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mm/gup: remove pin_user_pages_fast_only() 

Commit ed29c26911 ("drm/i915: Fix userptr so we do not have to worry
about obj->mm.lock, v7.") removed the only caller, remove this dead code
too.

Link: https://lkml.kernel.org/r/10-v2-987e91b59705+36b-gup_tidy_jgg@nvidia.com
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Acked-by: Mike Rapoport (IBM) <rppt@kernel.org>
Reviewed-by: John Hubbard <jhubbard@nvidia.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Claudio Imbrenda <imbrenda@linux.ibm.com>
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Jason Gunthorpe 2023-01-24 16:34:31 -04:00 committed by Andrew Morton
parent 9a863a6a51
commit edad1bb1fb
2 changed files with 0 additions and 35 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
include/linux/mm.h
View File

@ -2261,8 +2261,6 @@ extern int mprotect_fixup(struct vma_iterator *vmi, struct mmu_gather *tlb,
*/
int get_user_pages_fast_only(unsigned long start, int nr_pages,
unsigned int gup_flags, struct page **pages);
int pin_user_pages_fast_only(unsigned long start, int nr_pages,
unsigned int gup_flags, struct page **pages);
static inline bool get_user_page_fast_only(unsigned long addr,
unsigned int gup_flags, struct page **pagep)

33
mm/gup.c
View File

@ -3102,39 +3102,6 @@ int pin_user_pages_fast(unsigned long start, int nr_pages,
}
EXPORT_SYMBOL_GPL(pin_user_pages_fast);
/*
* This is the FOLL_PIN equivalent of get_user_pages_fast_only(). Behavior
* is the same, except that this one sets FOLL_PIN instead of FOLL_GET.
*
* The API rules are the same, too: no negative values may be returned.
*/
int pin_user_pages_fast_only(unsigned long start, int nr_pages,
unsigned int gup_flags, struct page **pages)
{
int nr_pinned;
/*
* FOLL_FAST_ONLY is required in order to match the API description of
* this routine: no fall back to regular ("slow") GUP.
*/
if (!is_valid_gup_args(pages, NULL, NULL, &gup_flags,
FOLL_PIN | FOLL_FAST_ONLY))
return 0;
nr_pinned = internal_get_user_pages_fast(start, nr_pages, gup_flags,
pages);
/*
* This routine is not allowed to return negative values. However,
* internal_get_user_pages_fast() *can* return -errno. Therefore,
* correct for that here:
*/
if (nr_pinned < 0)
nr_pinned = 0;
return nr_pinned;
}
EXPORT_SYMBOL_GPL(pin_user_pages_fast_only);
/**
* pin_user_pages_remote() - pin pages of a remote process
*