Commit 0cad6736 authored by Feng Lee's avatar Feng Lee Committed by Andrew Morton
Browse files

mm: remove obsolete pgd_offset_gate() 

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: default avatarFeng Lee <379943137@qq.com>
Reviewed-by: default avatarBarry Song <baohua@kernel.org>
Acked-by: default avatarDavid 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: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 3c06ee7c

include/linux/pgtable.h

+0 −4
Original line number Diff line number Diff line
@@ -1164,10 +1164,6 @@ static inline void arch_swap_restore(swp_entry_t entry, struct folio *folio) 
}

#endif



#ifndef __HAVE_ARCH_PGD_OFFSET_GATE

#define pgd_offset_gate(mm, addr)	pgd_offset(mm, addr)

#endif



#ifndef __HAVE_ARCH_MOVE_PTE

#define move_pte(pte, old_addr, new_addr)	(pte)

#endif

mm/gup.c

+1 −4
Original line number Diff line number Diff line
@@ -1102,10 +1102,7 @@ static int get_gate_page(struct mm_struct *mm, unsigned long address, 
	/* user gate pages are read-only */

	if (gup_flags & FOLL_WRITE)

		return -EFAULT;

	if (address > TASK_SIZE)

		pgd = pgd_offset_k(address);

	else

		pgd = pgd_offset_gate(mm, address);

	pgd = pgd_offset(mm, address);

	if (pgd_none(*pgd))

		return -EFAULT;

	p4d = p4d_offset(pgd, address);