livepatch/arm64: only check stack top

hulk inclusion
category: feature
bugzilla: 119440 https://gitee.com/openeuler/kernel/issues/I4DDEL



--------------------------------

Based on the commit 'livepatch: checks only of the replaced instruction
is on the stack', the livepatch only needs to check the replaced
instructions during stack check.

If the instructions to be replaced do not contain a jump instruction,
the instructions may only appear at the top of the stack. Thus, after
confirming that the instructions to be replaced do not contain a jump
instruction, only the top of the stack instead of entire stack may be
checked.

Each function in livepatch has a force tag. When the value is
KLP_STACK_OPTIMIZE, the function of checking only the top of the stack
is enabled to speed up the check.

Signed-off-by: Ye Weihua <yeweihua4@huawei.com>
Reviewed-by: Yang Jihong <yangjihong1@huawei.com>
Signed-off-by: Chen Jun <chenjun102@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>