[src/kservice.c] 修复 rt_vsnprintf 处理 size 和 buf 为 0 极端情况的 bug (对 0 地址写入)
Signed-off-by: NMurphyZhao <d2014zjt@163.com>

rt_tick_from_millisecond
当入参较大时，计算中间值会出现溢出情况，导致转换结果出错

[src]消除参数传递警告(warning: passing argument 1 of 'zoneindex' from incompatible pointer type [-Wincompatible-pointer-types])

function rt_timer_check(void) is already decleared in rtthread.h

When pthread invokes pthread_exit, it just detach self.

When suspend current thread and then enable interrupt, it's possible resume "the current thread" immediately and insert to ready queue. The rt_schedule_insert_thread should change  the status of "current thread" to RUNNING statue.

Signed-off-by: NMurphyZhao <d2014zjt@163.com>

sync smp skeleton

2 RTM_EXPORT(rt_cpus_lock_status_restore)
3 sync ARCH_CPU_STACK_GROWS_UPWARD in _rt_scheduler_stack_check()

[kernel]Change 'rt_timer_timeout_hook' function to 'rt_timer_enter_hook' and add 'rt_timer_exit_hook' hook function.