[PATCH v8 02/12] x86_64: load_percpu_segment: read irq_stack_union.gs_base before load_segment

Reading irq_stack_union.gs_base after load_segment creates troubles for kasan. Compiler inserts __asan_load in between load_segment and wrmsrl. If kernel built with stackprotector this will result in boot failure because __asan_load has stackprotector. To avoid this irq_stack_union.gs_base stored

[PATCH v8 02/12] x86_64: load_percpu_segment: read irq_stack_union.gs_base before load_segment

Reading irq_stack_union.gs_base after load_segment creates troubles for kasan. Compiler inserts __asan_load in between load_segment and wrmsrl. If kernel built with stackprotector this will result in boot failure because __asan_load has stackprotector. To avoid this irq_stack_union.gs_base stored