Commit 476b485b authored by Jianxin Xiong's avatar Jianxin Xiong Committed by Daniel Vetter
Browse files

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: default avatarJianxin Xiong <jianxin.xiong@intel.com>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/1605044477-51833-7-git-send-email-jianxin.xiong@intel.com
parent abec017c

include/linux/dma-buf.h

+2 −2
Original line number Diff line number Diff line
@@ -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

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