---
id: pr-flash-attention-1904
repo: Dao-AILab/flash-attention
pr: 1904
title: C++11 fix warnings
author: johnnynunez
date: '2025-09-25'
url: https://github.com/Dao-AILab/flash-attention/pull/1904
source_category: upstream-code
architectures:
- sm90
tags:
- cuda kernel
- hopper
techniques: []
hardware_features:
- hopper
kernel_types:
- attention
languages:
- cuda-cpp
captured_at: '2026-05-16'
status: merged
merge_sha: add175637c5d54b74bc25372e49ce282d6f236fc
inclusion_reason: Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.
changed_paths:
- csrc/cutlass
- hopper/flash_api.cpp
- hopper/flash_api_stable.cpp
artifact_dir: evidence/pull-bundles/flash-attention/gh-1904
head_ref_oid: 2eff3f754ab3c3aa496aabf4443d557f23a18adf
---
# C++11 fix warnings

- Repository: `Dao-AILab/flash-attention`
- PR: [1904](https://github.com/Dao-AILab/flash-attention/pull/1904)
- 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

- `csrc/cutlass`
- `hopper/flash_api.cpp`
- `hopper/flash_api_stable.cpp`

## Evidence Bundle

`evidence/pull-bundles/flash-attention/gh-1904`
