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c6x: switch to generic kernel_thread()

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2012-09-22 18:23:49 -04:00
parent 680a14535c
commit 5687580bcb
3 changed files with 6 additions and 21 deletions
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1
arch/c6x/Kconfig
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@ -17,6 +17,7 @@ config C6X
select OF
select OF_EARLY_FLATTREE
select GENERIC_CLOCKEVENTS
select GENERIC_KERNEL_THREAD
config MMU
def_bool n

2
arch/c6x/include/asm/processor.h
View File

@ -92,8 +92,6 @@ static inline void release_thread(struct task_struct *dead_task)
{
}
extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
#define copy_segments(tsk, mm) do { } while (0)
#define release_segments(mm) do { } while (0)

24
arch/c6x/kernel/process.c
View File

@ -104,22 +104,6 @@ void machine_power_off(void)
halt_loop();
}
/*
* Create a kernel thread
*/
int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
{
struct pt_regs regs = {
.a0 = (unsigned long)fn,
.a1 = (unsigned long)arg,
.tsr = 0, /* kernel mode */
};
/* Ok, create the new process.. */
return do_fork(flags | CLONE_VM | CLONE_UNTRACED, -1, &regs,
0, NULL, NULL);
}
void flush_thread(void)
{
}
@ -177,14 +161,16 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
childregs = task_pt_regs(p);
*childregs = *regs;
if (usp == -1) {
if (!regs) {
/* case of __kernel_thread: we return to supervisor space */
memset(childregs, 0, sizeof(struct pt_regs));
childregs->sp = (unsigned long)(childregs + 1);
p->thread.pc = (unsigned long) ret_from_kernel_thread;
childregs->a0 = usp; /* function */
childregs->a1 = ustk_size; /* argument */
} else {
/* Otherwise use the given stack */
*childregs = *regs;
childregs->sp = usp;
p->thread.pc = (unsigned long) ret_from_fork;
}