Hridya Valsaraju
a1ce719ca7
The overhead of sysfs directory creation/teardown during
dma_buf_attach()/dma_buf_detach() is causing perf regressions for
certain drivers.
Bug: 192621117
Change-Id: I908aa3b2717bf2e183628be3446e0069ce24c68a
Fixes: 621f94a601 (BACKPORT: FROMLIST: dmabuf: Add the capability to
expose DMA-BUF stats in sysfs)
Signed-off-by: Hridya Valsaraju <hridya@google.com>
36 lines
729 B
C
36 lines
729 B
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* DMA-BUF sysfs statistics.
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*
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* Copyright (C) 2021 Google LLC.
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*/
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#ifndef _DMA_BUF_SYSFS_STATS_H
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#define _DMA_BUF_SYSFS_STATS_H
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#ifdef CONFIG_DMABUF_SYSFS_STATS
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int dma_buf_init_sysfs_statistics(void);
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void dma_buf_uninit_sysfs_statistics(void);
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int dma_buf_stats_setup(struct dma_buf *dmabuf);
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void dma_buf_stats_teardown(struct dma_buf *dmabuf);
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#else
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static inline int dma_buf_init_sysfs_statistics(void)
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{
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return 0;
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}
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static inline void dma_buf_uninit_sysfs_statistics(void) {}
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static inline int dma_buf_stats_setup(struct dma_buf *dmabuf)
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{
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return 0;
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}
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static inline void dma_buf_stats_teardown(struct dma_buf *dmabuf) {}
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#endif
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#endif // _DMA_BUF_SYSFS_STATS_H
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