mm: Fix kabi change caused by saved_auxv[] in mm_struct for x86_64

openeuler inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I5RQLJ


CVE: NA

Intel-SIG: mm: Fix kabi change caused by saved_auxv[] in mm_struct for x86_64.

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Use the KABI_DEPRECATE and KABI_USE macro to fix kabi change caused by commit 1c33bb05 ("x86/elf: Support a new ELF
aux vector AT_MINSIGSTKSZ").

The extended saved_auxv[] causes the kabi breakage, move the saved_auxv[] to the end of struct mm_struct.
To avoid introducing too many size increase of mm_struct, use a pointer to indirectly reference the relocated saved_auxv[], then adapt the code where
mm->saved_auxv is used.

Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>
Signed-off-by: Lin Wang <lin.x.wang@intel.com>
Signed-off-by: Aichun Shi <aichun.shi@intel.com>