int nr;
struct page **pages;
int ret = 0;
+ bool needs_mmap_lock =
+ cmd != GUP_FAST_BENCHMARK && cmd != PIN_FAST_BENCHMARK;
if (gup->size > ULONG_MAX)
return -EINVAL;
if (!pages)
return -ENOMEM;
+ if (needs_mmap_lock && mmap_read_lock_killable(current->mm)) {
+ ret = -EINTR;
+ goto free_pages;
+ }
+
i = 0;
nr = gup->nr_pages_per_call;
start_time = ktime_get();
pages + i, NULL);
break;
default:
- kvfree(pages);
ret = -EINVAL;
- goto out;
+ goto unlock;
}
if (nr <= 0)
end_time = ktime_get();
gup->put_delta_usec = ktime_us_delta(end_time, start_time);
+unlock:
+ if (needs_mmap_lock)
+ mmap_read_unlock(current->mm);
+free_pages:
kvfree(pages);
-out:
return ret;
}