新增sync方法，该方法每次调用，会遍历系统内所有的mount点，调用各个文件系统注册
的sync方法，完成对所有已挂载文件系统的sync操作。
close #I480HV
Signed-off-by: Guangyao Ma <guangyao.ma@outlook.com>
Change-Id: I57ced9c3f7685a448defd17ae56c842796b5668f
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: mucor <mucorwang@gmail.com>
1. Bcache block with high mem address is after lower mem address in RCU list when initing bcache.
2. Format will clear the bcache before writing the FAT.
3. The fatfs_readdir use the bcache writing block to reduce the chance of data switching out
4. Add performance analysing macron switch
Change-Id: I8fbc48418509d2e660d725d2c265266e931c26f8
arvinzzz
x_xiny
Guangyao Ma
Caoruihong
mucor
Far
wangchenyang
mamingshuai
wenjun