---
id: pr-flash-attention-2341
repo: Dao-AILab/flash-attention
pr: 2341
title: '[Bwd, SM80] Fix tdKrdS typo'
author: henrylhtsang
date: '2026-03-13'
url: https://github.com/Dao-AILab/flash-attention/pull/2341
source_category: upstream-code
architectures:
- sm100
tags:
- gemm
- sm80
techniques: []
hardware_features: []
kernel_types:
- attention
- gemm
languages: []
captured_at: '2026-05-16'
status: merged
merge_sha: 10846960ca0793b993446f6dbaf696479c127a9d
inclusion_reason: Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.
changed_paths:
- flash_attn/cute/flash_bwd.py
artifact_dir: evidence/pull-bundles/flash-attention/gh-2341
head_ref_oid: dfaea70de8512dafb512ff85eb4dddf470c16aad
---
# [Bwd, SM80] Fix tdKrdS typo

- Repository: `Dao-AILab/flash-attention`
- PR: [2341](https://github.com/Dao-AILab/flash-attention/pull/2341)
- Decision: `Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.`
- Reason: Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.

## Changed Paths

- `flash_attn/cute/flash_bwd.py`

## Evidence Bundle

`evidence/pull-bundles/flash-attention/gh-2341`
