aboutsummaryrefslogtreecommitdiff
path: root/arch/um
diff options
context:
space:
mode:
authorRichard Weinberger <richard@nod.at>2013-09-23 17:38:03 +0200
committerRichard Weinberger <richard@nod.at>2013-11-17 11:27:35 +0100
commita1850e9c7282db1c19a18093a945d5e84bfe7418 (patch)
tree8d9d3eafc0f045e2ff6c4da8108fb731ecfcda94 /arch/um
parentf72c22e45e8f8fe78c7f793d983bee5bed63497e (diff)
downloadlinux-linaro-stable-a1850e9c7282db1c19a18093a945d5e84bfe7418.tar.gz
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>
Diffstat (limited to 'arch/um')
-rw-r--r--arch/um/drivers/mconsole_kern.c6
-rw-r--r--arch/um/include/asm/processor-generic.h1
-rw-r--r--arch/um/kernel/process.c15
3 files changed, 4 insertions, 18 deletions
diff --git a/arch/um/drivers/mconsole_kern.c b/arch/um/drivers/mconsole_kern.c
index 3df3bd544492..29880c9b324e 100644
--- a/arch/um/drivers/mconsole_kern.c
+++ b/arch/um/drivers/mconsole_kern.c
@@ -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);
}
/*
diff --git a/arch/um/include/asm/processor-generic.h b/arch/um/include/asm/processor-generic.h
index 90469031297b..d89b02bb6262 100644
--- a/arch/um/include/asm/processor-generic.h
+++ b/arch/um/include/asm/processor-generic.h
@@ -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;
diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c
index bbcef522bcb1..eecc4142764c 100644
--- a/arch/um/kernel/process.c
+++ b/arch/um/kernel/process.c
@@ -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;
}