背景：LOS_UserMemClear接口原有实现是通过在内核中
申请一块堆内存并对其清零，调用copy_to_user来达到
对用户态内存清零的目的，需要使用堆内存。
修改方案：基于汇编实现内核对用户态内存清零的功能。

close #I3XXT0

Change-Id: I27cb1e45559cb75a9b330799fe427abd54f51c15
Signed-off-by: NHaryslee <lihao189@huawei.com>

Merge pull request !323 from Harylee/mem

Merge pull request !337 from jianjian/master

Merge pull request !347 from 刘建东/master

Merge pull request !351 from yuanbo/master

Merge pull request !344 from LeonChan/proc-uid

Merge pull request !345 from LeonChan/proc_fd

Merge pull request !352 from phchang/fix_test

【背景】mqueue144与mutex18门禁用例不稳定暂时下线

【修改方案】
将ItPosixQueue144.cpp与ItTestPthreadMutex018.cpp门禁用例暂时放入全量用例里面

re: #I3X4PR
Signed-off-by: Nvcbchang <vcbchang@qq.com>
Change-Id: I470c6bde70aa2b5956ac50a93f56776901774618

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>

Driver use product_path in hb env as hcs config root path
by default. If it's not exit, try to use device config path.

close: #I3PQ10
Signed-off-by: Nyuanbo <yuanbo@huawei.com>

Merge pull request !350 from 野生毛霉君/master

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>

Merge pull request !315 from kenneth/LOS_BitmapFfz

Merge pull request !314 from kenneth/BR_Tree

Merge pull request !334 from guweijie/master

Merge pull request !349 from 野生毛霉君/master

函数LOS_BitmapFfz有2个参数，注释中只描述了一个参数，丢失了对参数numBits的描述，影响导出API文档。补充函数注释的@param部分。

close #I3U3SF
Signed-off-by: kenneth <459864689@qq.com>

内存完整性校验原有逻辑中当检测到非零异常指针后仍继续访问异常指针
next的内存域导致系统异常。
本次修改后的逻辑为：检测到非零异常指针后直接退出循环，将异常指针
的相关信息输出即可，增加了goto逻辑。对原有功能逻辑无影响。

close #I3VJZT

Change-Id: I5be06a552cf9fd74d8bd78f5cdf04db06eab4f76
Signed-off-by: NHaryslee <lihao189@huawei.com>

close: I3WTLZ
Signed-off-by: Nmucor <mucorwang@gmail.com>

Merge pull request !348 from SimonLi/revert-merge-342-master

update lwip version to 2.1.2 for lwip_enhanced

close: #I3WL4J
Signed-off-by: Nliujiandong <liujiandong1@huawei.com>

Merge pull request !342 from 野生毛霉君/master

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>

Merge pull request !340 from JING/mount

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

Merge pull request !331 from Far/master

Signed-off-by: Njianjian <xingjian_liu@yeah.net>

Merge pull request !322 from 野生毛霉君/master

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>

1.modifications:
testsuites/unittest/time/timer/smoke/timer_test_tzset_001.cpp
testsuites/unittest/time/timer/smoke/timer_test_tzset_002.cpp
testsuites/unittest/time/timer/time_timer_test.cpp

2.influence:
none
Signed-off-by: Nteamol <28105285@qq.com>

Merge pull request !328 from guweijie/master

update typos in rb tree comment

close #I3U73B
Signed-off-by: kenneth <459864689@qq.com>

1.修改:
compat/posix/src/time.c文件中clock_gettime接口ESRCH返回值为EINVAL.
2.影响:
无.

fix #I3OUHI
Signed-off-by: Nteamol <28105285@qq.com>

Merge pull request !327 from Caoruihong/master

在init_cluster函数中，若未打开LOSCFG_FS_FAT_VIRTUAL_PARTITION会导致循环初始化
簇时，未调用sync_window函数，进而导致创建的文件夹未能正确置零。

Close #I3W1IW
Signed-off-by: NFar <yesiyuan2@huawei.com>

Merge pull request !316 from kenneth/LOS_DL_LIST_IS_END

Merge pull request !317 from kenneth/los_vm_map