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init: Remove the BKL from startup code 

I have shown by code review that no driver takes
the BKL at init time any more, so whatever the
init code was locking against is no longer there
and it is now safe to remove the BKL there.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Steven Rostedt <rostedt@goodmis>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
This commit is contained in:
Arnd Bergmann 2010-07-04 00:02:26 +02:00 committed by Frederic Weisbecker
parent 815c4163b6
commit 5e3d20a68f
2 changed files with 0 additions and 13 deletions
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5
init/main.c
View File

@ -444,7 +444,6 @@ 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()
@ -565,7 +564,6 @@ 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();
@ -829,7 +827,6 @@ 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 +866,6 @@ 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
*/

8
kernel/trace/trace.c
View File

@ -734,13 +734,6 @@ __acquires(kernel_lock)
return -1;
}
/*
* When this gets called we hold the BKL which means that
* preemption is disabled. Various trace selftests however
* need to disable and enable preemption for successful tests.
* So we drop the BKL here and grab it after the tests again.
*/
unlock_kernel();
mutex_lock(&trace_types_lock);
tracing_selftest_running = true;
@ -822,7 +815,6 @@ __acquires(kernel_lock)
#endif
out_unlock:
lock_kernel();
return ret;
}