【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>

【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>

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

Merge pull request !682 from zhushengle/test

Merge pull request !664 from zhushengle/Join

Merge pull request !669 from zhushengle/rlimit

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

【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>

Merge pull request !655 from LeonChan/execfile

close: #I4DAKM
Signed-off-by: Nzff <zhangfanfan2@huawei.com>
Change-Id: I5acc8b2b632633b0717eb4186773e6cae35ea0e4

Merge pull request !660 from LiteOS/master

Merge pull request !659 from 刘建东/master

    close #I4DQ1X
Signed-off-by: NLiteOS2021 <dinglu@huawei.com>

Change-Id: I79b416720f5327749a5884a65a5e61db07f2a17c

add option SIOCGIFBRDADDR for ioctl

close: #I4DNRF
Signed-off-by: Nliujiandong <liujiandong1@huawei.com>

Merge pull request !651 from Harylee/shm

1. LOS_TraceStop接口的功能描述应该是stop

close: #I4CYPZ
Signed-off-by: Narvinzzz <zhaotianyu9@huawei.com>
Change-Id: Iee0cf43f6e5ee8e544e233c0c307725c5bfebdcf

【背景】
https://gitee.com/openharmony/kernel_liteos_a/pulls/520
上面修改，信号处理时才会释放申请的内存，当信号被屏蔽，且一直发送该信号时，
内存占用会不断变大
【修改方案】
1.
信号发送时已经有该信号的siginfo在链表中时，不再重新申请，重复使用之前的siginfo.

【影响】
对现有的产品编译不会有影响。

re#I4DEG5
Signed-off-by: Nlanleinan <lanleinan@163.com>

Change-Id: I74b3b7ff0b9efb0179313af9a0c8d1e12d1db5bb

Merge pull request !650 from zhangfanfan2/master

Merge pull request !652 from zhangfanfan2/other

Merge pull request !631 from zhushengle/process

方案：硬随机不可用时，默认使用软随机数代替硬随机数

close #I4D4TK
Signed-off-by: NHaryslee <lihao189@huawei.com>
Change-Id: Ia7d2a9583257d7b8041b8994a70a7c36149c33fb

当设置的超时时间比较短时，会出现absTime为0的情况，直接返回，不需要阻塞和打印。

close: #I4D67E
Signed-off-by: Nzff <zhangfanfan2@huawei.com>