【背景】增加内核epoll系统调用适配musl接口并增加测试用例

【修改方案】
1, 删除musl仓的porting
2，内核实现epoll对应接口及注册系统调用
3，testsuit目录添加对应的用例

【影响】
对现有的产品编译不会有影响。

re #I4FXPT
Signed-off-by: Nwangchen <253227059@qq.com>

Change-Id: Ia97ea49067aa1ff47b8c1c83675ac75e75d25955

Merge pull request !687 from zhushengle/liteipc

Merge pull request !676 from pef/ppoll-1

【背景】
1.内核中释放用户空间指针报错:"[ERR]OsMemFree check error!"
2.现有ppoll实现存在问题
3.相关用例需要整理
【修改方案】
1.去掉释放用户空间指针操作
2.更正逻辑错误
3.更正掩码设置与恢复不起作用
4.修复补充现有用例
【影响】
对现有的产品编译不会有影响。

re #I47YWZ

Change-Id: Ib2f60986e9cafb2ea5ef1097ab8552cbb1ede5b4
Signed-off-by: Nlnlan <lanleinan@163.com>

Close #I4G4HP
Signed-off-by: Nzhushengle <zhushengle@huawei.com>
Change-Id: I259c792365d9747f391c5bd275e77f04b83e0792

Merge pull request !679 from kenneth/los_vm_phys

Merge pull request !690 from kenneth/typos

变量readTasks应该为readyTasks；函数OsSchedTaskSwicth应该为OsSchedTaskSwitch；其他拼写错误。

close #I4GFJ7
Signed-off-by: Nkenneth <zhushangyuan@huawei.com>

Merge pull request !685 from zhushengle/liteipc

Merge pull request !665 from lnlan/sys_misc_test_fix

【背景】
内核中释放用户空间指针报错:"[ERR]OsMemFree check error!"

【修改方案】
修改SysPpoll函数。

【影响】
对现有的产品编译不会有影响。

re #I47YWZ

Change-Id: Id7f86036870d4f32be8fc438b9aad85cdda59546
Signed-off-by: pef <cyd1997@126.com>

LosTaskCB 中 字段waitFlag 用于专门记录任务被阻塞的原因，与ipcStatus 功能重复
Close #I4FVHK
Signed-off-by: Nzhushengle <zhushengle@huawei.com>
Change-Id: Ie0998b987ba6e1db050596dec3b359e73ca47686

Merge pull request !683 from zhushengle/liteipc

1.modifications:
modified:   syscall/fs_syscall.c
2.modify 2 testcases:
IO/full/IO_test_ppoll_001.cpp
IO/full/IO_test_ppoll_002.cpp
3.influence:
none
Signed-off-by: pef <cyd1997@126.com>
Change-Id: I85fc091098a6dfef1a4694a3bbc489640ee6dda2

Close #I4FSA7
Signed-off-by: Nzhushengle <zhushengle@huawei.com>
Change-Id: I8b24a1e1554b4b867a841bc1b6765cbfd648cdbd

Merge pull request !682 from zhushengle/test

Merge pull request !664 from zhushengle/Join

Merge pull request !669 from zhushengle/rlimit

【背景】
1.etc/hosts文件不存在，misc09依赖hosts文件而失败

【修改方案】
1.用例执行前检查是否存在这些配置文件，不存在就跳过该用例

re#I48IZ0

Change-Id: I193cb03770932c1f681cd726ceb383816aa2257a
Signed-off-by: Nlnlan <lanleinan@163.com>
Change-Id: I3fb7ca1ed5f8cc79a56cd1872f3b303ab325a7a9

Merge pull request !670 from shenchenkai/master

Merge pull request !666 from lnlan/sys_test_fixed

Close #I4FO0N
Signed-off-by: Nzhushengle <zhushengle@huawei.com>
Change-Id: I9dc9819f2ebceaceea337651cc747d737e437661

删除OsVmPhysFreeListAdd/OsVmPhysFreeListAddUnsafe、OsVmPhysFreeListDel/OsVmPhysFreeListDelUnsafe两对内部函数内容重复的部分。

close #I4FL95
Signed-off-by: Nkenneth <zhushangyuan@huawei.com>

【背景】
1.sys部分用例因依赖passwd、group文件而失败

【修改方案】
1.用例执行前检查是否存在这些配置文件，不存在就跳过该用例

re#I48IUC

Change-Id: I787ce4b200f2a7546e57290b7dd073127caa07bb
Signed-off-by: Nlnlan <lanleinan@163.com>

Merge pull request !673 from uhamc/fix-apps-shell-build

Merge pull request !658 from wangchen/pselect

Merge pull request !656 from lnlan/sigwait_patch

Change-Id: Id3f56ac53ec5a3c86b04bcb7a4611f2eb77f4b80
Signed-off-by: Nuhamc <uhamc@foxmail.com>

Merge pull request !671 from zhushengle/test

Close #I4F1XL
Signed-off-by: Nzhushengle <zhushengle@huawei.com>
Change-Id: Ifdde21a2ff4213218a0fa44ad17af0c15a426758

1.modifications:
modified:   syscall/fs_syscall.c
modified:   syscall/los_syscall.h
modified:   syscall/syscall_lookup.h
2.add 1 testcases:
modified:   testsuites/unittest/IO/BUILD.gn
modified:   testsuites/unittest/IO/full/IO_test_pselect_001.cpp
modified:   testsuites/unittest/IO/io_test.cpp
3.influence:
none

re #I45SXU
Signed-off-by: Nwangchen <253227059@qq.com>
Change-Id: I03a5d464fd5423c360e42f7d141035ce0d83d8a8

Change-Id: I9310fe807ec95721be78deb60ed9728ef9b56e48
Signed-off-by: Nshenchenkai <shenchenkai@huawei.com>

Close #I4EZY5
Signed-off-by: Nzhushengle <zhushengle@huawei.com>
Change-Id: I47ed0ff7a52f72e38875c3308b20e183cc5c4563

Merge pull request !667 from zhushengle/test

Close #I4EOGA
Signed-off-by: Nzhushengle <zhushengle@huawei.com>
Change-Id: I0f10f81d41564d4d34fc2f89692da0b3211f5918

Merge pull request !661 from Far/master

Close #I4EENF
Signed-off-by: Nzhushengle <zhushengle@huawei.com>
Change-Id: Iaa1582f567eb3524262bea383e0b8238b89b5fe2

Merge pull request !654 from zhangfanfan2/master

Merge pull request !657 from Zhaotianyu/1012trace_fix

优化包括：
1. 提供VnodeLookupFullpath接口，如果路径是规范化的路径，则调用此接口可减少一次vfs_normalizepath接口的调用;
2. fatfs open钩子函数FIL和buffer同时malloc，减少一次malloc调用，同时去除不必要的数据写回;
3. 其他小细节的优化。

Close #I4E0CT
Signed-off-by: NFar <yesiyuan2@huawei.com>