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mm: replace get_user_pages_unlocked() write/force parameters with gup_flags

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This removes the 'write' and 'force' use from get_user_pages_unlocked()
and replaces them with 'gup_flags' to make the use of FOLL_FORCE
explicit in callers as use of this flag can result in surprising
behaviour (and hence bugs) within the mm subsystem.

Signed-off-by: Lorenzo Stoakes <lstoakes@gmail.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Acked-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Lorenzo Stoakes
2016-10-13 01:20:13 +01:00
committed by Linus Torvalds
parent d4944b0ece
commit c164154f66
14 changed files with 27 additions and 36 deletions
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3
mm/util.c
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@@ -283,7 +283,8 @@ EXPORT_SYMBOL_GPL(__get_user_pages_fast);
int __weak get_user_pages_fast(unsigned long start,
int nr_pages, int write, struct page **pages)
{
return get_user_pages_unlocked(start, nr_pages, write, 0, pages);
return get_user_pages_unlocked(start, nr_pages, pages,
write ? FOLL_WRITE : 0);
}
EXPORT_SYMBOL_GPL(get_user_pages_fast);