how to add noise on adjustment layer?

A second choice is make your layer a Smart Object. One way is Filter > Convert for Smart Filters > OK.

Then put a Filter on the Layer, in this case Noise. Note that in the first image below, the layer is selected. In the second image, the mask that was created automatically is selected. It's important that you select the mask.

Notice that the mask is white, and that the Filter, in this case Noise, is showing across the entire layer.

• Select the mask

* Select the Brush tool > choose a size

• Select a foreground color. Choose Black or White, but not the color you have. In other words, select Black.

• Paint the image to paint out the noise.

This is non-destructive editing, as you can paint with white or black (gray will partially reveal), and the filter can be deleted. You can double-click the word "Noise" in the Layers panel to change the amount or type of noise.

You can also get fancy and apply a B-W gradient on the mask.

And if one creates a Pattern of the Noise on 50% Gray one can use it as a Pattern Layer or a Pattern Overlay.