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2024-05-11 04dd17822334871b23ea2862f7798fb0e0007777

 kernel/drivers/gpu/drm/nouveau/nvkm/subdev/instmem/nv50.c
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@@ -288,6 +288,19 @@
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 	return nvkm_memory_addr(nv50_instobj(memory)->ram);
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 }
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+static u64
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+nv50_instobj_bar2(struct nvkm_memory *memory)
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+{
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+	struct nv50_instobj *iobj = nv50_instobj(memory);
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+	u64 addr = ~0ULL;
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+	if (nv50_instobj_acquire(&iobj->base.memory)) {
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+		iobj->lru.next = NULL; /* Exclude from eviction. */
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+		addr = iobj->bar->addr;
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+	}
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+	nv50_instobj_release(&iobj->base.memory);
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+	return addr;
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+}
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+
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 static enum nvkm_memory_target
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 nv50_instobj_target(struct nvkm_memory *memory)
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 {
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@@ -325,8 +338,9 @@
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 nv50_instobj_func = {
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 	.dtor = nv50_instobj_dtor,
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 	.target = nv50_instobj_target,
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-	.size = nv50_instobj_size,
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+	.bar2 = nv50_instobj_bar2,
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 	.addr = nv50_instobj_addr,
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+	.size = nv50_instobj_size,
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 	.boot = nv50_instobj_boot,
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 	.acquire = nv50_instobj_acquire,
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 	.release = nv50_instobj_release,