write "clear pathcahe" to clear pathcaches and vnodes
write "clear pagecache" to clear pagecaches
write "clear all" to clear both pathcaches and pagechaches
the cache in use will not be cleared

close: #I3XLPH
Signed-off-by: Nmucor <mucorwang@gmail.com>

功能描述：
  在proc目录下增加power目录，添加powr_mode,power_lock,power_unlock和power_count节点，
  power_mode：节点用于查询和设置系统支持的功耗模式
  power_lock：用于查询和获取低功耗锁，持锁后，将会阻止系统进入低功耗状态
  power_unlock:　用于释放已经持有的低功耗锁，也可查询当前有那些持有低功耗锁
  power_count：用于查询当前持有低功耗锁的个数

Close #I3VS5N

Change-Id: I2e2881cc968eab3c5fa6f9dbd7e8c5e448609407
Signed-off-by: Nzhushengle <zhushengle@huawei.com>

显示信息内容及格式修改为与posix标准一致，内容包括：
1、挂载设备名
2、挂载点路径
3、文件系统类型
4、挂载选项（此项暂不支持，打印（））
5、dump频率（此项暂不支持，值为0）
6、fsck检查次序（此项暂不支持，值为0）

close #I3XGCS
Signed-off-by: Nchenjing <chenjing139@huawei.com>
Change-Id: I2a8cb093e7c5316feb55fb196bc1b4301d8d0249

1, for users with privilege, display all users' fd info with the template "Pid  Fd  SysFd Path"
2, for normal user, display its own fd info with the template "Pid Fd Path"

close #I3WB5U
Signed-off-by: Nchenwei <chenwei26@huawei.com>

close: #I3WGVP
Signed-off-by: Nchenwei <chenwei26@huawei.com>

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

close: #I3WWBD
Signed-off-by: Nmucor <mucorwang@gmail.com>

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>

close #I3W2M9
Signed-off-by: Nchenjing <chenjing139@huawei.com>
Change-Id: If8ba7047e2914a3104182bf017f437c2ae962625

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>

close: #I3T6MZ
Signed-off-by: Nli_zan <371442490@qq.com>

close: #I3I768

Change-Id: I4f801df4abe1a9afdf43391c28276e96a5e81513

Change-Id: I052d930d54e63179b17b77f02c107a015f3cfc3f

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

Change-Id: Ie1029c8fbc0c1b85c138663933118d2d148b7769

Change-Id: Ic443742e125915f0e5332a338dedea5c40348928

Feature or Bugfix:Feature
Binary Source:Huawei
PrivateCode(Yes/No):Yes

Change-Id: I175d2648bc6f9078c34de2c0a5c93fda10b86c47
ChangeID:13306388