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| author | Brian Gerst <brgerst@gmail.com> | 2009-12-09 20:34:40 +0300 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2009-12-11 02:55:26 +0300 |
| commit | 3bd95dfb182969dc6d2a317c150e0df7107608d3 (patch) | |
| tree | 8624969693d1bb51f06f85c35b7ac84ef41b9aeb /arch/x86/kernel/process_64.c | |
| parent | fc380ceed7fe469728ea4acdbda4495ea943ee1c (diff) | |
| download | linux-3bd95dfb182969dc6d2a317c150e0df7107608d3.tar.xz | |
x86, 64-bit: Move kernel_thread to C
Prepare for merging with 32-bit.
Signed-off-by: Brian Gerst <brgerst@gmail.com>
LKML-Reference: <1260380084-3707-2-git-send-email-brgerst@gmail.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'arch/x86/kernel/process_64.c')
| -rw-r--r-- | arch/x86/kernel/process_64.c | 31 |
1 files changed, 29 insertions, 2 deletions
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c index 83019f94b83d..92484c2130c6 100644 --- a/arch/x86/kernel/process_64.c +++ b/arch/x86/kernel/process_64.c @@ -59,8 +59,6 @@ asmlinkage extern void ret_from_fork(void); DEFINE_PER_CPU(unsigned long, old_rsp); static DEFINE_PER_CPU(unsigned char, is_idle); -unsigned long kernel_thread_flags = CLONE_VM | CLONE_UNTRACED; - static ATOMIC_NOTIFIER_HEAD(idle_notifier); void idle_notifier_register(struct notifier_block *n) @@ -231,6 +229,35 @@ void show_regs(struct pt_regs *regs) show_trace(NULL, regs, (void *)(regs + 1), regs->bp); } +/* + * This gets run with %si containing the + * function to call, and %di containing + * the "args". + */ +extern void kernel_thread_helper(void); + +/* + * Create a kernel thread + */ +int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags) +{ + struct pt_regs regs; + + memset(®s, 0, sizeof(regs)); + + regs.si = (unsigned long) fn; + regs.di = (unsigned long) arg; + + regs.orig_ax = -1; + regs.ip = (unsigned long) kernel_thread_helper; + regs.cs = __KERNEL_CS; + regs.flags = X86_EFLAGS_IF; + + /* Ok, create the new process.. */ + return do_fork(flags | CLONE_VM | CLONE_UNTRACED, ~0UL, ®s, 0, NULL, NULL); +} +EXPORT_SYMBOL(kernel_thread); + void release_thread(struct task_struct *dead_task) { if (dead_task->mm) { |