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um: switch to generic kernel_thread() 

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2012-09-21 20:32:29 -04:00
parent 6783eaa2e1
commit 1f02ab4a23
3 changed files with 4 additions and 16 deletions
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2
arch/um/include/asm/processor-generic.h
View File

@ -63,8 +63,6 @@ static inline void release_thread(struct task_struct *task)
{ {
} }
extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
extern unsigned long thread_saved_pc(struct task_struct *t); extern unsigned long thread_saved_pc(struct task_struct *t);
static inline void mm_copy_segments(struct mm_struct *from_mm, static inline void mm_copy_segments(struct mm_struct *from_mm,

17
arch/um/kernel/process.c
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@ -69,18 +69,6 @@ unsigned long alloc_stack(int order, int atomic)
return page; return page;
} }
int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
{
int pid;
current->thread.request.u.thread.proc = fn;
current->thread.request.u.thread.arg = arg;
pid = do_fork(CLONE_VM | CLONE_UNTRACED | flags, 0,
&current->thread.regs, 0, NULL, NULL);
return pid;
}
EXPORT_SYMBOL(kernel_thread);
static inline void set_current(struct task_struct *task) static inline void set_current(struct task_struct *task)
{ {
cpu_tasks[task_thread_info(task)->cpu] = ((struct cpu_task) cpu_tasks[task_thread_info(task)->cpu] = ((struct cpu_task)
@ -177,7 +165,7 @@ void fork_handler(void)
} }
int copy_thread(unsigned long clone_flags, unsigned long sp, int copy_thread(unsigned long clone_flags, unsigned long sp,
unsigned long stack_top, struct task_struct * p, unsigned long arg, struct task_struct * p,
struct pt_regs *regs) struct pt_regs *regs)
{ {
void (*handler)(void); void (*handler)(void);
@ -198,7 +186,8 @@ int copy_thread(unsigned long clone_flags, unsigned long sp,
arch_copy_thread(&current->thread.arch, &p->thread.arch); arch_copy_thread(&current->thread.arch, &p->thread.arch);
} else { } else {
get_safe_registers(p->thread.regs.regs.gp, p->thread.regs.regs.fp); get_safe_registers(p->thread.regs.regs.gp, p->thread.regs.regs.fp);
p->thread.request.u.thread = current->thread.request.u.thread; p->thread.request.u.thread.proc = (int (*)(void *))sp;
p->thread.request.u.thread.arg = (void *)arg;
handler = new_thread_handler; handler = new_thread_handler;
} }

1
arch/x86/um/Kconfig
View File

@ -13,6 +13,7 @@ endmenu
config UML_X86 config UML_X86
def_bool y def_bool y
select GENERIC_FIND_FIRST_BIT select GENERIC_FIND_FIRST_BIT
select GENERIC_KERNEL_THREAD
config 64BIT config 64BIT
bool "64-bit kernel" if SUBARCH = "x86" bool "64-bit kernel" if SUBARCH = "x86"