---
id: pr-vllm-20141
repo: vllm-project/vllm
pr: 20141
title: '[Bugfix] Fix some narrowing conversion warnings'
author: tlrmchlsmth
date: '2025-06-27'
url: https://github.com/vllm-project/vllm/pull/20141
source_category: upstream-code
architectures:
- sm100
tags:
- attention
- fp4
- mla
- nvfp4
- quantization
techniques: []
hardware_features:
- fp4
- nvfp4
kernel_types:
- attention
- mla
- quantization
languages:
- cuda-cpp
captured_at: '2026-04-27'
status: merged
merge_sha: e8c3bd2cd164786e764f7e3436bbaa6cd00ae64a
inclusion_reason: kernel file changes
changed_paths:
- csrc/attention/mla/cutlass_mla_kernels.cu
- csrc/mamba/causal_conv1d/causal_conv1d.cu
- csrc/mamba/mamba_ssm/selective_scan_fwd.cu
- csrc/quantization/fp4/nvfp4_experts_quant.cu
- csrc/quantization/fp4/nvfp4_quant_kernels.cu
- csrc/quantization/fp4/nvfp4_scaled_mm_kernels.cu
head_ref_oid: 01498f2bda29198064e28d0ead5763240dbfd4ef
artifact_dir: evidence/pull-bundles/vllm/gh-20141
---
# [Bugfix] Fix some narrowing conversion warnings

- Repository: `vllm-project/vllm`
- PR: [20141](https://github.com/vllm-project/vllm/pull/20141)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `csrc/attention/mla/cutlass_mla_kernels.cu`
- `csrc/mamba/causal_conv1d/causal_conv1d.cu`
- `csrc/mamba/mamba_ssm/selective_scan_fwd.cu`
- `csrc/quantization/fp4/nvfp4_experts_quant.cu`
- `csrc/quantization/fp4/nvfp4_quant_kernels.cu`
- `csrc/quantization/fp4/nvfp4_scaled_mm_kernels.cu`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-20141`
