Commit 7969f305 authored by Kairui Song's avatar Kairui Song Committed by Andrew Morton
Browse files

mm/gup: remove no longer used gup_fast_undo_dev_pagemap 

This helper is no longer used after commit fd2825b0 ("mm/gup: remove
pXX_devmap usage from get_user_pages()").

Link: https://lkml.kernel.org/r/20251219-gup-cleanup-v1-1-348a70d9eecb@tencent.com


Signed-off-by: default avatarKairui Song <kasong@tencent.com>
Acked-by: default avatarDavid Hildenbrand (Red Hat) <david@kernel.org>
Reviewed-by: default avatarAlistair Popple <apopple@nvidia.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Peter Xu <peterx@redhat.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 9c9828d3

mm/gup.c

+0 −11
Original line number Diff line number Diff line
@@ -2806,17 +2806,6 @@ static bool gup_fast_folio_allowed(struct folio *folio, unsigned int flags) 
	return !reject_file_backed || shmem_mapping(mapping);

}



static void __maybe_unused gup_fast_undo_dev_pagemap(int *nr, int nr_start,

		unsigned int flags, struct page **pages)

{

	while ((*nr) - nr_start) {

		struct folio *folio = page_folio(pages[--(*nr)]);



		folio_clear_referenced(folio);

		gup_put_folio(folio, 1, flags);

	}

}



#ifdef CONFIG_ARCH_HAS_PTE_SPECIAL

/*

 * GUP-fast relies on pte change detection to avoid concurrent pgtable