[PATCH] drm/msm/gem: Add missing rcu_dereference()

[Rob Clark]

From: Rob Clark <robdclark@xxxxxxxxxxxx>

Fixes a sparse "different address spaces" error.

Reported-by: kernel test robot <lkp@xxxxxxxxx>
Closes: https://lore.kernel.org/oe-kbuild-all/202406280050.syeEwLTE-lkp@xxxxxxxxx/
Signed-off-by: Rob Clark <robdclark@xxxxxxxxxxxx>
---
 drivers/gpu/drm/msm/msm_gem.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c
index ddc6a131c041..ebc9ba66efb8 100644
--- a/drivers/gpu/drm/msm/msm_gem.c
+++ b/drivers/gpu/drm/msm/msm_gem.c
@@ -48,7 +48,7 @@ static void update_ctx_mem(struct drm_file *file, ssize_t size)
 	uint64_t ctx_mem = atomic64_add_return(size, &ctx->ctx_mem);
 
 	rcu_read_lock(); /* Locks file->pid! */
-	trace_gpu_mem_total(0, pid_nr(file->pid), ctx_mem);
+	trace_gpu_mem_total(0, pid_nr(rcu_dereference(file->pid)), ctx_mem);
 	rcu_read_unlock();
 
 }
-- 
2.45.2