Add deprecation warning for torch.backends.cuda.sdp_kernel (#43)

* only deprecation warning

* typo

* move to correct section in readme

README.md

@@ -103,5 +103,12 @@ Migration guide:
     `torch.nn.utils.parametrize.cached` before invoking the module
     in question.
 
+#### torch.backends.cuda.sdp_kernel
+
+This function is deprecated. Use the `torch.nn.attention.sdpa_kernel` context manager instead.
+
+Migration guide:
+Each boolean input parameter (defaulting to true unless specified) of `sdp_kernel` corresponds to a `SDPBackened`. If the input parameter is true, the corresponding backend should be added to the input list of `sdpa_kernel`.
+
 ## License
 TorchFix is BSD License licensed, as found in the LICENSE file.

tests/fixtures/deprecated_symbols/checker/sdp_kernel.py

@@ -0,0 +1,12 @@
+import torch
+from torch.backends import cuda
+from torch.backends.cuda import sdp_kernel
+
+with torch.backends.cuda.sdp_kernel() as context:
+    pass
+
+with cuda.sdp_kernel() as context:
+    pass
+
+with sdp_kernel() as context:
+    pass

tests/fixtures/deprecated_symbols/checker/sdp_kernel.txt

@@ -0,0 +1,4 @@
+3:1 TOR103 Import of deprecated function torch.backends.cuda.sdp_kernel: https://github.com/pytorch-labs/torchfix#torchbackendscudasdp_kernel
+5:6 TOR101 Use of deprecated function torch.backends.cuda.sdp_kernel: https://github.com/pytorch-labs/torchfix#torchbackendscudasdp_kernel
+8:6 TOR101 Use of deprecated function torch.backends.cuda.sdp_kernel: https://github.com/pytorch-labs/torchfix#torchbackendscudasdp_kernel
+11:6 TOR101 Use of deprecated function torch.backends.cuda.sdp_kernel: https://github.com/pytorch-labs/torchfix#torchbackendscudasdp_kernel

torchfix/deprecated_symbols.yaml

@@ -65,6 +65,11 @@
   remove_pr:
   reference: https://github.com/pytorch-labs/torchfix#torchnnutilsweight_norm
 
+- name: torch.backends.cuda.sdp_kernel
+  deprecate_pr: https://github.com/pytorch/pytorch/pull/114689
+  remove_pr:
+  reference: https://github.com/pytorch-labs/torchfix#torchbackendscudasdp_kernel
+
 # functorch
 - name: functorch.vmap
   deprecate_pr: TBA