Messages in this thread Patch in this message | | | Date | Wed, 19 Oct 2022 14:31:15 +0200 | Subject | Re: [PATCH v1 7/7] selftests/vm: anon_cow: add R/O longterm tests via gup_test | From | David Hildenbrand <> |
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On 27.09.22 13:01, David Hildenbrand wrote: > Let's trigger a R/O longterm pin on three cases of R/O mapped anonymous > pages: > * exclusive (never shared) > * shared (child still alive) > * previously shared (child no longer alive) > > ... and make sure that the pin is reliable: whatever we write via the page > tables has to be observable via the pin. > > Signed-off-by: David Hildenbrand <david@redhat.com> > ---
The following on top should silence the warning on 32bit:
https://lore.kernel.org/all/202210182101.XOyPZEQV-lkp@intel.com/T/#u
diff --git a/mm/gup_test.c b/mm/gup_test.c index 2bbfacd31f5a..57c343f2dc51 100644 --- a/mm/gup_test.c +++ b/mm/gup_test.c @@ -299,7 +299,8 @@ static inline int pin_longterm_test_read(unsigned long arg) for (i = 0; i < pin_longterm_test_nr_pages; i++) { void *addr = page_to_virt(pin_longterm_test_pages[i]); - if (copy_to_user((void __user *)user_addr, addr, PAGE_SIZE)) + if (copy_to_user((void __user *)(unsigned long)user_addr, addr, + PAGE_SIZE)) return -EFAULT; user_addr += PAGE_SIZE; }
-- Thanks,
David / dhildenb
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