When the driver is loaded on the system with numa nodes it might be run in
a kthread, which makes it impossible to use current->mm in the selftest.
This patch allows the selftest to use current->mm by using active_mm.
Signed-off-by: Mikolaj Wasiak <mikolaj.wasiak@xxxxxxxxx>
Reviewed-by: Eugene Kobyak <eugene.kobyak@xxxxxxxxx>
---
v1 -> v2: Simplify logic of enabling and disabling active_mm
drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c | 14 +++++++++++++-
1 file changed, 13 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c
index 804f74084bd4..9c3f17e51885 100644
--- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c
+++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_mman.c
@@ -1837,6 +1837,8 @@ static int igt_mmap_revoke(void *arg)
int i915_gem_mman_live_selftests(struct drm_i915_private *i915)
{
+ int ret;
+ bool unuse_mm = false;
static const struct i915_subtest tests[] = {
SUBTEST(igt_partial_tiling),
SUBTEST(igt_smoke_tiling),
@@ -1848,5 +1850,15 @@ int i915_gem_mman_live_selftests(struct drm_i915_private *i915)
SUBTEST(igt_mmap_gpu),
};
- return i915_live_subtests(tests, i915);
+ if (!current->mm) {
+ kthread_use_mm(current->active_mm);
+ unuse_mm = true;
+ }
+
+ ret = i915_live_subtests(tests, i915);
+
+ if (unuse_mm)
+ kthread_unuse_mm(current->active_mm);
+
+ return ret;
}
--
2.43.0
