add /proc/fs_cache to display vnode, path cache, page cache.
also change some bad virable name

close: #I3WESD
Signed-off-by: Nmucor <mucorwang@gmail.com>

1.remove redundant headfile in kernel, such as:
  compiler.h;debug.h;automount.h;inode.h;syslog.h;net.h;
2.split fs.h to file.h and driver.h
3.move vnode.h and path_cache.h to vfs/include
4.remove redundant interface and defines

close: #I3RTNR
Signed-off-by: Nmucor <mucorwang@gmail.com>

rename function OsCreateUserVmSpace to fix typo

close https://gitee.com/openharmony/kernel_liteos_a/issues/I3QD42Signed-off-by: kenneth <459864689@qq.com>

fix typo destroy

close https://gitee.com/openharmony/kernel_liteos_a/issues/I3RR17Signed-off-by: Kenneth <459864689@qq.com>

　用户态线程在用户态处于while(1), 在中断处理时使该线程处于READY状态，
此时进程退出时该线程无法被正常回收，导致进程无法合理退出。

Close #I3V8R5

Change-Id: I7f83f5f7fe41c03eb602bf78cfd33fff1b0acdb7
Signed-off-by: Nzhushengle <zhushengle@huawei.com>

support turn off as many features as possible.
current only libc and posix and bsd can not be turned off.
Signed-off-by: NCaoruihong <crh.cao@huawei.com>
Change-Id: I1e97570c67593207a56dc11f357eca4b4a018bfd

【背景】当前timer_create接口不支持以SIGEV_THREAD的方式创建多个定时器

【修改方案】
1、内核timer_create接口在创建software timers相应的线程时，使用线程
taskCB所携带的信息识别各个线程的信号并依据该信息分别派发出信号。
2、关于用户任务操作许可验证的修改，现在允许同一用户线程向其自身派发信
号，软件定时器计时结束，向用户态发送相应的信号，完成用户态线程的回调。

【影响】
对现有的产品暂无影响。

re #I3SRFI
Signed-off-by: yansira <yansira@hotmail.com>
Change-Id: Ia23f5ef01975bf867dd7f5db797a30c264c50501

背景: 当前信号实现原理是在系统调用结束和中断结束时检查是否有信号处理,
      如果有信号处理就切去处理信号，信号处理结束后回来继续按原来流程执行。
问题：当用户态线程在执行系统调用或缺页异常时，运行在内核态，如果此时有信
      号需要处理，且该线程已经持有了部分内核资源(如：锁，内存等), 此时如
      果有中断发生，则在中断结束时，就会去处理该信号，此时用户态线程持有
      了内核未释放的资源跑到了用户态去运行，如果该线程在用户态出现问题,
      那么它持有的内核资源就无法被释放了。
方案：用户态线程在执行系统调用和缺页异常时暂时屏蔽信号，防止此时有中断去
      处理信号，等系统调用结束或缺页异常结束时再去处理信号。
解决的问题：
  1. 执行系统调用或缺页异常时屏蔽信号，防止中断去处理信号
  2.解决无法kill 因为用户态的锁、ipc等阻塞的用户态线程
  3.进程退出方式转变为: 依次通过kill去杀死该进程的所有线程

Close #I3S0N0

Change-Id: I0c48b9c89382826191b8a9326c71b57ba84124c2

close: #I3SDKY

Change-Id: I5ed9356ce2b55b6e07c3f192cdbc4a4f6fbfaa58

close: #I3I768

Change-Id: I4f801df4abe1a9afdf43391c28276e96a5e81513

Close #I3QMN1

Change-Id: I0ddd0c4474f5f6b5a2b1dd6608d642167b5548e6

correct function name OsSchedSetIdleTaskSchedParam

close https://gitee.com/openharmony/kernel_liteos_a/issues/I3RQ6J

Delete redundant judgments.

Close #I3P10Y and #I3QNLT

Change-Id: Ibaf5d4da46f12c291619bb88a41ac18af4612ca1

Change-Id: I131c70e52d907b6c52232596475f2dba16612fce

Close #I3OAFR

Change-Id: I25b14572809b6fabb9e9d17de89a99047c02a59b

correct some typos in los_task.c and other files

close https://gitee.com/openharmony/kernel_liteos_a/issues/I3QDB8

storage medium is separated from the shell module.

Change-Id: Id56939001d70bb92d9cc02bd7c9f55ca8b61cf5b

fix: Sortlink, the response time to insert the node should be inserted into the back of the existing node.

Close #I3PSJ8

Change-Id: Ib630ba4febbc21d4f25af0961f5c996eadf4e054

Change-Id: Id75a1b146766f448838afc80ad11cfd9d990e94e

Change-Id: Iecd1a896f92522ecc75d099c23761969a83b1d29

Change-Id: I8662952ac9d7912aaf2e2e72f779b3def41d14c4

Close #I3OAFR

Change-Id: Icea238e20adf402d0ec1fc7e47ff4e58124a5e83

Change-Id: I626a96376fe6bee69b10ee9b56495d62849c19b7

Change-Id: Ib068696c9280105e209469e875c187d741b704d2

Change-Id: I052d930d54e63179b17b77f02c107a015f3cfc3f

Change-Id: I8d2e9f96e86f4130474da9898791240b5d42328e

Description:Fix related interface competition issues.
Sig:liteos_a
Feature or Bugfix:Bugfix
Binary Source:No

Change-Id: I1198408be9ce577bbf0735e3da53d0834622f429

Change-Id: Ie48b96fe9c8ab036d7234b56a169d6668171a895

Description: Fix watchdog macro bug
Sig:kernel
Feature or Bugfix: Bugfix
Binary Source: No

Change-Id: I5ca037ef20eb65578b804e314617953bfbf6c35b

Change-Id: Ia42e914b7a19b7d519010e371f808baa1c6588c0

Description:Delete VM to support only kernel mode.
Sig:liteos_a
Feature or Bugfix:Feature
Binary Source:No

Change-Id: Ie1029c8fbc0c1b85c138663933118d2d148b7769

Description:Scheduling module has signed number and unsigned number comparison.
Sig:kernel
Feature or Bugfix:Bugfix
Binary Source:No

Change-Id: Ie6385e5ab779b6b542282198b38c966871b03c8e

Description:Change the exception error message to Panic to clarify what normal does not return.
Sig:kernel
Feature or Bugfix:Bugfix
Binary Source:No

Change-Id: Ie7087cafe709f79604831f6d3eefcee6fe48ccbb