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

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This removes the 'write' and 'force' use from get_user_pages_locked()
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>
Acked-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Lorenzo Stoakes
2016-10-13 01:20:14 +01:00
committed by Linus Torvalds
parent c164154f66
commit 3b913179c3
4 changed files with 15 additions and 12 deletions
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mm/nommu.c
+4 -1
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@@ -176,9 +176,12 @@ long get_user_pages(unsigned long start, unsigned long nr_pages,
EXPORT_SYMBOL(get_user_pages);
long get_user_pages_locked(unsigned long start, unsigned long nr_pages,
int write, int force, struct page **pages,
unsigned int gup_flags, struct page **pages,
int *locked)
{
int write = gup_flags & FOLL_WRITE;
int force = gup_flags & FOLL_FORCE;
return get_user_pages(start, nr_pages, write, force, pages, NULL);
}
EXPORT_SYMBOL(get_user_pages_locked);