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dma-buf: Document that dma-buf size is fixed 

The fact that the size of dma-buf is invariant over the lifetime of the
buffer is mentioned in the comment of 'dma_buf_ops.mmap', but is not
documented at where the info is defined. Add the missing documentation.

Signed-off-by: Jianxin Xiong <jianxin.xiong@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/1605044477-51833-7-git-send-email-jianxin.xiong@intel.com
This commit is contained in:
Jianxin Xiong 2020-11-10 13:41:17 -08:00 committed by Daniel Vetter
parent abec017c3d
commit 476b485be0
1 changed files with 2 additions and 2 deletions
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4
include/linux/dma-buf.h
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@ -273,7 +273,7 @@ struct dma_buf_ops {
/**
* struct dma_buf - shared buffer object
* @size: size of the buffer
* @size: size of the buffer; invariant over the lifetime of the buffer.
* @file: file pointer used for sharing buffers across, and for refcounting.
* @attachments: list of dma_buf_attachment that denotes all devices attached,
* protected by dma_resv lock.
@ -405,7 +405,7 @@ struct dma_buf_attachment {
* @exp_name: name of the exporter - useful for debugging.
* @owner: pointer to exporter module - used for refcounting kernel module
* @ops: Attach allocator-defined dma buf ops to the new buffer
* @size: Size of the buffer
* @size: Size of the buffer - invariant over the lifetime of the buffer
* @flags: mode flags for the file
* @resv: reservation-object, NULL to allocate default one
* @priv: Attach private data of allocator to this buffer