2 files changed, 26 insertions, 59 deletions

diff --git a/init/Kconfig b/init/Kconfig
index 05e932ef5169..24932b9c03e8 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1147,30 +1147,6 @@ config TRACEPOINTS
 
 source "arch/Kconfig"
 
-config SLOW_WORK
-        default n
-        bool
-        help
-          The slow work thread pool provides a number of dynamically allocated
-          threads that can be used by the kernel to perform operations that
-          take a relatively long time.
-
-          An example of this would be CacheFiles doing a path lookup followed
-          by a series of mkdirs and a create call, all of which have to touch
-          disk.
-
-          See Documentation/slow-work.txt.
-
-config SLOW_WORK_DEBUG
-        bool "Slow work debugging through debugfs"
-        default n
-        depends on SLOW_WORK && DEBUG_FS
-        help
-          Display the contents of the slow work run queue through debugfs,
-          including items currently executing.
-
-          See Documentation/slow-work.txt.
-
 endmenu         # General setup
 
 config HAVE_GENERIC_DMA_COHERENT
diff --git a/init/main.c b/init/main.c
index a42fdf4aeba9..86cbfd085b01 100644
--- a/init/main.c
+++ b/init/main.c
@@ -32,7 +32,6 @@
 #include <linux/start_kernel.h>
 #include <linux/security.h>
 #include <linux/smp.h>
-#include <linux/workqueue.h>
 #include <linux/profile.h>
 #include <linux/rcupdate.h>
 #include <linux/moduleparam.h>
@@ -66,11 +65,9 @@
 #include <linux/ftrace.h>
 #include <linux/async.h>
 #include <linux/kmemcheck.h>
-#include <linux/kmemtrace.h>
 #include <linux/sfi.h>
 #include <linux/shmem_fs.h>
 #include <linux/slab.h>
-#include <trace/boot.h>
 
 #include <asm/io.h>
 #include <asm/bugs.h>
@@ -444,7 +441,6 @@ static noinline void __init_refok rest_init(void)
         kthreadd_task = find_task_by_pid_ns(pid, &init_pid_ns);
         rcu_read_unlock();
         complete(&kthreadd_done);
-        unlock_kernel();
 
         /*
          * The boot idle thread must execute schedule()
@@ -532,6 +528,7 @@ static void __init mm_init(void)
         page_cgroup_init_flatmem();
         mem_init();
         kmem_cache_init();
+        percpu_init_late();
         pgtable_cache_init();
         vmalloc_init();
 }
@@ -565,7 +562,6 @@ asmlinkage void __init start_kernel(void)
  * Interrupts are still disabled. Do necessary setups, then
  * enable them
  */
-        lock_kernel();
         tick_init();
         boot_cpu_init();
         page_address_init();
@@ -663,7 +659,6 @@ asmlinkage void __init start_kernel(void)
 #endif
         page_cgroup_init();
         enable_debug_pagealloc();
-        kmemtrace_init();
         kmemleak_init();
         debug_objects_mem_init();
         idr_init_cache();
@@ -725,38 +720,39 @@ int initcall_debug;
 core_param(initcall_debug, initcall_debug, bool, 0644);
 
 static char msgbuf[64];
-static struct boot_trace_call call;
-static struct boot_trace_ret ret;
 
-int do_one_initcall(initcall_t fn)
+static int __init_or_module do_one_initcall_debug(initcall_t fn)
 {
-        int count = preempt_count();
         ktime_t calltime, delta, rettime;
+        unsigned long long duration;
+        int ret;
 
-        if (initcall_debug) {
-                call.caller = task_pid_nr(current);
-                printk("calling  %pF @ %i\n", fn, call.caller);
-                calltime = ktime_get();
-                trace_boot_call(&call, fn);
-                enable_boot_trace();
-        }
+        printk(KERN_DEBUG "calling  %pF @ %i\n", fn, task_pid_nr(current));
+        calltime = ktime_get();
+        ret = fn();
+        rettime = ktime_get();
+        delta = ktime_sub(rettime, calltime);
+        duration = (unsigned long long) ktime_to_ns(delta) >> 10;
+        printk(KERN_DEBUG "initcall %pF returned %d after %lld usecs\n", fn,
+                ret, duration);
 
-        ret.result = fn();
+        return ret;
+}
 
-        if (initcall_debug) {
-                disable_boot_trace();
-                rettime = ktime_get();
-                delta = ktime_sub(rettime, calltime);
-                ret.duration = (unsigned long long) ktime_to_ns(delta) >> 10;
-                trace_boot_ret(&ret, fn);
-                printk("initcall %pF returned %d after %Ld usecs\n", fn,
-                        ret.result, ret.duration);
-        }
+int __init_or_module do_one_initcall(initcall_t fn)
+{
+        int count = preempt_count();
+        int ret;
+
+        if (initcall_debug)
+                ret = do_one_initcall_debug(fn);
+        else
+                ret = fn();
 
         msgbuf[0] = 0;
 
-        if (ret.result && ret.result != -ENODEV && initcall_debug)
-                sprintf(msgbuf, "error code %d ", ret.result);
+        if (ret && ret != -ENODEV && initcall_debug)
+                sprintf(msgbuf, "error code %d ", ret);
 
         if (preempt_count() != count) {
                 strlcat(msgbuf, "preemption imbalance ", sizeof(msgbuf));
@@ -770,7 +766,7 @@ int do_one_initcall(initcall_t fn)
                 printk("initcall %pF returned with %s\n", fn, msgbuf);
         }
 
-        return ret.result;
+        return ret;
 }
 
 
@@ -796,7 +792,6 @@ static void __init do_initcalls(void)
  */
 static void __init do_basic_setup(void)
 {
-        init_workqueues();
         cpuset_init_smp();
         usermodehelper_init();
         init_tmpfs();
@@ -829,7 +824,6 @@ static noinline int init_post(void)
         /* need to finish all async __init code before freeing the memory */
         async_synchronize_full();
         free_initmem();
-        unlock_kernel();
         mark_rodata_ro();
         system_state = SYSTEM_RUNNING;
         numa_default_policy();
@@ -869,8 +863,6 @@ static int __init kernel_init(void * unused)
          * Wait until kthreadd is all set-up.
          */
         wait_for_completion(&kthreadd_done);
-        lock_kernel();
-
         /*
          * init can allocate pages on any node
          */
@@ -894,7 +886,6 @@ static int __init kernel_init(void * unused)
         smp_prepare_cpus(setup_max_cpus);
 
         do_pre_smp_initcalls();
-        start_boot_trace();
 
         smp_init();
         sched_init_smp();