pre_destroy() addition and blkiocg_attach()
  removal.  Resolved by removing @subsys from all subsys methods.

* 676f7c8f84 "cgroup: relocate cftype and cgroup_subsys definitions in
  controllers" conflicts with ->pre_destroy() and ->attach() updates
  and removal of modular config.  Resolved by dropping forward
  declarations of the methods and applying updates to the relocated
  blkio_subsys.

* 4baf6e3325 "cgroup: convert all non-memcg controllers to the new
  cftype interface" builds upon the previous item.  Resolved by adding
  ->base_cftypes to the relocated blkio_subsys.

Signed-off-by: Tejun Heo <tj@kernel.org>

6 files changed, 72 insertions, 33 deletions

diff --git a/init/Kconfig b/init/Kconfig
index da9222d5ae97..2acd917ebf2d 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -438,15 +438,6 @@ config PREEMPT_RCU
           This option enables preemptible-RCU code that is common between
           the TREE_PREEMPT_RCU and TINY_PREEMPT_RCU implementations.
 
-config RCU_TRACE
-        bool "Enable tracing for RCU"
-        help
-          This option provides tracing in RCU which presents stats
-          in debugfs for debugging RCU implementation.
-
-          Say Y here if you want to enable RCU tracing
-          Say N if you are unsure.
-
 config RCU_FANOUT
         int "Tree-based hierarchical RCU fanout value"
         range 2 64 if 64BIT
diff --git a/init/calibrate.c b/init/calibrate.c
index 5f117ca9e069..fda0a7b0f06c 100644
--- a/init/calibrate.c
+++ b/init/calibrate.c
@@ -267,7 +267,8 @@ void __cpuinit calibrate_delay(void)
 
         if (per_cpu(cpu_loops_per_jiffy, this_cpu)) {
                 lpj = per_cpu(cpu_loops_per_jiffy, this_cpu);
-                pr_info("Calibrating delay loop (skipped) "
+                if (!printed)
+                        pr_info("Calibrating delay loop (skipped) "
                                 "already calibrated this CPU");
         } else if (preset_lpj) {
                 lpj = preset_lpj;
diff --git a/init/do_mounts.c b/init/do_mounts.c
index 2974c8b3b351..0e93f92a0345 100644
--- a/init/do_mounts.c
+++ b/init/do_mounts.c
@@ -373,8 +373,8 @@ retry:
 #ifdef CONFIG_BLOCK
                 __bdevname(ROOT_DEV, b);
 #endif
-                printk("VFS: Cannot open root device \"%s\" or %s\n",
-                                root_device_name, b);
+                printk("VFS: Cannot open root device \"%s\" or %s: error %d\n",
+                                root_device_name, b, err);
                 printk("Please append a correct \"root=\" boot option; here are the available partitions:\n");
 
                 printk_all_partitions();
diff --git a/init/do_mounts_initrd.c b/init/do_mounts_initrd.c
index 3098a38f3ae1..9047330c73e9 100644
--- a/init/do_mounts_initrd.c
+++ b/init/do_mounts_initrd.c
@@ -2,7 +2,6 @@
 #include <linux/kernel.h>
 #include <linux/fs.h>
 #include <linux/minix_fs.h>
-#include <linux/ext2_fs.h>
 #include <linux/romfs_fs.h>
 #include <linux/initrd.h>
 #include <linux/sched.h>
diff --git a/init/do_mounts_rd.c b/init/do_mounts_rd.c
index 887629e24c54..6212586df29a 100644
--- a/init/do_mounts_rd.c
+++ b/init/do_mounts_rd.c
@@ -54,20 +54,19 @@ identify_ramdisk_image(int fd, int start_block, decompress_fn *decompressor)
 {
         const int size = 512;
         struct minix_super_block *minixsb;
-        struct ext2_super_block *ext2sb;
         struct romfs_super_block *romfsb;
         struct cramfs_super *cramfsb;
         struct squashfs_super_block *squashfsb;
         int nblocks = -1;
         unsigned char *buf;
         const char *compress_name;
+        unsigned long n;
 
         buf = kmalloc(size, GFP_KERNEL);
         if (!buf)
                 return -ENOMEM;
 
         minixsb = (struct minix_super_block *) buf;
-        ext2sb = (struct ext2_super_block *) buf;
         romfsb = (struct romfs_super_block *) buf;
         cramfsb = (struct cramfs_super *) buf;
         squashfsb = (struct squashfs_super_block *) buf;
@@ -150,12 +149,12 @@ identify_ramdisk_image(int fd, int start_block, decompress_fn *decompressor)
         }
 
         /* Try ext2 */
-        if (ext2sb->s_magic == cpu_to_le16(EXT2_SUPER_MAGIC)) {
+        n = ext2_image_size(buf);
+        if (n) {
                 printk(KERN_NOTICE
                        "RAMDISK: ext2 filesystem found at block %d\n",
                        start_block);
-                nblocks = le32_to_cpu(ext2sb->s_blocks_count) <<
-                        le32_to_cpu(ext2sb->s_log_block_size);
+                nblocks = n;
                 goto done;
         }
 
@@ -178,7 +177,7 @@ int __init rd_load_image(char *from)
         char *buf = NULL;
         unsigned short rotate = 0;
         decompress_fn decompressor = NULL;
-#if !defined(CONFIG_S390) && !defined(CONFIG_PPC_ISERIES)
+#if !defined(CONFIG_S390)
         char rotator[4] = { '|' , '/' , '-' , '\\' };
 #endif
 
@@ -264,7 +263,7 @@ int __init rd_load_image(char *from)
                 }
                 sys_read(in_fd, buf, BLOCK_SIZE);
                 sys_write(out_fd, buf, BLOCK_SIZE);
-#if !defined(CONFIG_S390) && !defined(CONFIG_PPC_ISERIES)
+#if !defined(CONFIG_S390)
                 if (!(i % 16)) {
                         printk("%c\b", rotator[rotate & 0x3]);
                         rotate++;
diff --git a/init/main.c b/init/main.c
index ff49a6dacfbb..9d454f09f3b1 100644
--- a/init/main.c
+++ b/init/main.c
@@ -87,7 +87,6 @@ extern void mca_init(void);
 extern void sbus_init(void);
 extern void prio_tree_init(void);
 extern void radix_tree_init(void);
-extern void free_initmem(void);
 #ifndef CONFIG_DEBUG_RODATA
 static inline void mark_rodata_ro(void) { }
 #endif
@@ -374,11 +373,8 @@ static noinline void __init_refok rest_init(void)
          * at least once to get things moving:
          */
         init_idle_bootup_task(current);
-        preempt_enable_no_resched();
-        schedule();
-
+        schedule_preempt_disabled();
         /* Call into cpu_idle with preempt disabled */
-        preempt_disable();
         cpu_idle();
 }
 
@@ -403,7 +399,7 @@ static int __init do_early_param(char *param, char *val)
 
 void __init parse_early_options(char *cmdline)
 {
-        parse_args("early options", cmdline, NULL, 0, do_early_param);
+        parse_args("early options", cmdline, NULL, 0, 0, 0, do_early_param);
 }
 
 /* Arch code calls this early on, or if not, just before other parsing. */
@@ -449,8 +445,8 @@ void __init __weak thread_info_cache_init(void)
 static void __init mm_init(void)
 {
         /*
-         * page_cgroup requires countinous pages as memmap
-         * and it's bigger than MAX_ORDER unless SPARSEMEM.
+         * page_cgroup requires contiguous pages,
+         * bigger than MAX_ORDER unless SPARSEMEM.
          */
         page_cgroup_init_flatmem();
         mem_init();
@@ -506,7 +502,7 @@ asmlinkage void __init start_kernel(void)
         parse_early_param();
         parse_args("Booting kernel", static_command_line, __start___param,
                    __stop___param - __start___param,
-                   &unknown_bootoption);
+                   0, 0, &unknown_bootoption);
 
         jump_label_init();
 
@@ -702,16 +698,69 @@ int __init_or_module do_one_initcall(initcall_t fn)
 }
 
 
-extern initcall_t __initcall_start[], __initcall_end[], __early_initcall_end[];
+extern initcall_t __initcall_start[];
+extern initcall_t __initcall0_start[];
+extern initcall_t __initcall1_start[];
+extern initcall_t __initcall2_start[];
+extern initcall_t __initcall3_start[];
+extern initcall_t __initcall4_start[];
+extern initcall_t __initcall5_start[];
+extern initcall_t __initcall6_start[];
+extern initcall_t __initcall7_start[];
+extern initcall_t __initcall_end[];
+
+static initcall_t *initcall_levels[] __initdata = {
+        __initcall0_start,
+        __initcall1_start,
+        __initcall2_start,
+        __initcall3_start,
+        __initcall4_start,
+        __initcall5_start,
+        __initcall6_start,
+        __initcall7_start,
+        __initcall_end,
+};
+
+static char *initcall_level_names[] __initdata = {
+        "early parameters",
+        "core parameters",
+        "postcore parameters",
+        "arch parameters",
+        "subsys parameters",
+        "fs parameters",
+        "device parameters",
+        "late parameters",
+};
+
+static int __init ignore_unknown_bootoption(char *param, char *val)
+{
+        return 0;
+}
 
-static void __init do_initcalls(void)
+static void __init do_initcall_level(int level)
 {
+        extern const struct kernel_param __start___param[], __stop___param[];
         initcall_t *fn;
 
-        for (fn = __early_initcall_end; fn < __initcall_end; fn++)
+        strcpy(static_command_line, saved_command_line);
+        parse_args(initcall_level_names[level],
+                   static_command_line, __start___param,
+                   __stop___param - __start___param,
+                   level, level,
+                   ignore_unknown_bootoption);
+
+        for (fn = initcall_levels[level]; fn < initcall_levels[level+1]; fn++)
                 do_one_initcall(*fn);
 }
 
+static void __init do_initcalls(void)
+{
+        int level;
+
+        for (level = 0; level < ARRAY_SIZE(initcall_levels) - 1; level++)
+                do_initcall_level(level);
+}
+
 /*
  * Ok, the machine is now initialized. None of the devices
  * have been touched yet, but the CPU subsystem is up and
@@ -735,7 +784,7 @@ static void __init do_pre_smp_initcalls(void)
 {
         initcall_t *fn;
 
-        for (fn = __initcall_start; fn < __early_initcall_end; fn++)
+        for (fn = __initcall_start; fn < __initcall0_start; fn++)
                 do_one_initcall(*fn);
 }