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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 <lstoakes@gmail.com>
Acked-by: Christian König <christian.koenig@amd.com>
Acked-by: Jesper Nilsson <jesper.nilsson@axis.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 01:20:16 +01:00 • committed by Linus Torvalds
parent 7f23b3504a
commit 768ae309a9
22 changed files with 49 additions and 54 deletions
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3
drivers/platform/goldfish/goldfish_pipe.c
View file

@ -309,7 +309,8 @@ static ssize_t goldfish_pipe_read_write(struct file *filp, char __user *buffer,
* much memory to the process.
*/
down_read(&current->mm->mmap_sem);
ret = get_user_pages(address, 1, !is_write, 0, &page, NULL);
ret = get_user_pages(address, 1, is_write ? 0 : FOLL_WRITE,
&page, NULL);
up_read(&current->mm->mmap_sem);
if (ret < 0)
break;