0dafcbe128
UML enables TRACE_IRQFLAGS_SUPPORT but doesn't actually implement
it. It seems to have been added for lockdep support, but that can't
actually really work well without IRQ flags tracing, as is also
very noisily reported when enabling CONFIG_DEBUG_LOCKDEP.
Implement it now.
Fixes: 711553efa5 ("[PATCH] uml: declare in Kconfig our partial LOCKDEP support")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
56 lines
1.0 KiB
C
56 lines
1.0 KiB
C
/*
|
|
* Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
|
|
* Licensed under the GPL
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/sched/mm.h>
|
|
#include <linux/sched/task_stack.h>
|
|
#include <linux/sched/task.h>
|
|
|
|
#include <as-layout.h>
|
|
#include <kern.h>
|
|
#include <os.h>
|
|
#include <skas.h>
|
|
|
|
extern void start_kernel(void);
|
|
|
|
static int __init start_kernel_proc(void *unused)
|
|
{
|
|
int pid;
|
|
|
|
block_signals_trace();
|
|
pid = os_getpid();
|
|
|
|
cpu_tasks[0].pid = pid;
|
|
cpu_tasks[0].task = current;
|
|
|
|
start_kernel();
|
|
return 0;
|
|
}
|
|
|
|
extern int userspace_pid[];
|
|
|
|
extern char cpu0_irqstack[];
|
|
|
|
int __init start_uml(void)
|
|
{
|
|
stack_protections((unsigned long) &cpu0_irqstack);
|
|
set_sigstack(cpu0_irqstack, THREAD_SIZE);
|
|
|
|
init_new_thread_signals();
|
|
|
|
init_task.thread.request.u.thread.proc = start_kernel_proc;
|
|
init_task.thread.request.u.thread.arg = NULL;
|
|
return start_idle_thread(task_stack_page(&init_task),
|
|
&init_task.thread.switch_buf);
|
|
}
|
|
|
|
unsigned long current_stub_stack(void)
|
|
{
|
|
if (current->mm == NULL)
|
|
return 0;
|
|
|
|
return current->mm->context.id.stack;
|
|
}
|