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

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This removes the 'write' and 'force' from get_user_pages() 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 <[email protected]>
Acked-by: Christian König <[email protected]>
Acked-by: Jesper Nilsson <[email protected]>
Acked-by: Michal Hocko <[email protected]>
Reviewed-by: Jan Kara <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Lorenzo Stoakes 2016-10-13 01:20:16 +01:00 • committed by Linus Torvalds
commit 768ae309a9
22 changed files with 49 additions and 54 deletions
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5
arch/x86/mm/mpx.c
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@ -544,10 +544,9 @@ static int mpx_resolve_fault(long __user *addr, int write)
{
long gup_ret;
int nr_pages = 1;
int force = 0;
gup_ret = get_user_pages((unsigned long)addr, nr_pages, write,
force, NULL, NULL);
gup_ret = get_user_pages((unsigned long)addr, nr_pages,
write ? FOLL_WRITE : 0, NULL, NULL);
/*
* get_user_pages() returns number of pages gotten.
* 0 means we failed to fault in and get anything,