From dadbb612f6e50bbf9101c2f5d82690ce9ea4d66b Mon Sep 17 00:00:00 2001 From: Souptick Joarder Date: Sun, 7 Jun 2020 21:40:55 -0700 Subject: mm/gup.c: convert to use get_user_{page|pages}_fast_only() API __get_user_pages_fast() renamed to get_user_pages_fast_only() to align with pin_user_pages_fast_only(). As part of this we will get rid of write parameter. Instead caller will pass FOLL_WRITE to get_user_pages_fast_only(). This will not change any existing functionality of the API. All the callers are changed to pass FOLL_WRITE. Also introduce get_user_page_fast_only(), and use it in a few places that hard-code nr_pages to 1. Updated the documentation of the API. Signed-off-by: Souptick Joarder Signed-off-by: Andrew Morton Reviewed-by: John Hubbard Reviewed-by: Paul Mackerras [arch/powerpc/kvm] Cc: Matthew Wilcox Cc: Michael Ellerman Cc: Benjamin Herrenschmidt Cc: Peter Zijlstra Cc: Ingo Molnar Cc: Mark Rutland Cc: Alexander Shishkin Cc: Jiri Olsa Cc: Namhyung Kim Cc: Paolo Bonzini Cc: Stephen Rothwell Cc: Mike Rapoport Cc: Aneesh Kumar K.V Cc: Michal Suchanek Link: http://lkml.kernel.org/r/1590396812-31277-1-git-send-email-jrdr.linux@gmail.com Signed-off-by: Linus Torvalds --- include/linux/mm.h | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) (limited to 'include/linux') diff --git a/include/linux/mm.h b/include/linux/mm.h index 86adc71a972f..22010c4175f2 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -1824,10 +1824,16 @@ extern int mprotect_fixup(struct vm_area_struct *vma, /* * doesn't attempt to fault and will return short. */ -int __get_user_pages_fast(unsigned long start, int nr_pages, int write, - struct page **pages); +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) +{ + return get_user_pages_fast_only(addr, 1, gup_flags, pagep) == 1; +} /* * per-process(per-mm_struct) statistics. */ -- cgit v1.3-6-gb490