A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-28 18:51:56 -04:00
Code Issues Projects Releases Packages Wiki Activity

mm: remove write/force parameters from __get_user_pages_unlocked()

Browse source 
This removes the redundant 'write' and 'force' parameters from
__get_user_pages_unlocked() 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: Paolo Bonzini <[email protected]>
Reviewed-by: Jan Kara <[email protected]>
Acked-by: Michal Hocko <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Lorenzo Stoakes 2016-10-13 01:20:12 +01:00 • committed by Linus Torvalds
commit d4944b0ece
6 changed files with 34 additions and 19 deletions
Download patch file Download diff file Expand all files Collapse all files

3
virt/kvm/async_pf.c
View file

@ -84,7 +84,8 @@ static void async_pf_execute(struct work_struct *work)
* mm and might be done in another context, so we must
* use FOLL_REMOTE.
*/
__get_user_pages_unlocked(NULL, mm, addr, 1, 1, 0, NULL, FOLL_REMOTE);
__get_user_pages_unlocked(NULL, mm, addr, 1, NULL,
FOLL_WRITE | FOLL_REMOTE);
kvm_async_page_present_sync(vcpu, apf);

11
virt/kvm/kvm_main.c
View file

@ -1416,10 +1416,15 @@ static int hva_to_pfn_slow(unsigned long addr, bool *async, bool write_fault,
down_read(&current->mm->mmap_sem);
npages = get_user_page_nowait(addr, write_fault, page);
up_read(&current->mm->mmap_sem);
} else
} else {
unsigned int flags = FOLL_TOUCH | FOLL_HWPOISON;
if (write_fault)
flags |= FOLL_WRITE;
npages = __get_user_pages_unlocked(current, current->mm, addr, 1,
write_fault, 0, page,
FOLL_TOUCH|FOLL_HWPOISON);
page, flags);
}
if (npages != 1)
return npages;