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um: Get rid of thread_struct->saved_task 

As we have a sane show_stack() now, we can drop
the ->saved_task hack.

Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Richard Weinberger 2013-09-23 17:38:03 +02:00
parent f72c22e45e
commit a1850e9c72
3 changed files with 4 additions and 18 deletions
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6
arch/um/drivers/mconsole_kern.c
View File

@ -645,11 +645,9 @@ void mconsole_sysrq(struct mc_request *req)
static void stack_proc(void *arg)
{
struct task_struct *from = current, *to = arg;
struct task_struct *task = arg;
to->thread.saved_task = from;
rcu_user_hooks_switch(from, to);
switch_to(from, to, from);
show_stack(task, NULL);
}
/*

1
arch/um/include/asm/processor-generic.h
View File

@ -19,7 +19,6 @@ struct task_struct;
struct mm_struct;
struct thread_struct {
struct task_struct *saved_task;
struct pt_regs regs;
struct pt_regs *segv_regs;
int singlestep_syscall;

15
arch/um/kernel/process.c
View File

@ -82,19 +82,8 @@ void *__switch_to(struct task_struct *from, struct task_struct *to)
to->thread.prev_sched = from;
set_current(to);
do {
current->thread.saved_task = NULL;
switch_threads(&from->thread.switch_buf,
&to->thread.switch_buf);
arch_switch_to(current);
if (current->thread.saved_task)
show_regs(&(current->thread.regs));
to = current->thread.saved_task;
from = current;
} while (current->thread.saved_task);
switch_threads(&from->thread.switch_buf, &to->thread.switch_buf);
arch_switch_to(current);
return current->thread.prev_sched;
}