|  | /* SPDX-License-Identifier: GPL-2.0-only */ | 
|  | /* | 
|  | * DMA-BUF sysfs statistics. | 
|  | * | 
|  | * Copyright (C) 2021 Google LLC. | 
|  | */ | 
|  |  | 
|  | #ifndef _DMA_BUF_SYSFS_STATS_H | 
|  | #define _DMA_BUF_SYSFS_STATS_H | 
|  |  | 
|  | #ifdef CONFIG_DMABUF_SYSFS_STATS | 
|  |  | 
|  | int dma_buf_init_sysfs_statistics(void); | 
|  | void dma_buf_uninit_sysfs_statistics(void); | 
|  |  | 
|  | int dma_buf_stats_setup(struct dma_buf *dmabuf, struct file *file); | 
|  |  | 
|  | void dma_buf_stats_teardown(struct dma_buf *dmabuf); | 
|  | #else | 
|  |  | 
|  | static inline int dma_buf_init_sysfs_statistics(void) | 
|  | { | 
|  | return 0; | 
|  | } | 
|  |  | 
|  | static inline void dma_buf_uninit_sysfs_statistics(void) {} | 
|  |  | 
|  | static inline int dma_buf_stats_setup(struct dma_buf *dmabuf, struct file *file) | 
|  | { | 
|  | return 0; | 
|  | } | 
|  |  | 
|  | static inline void dma_buf_stats_teardown(struct dma_buf *dmabuf) {} | 
|  | #endif | 
|  | #endif // _DMA_BUF_SYSFS_STATS_H |