arm64: replace is_compat_task() with is_ilp32_compat_task() in TASK_SIZE_MAX

hulk inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I4V6F8


CVE: NA

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access_ok() is used to preliminarily check 'uaddr' to avoid unnecessary
page fault caused by invalid input. The page fault will do the accurate
address verification based on task's mm. It's also used to do a check on
the get_fs(), see the comments of __access_ok().

But now the support for get_fs() on arm64 has been deleted by commit
edf84200 ("arm64: uaccess: remove set_fs()"). So access_ok()
does not need to perform such strict checks for compat tasks.

Remove the is_compact_task() check can improve the performance of
syscalls. For example, all test items of libMicro can be improved by
4.89% on average.

The next patch will avoid calling is_ilp32_compat_task() by default by
close its build option, because ILP32 has specific requirements.

Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Reviewed-by: Cheng Jian <cj.chengjian@huawei.com>
Reviewed-by: liuchao (CR) <liuchao173@huawei.com>
Reviewed-by: Liu Chao (CR) < liuchao173@huawei.com >
Reviewed-by: Xiongfeng Wang <wangxiongfeng2@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>