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Remove pgd_offset_gate() completely and simply make the single caller use pgd_offset(). It appears that the gate area resides in the kernel-mapped segment exclusively on IA64. Therefore, removing pgd_offset_k is safe since IA64 is now obsolete. Link: https://lkml.kernel.org/r/tencent_503130C3CD56569191396268CF4D12F09A06@qq.com Signed-off-by: Feng Lee <379943137@qq.com> Reviewed-by: Barry Song <baohua@kernel.org> Acked-by: David Hildenbrand <david@redhat.com> Cc: Anshuman Khandual <anshuman.khandual@arm.com> Cc: bibo mao <maobibo@loongson.cn> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jason Gunthorpe <jgg@ziepe.ca> Cc: John Hubbard <jhubbard@nvidia.com> Cc: Lance Yang <lance.yang@linux.dev> Cc: Peter Xu <peterx@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>