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author | Thomas Gleixner <tglx@linutronix.de> | 2013-05-05 08:24:42 +0200 |
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committer | Thomas Gleixner <tglx@linutronix.de> | 2013-05-05 08:27:03 +0200 |
commit | f99e44a7f3352d7131c7526207f153f13ec5acd4 (patch) | |
tree | 0f448b21128c478053ee7f7765b865954c4eebe8 /Documentation/dma-buf-sharing.txt | |
parent | fd29f424d458118f02e89596505c68a63dcb3007 (diff) | |
parent | ce857229e0c3adc211944a13a5579ef84fd7b4af (diff) | |
download | blackbird-op-linux-f99e44a7f3352d7131c7526207f153f13ec5acd4.tar.gz blackbird-op-linux-f99e44a7f3352d7131c7526207f153f13ec5acd4.zip |
Merge branch 'linus' into core/urgent
Update with Linus tree so fixes for the same can be applied.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'Documentation/dma-buf-sharing.txt')
-rw-r--r-- | Documentation/dma-buf-sharing.txt | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/Documentation/dma-buf-sharing.txt b/Documentation/dma-buf-sharing.txt index 4966b1be42ac..0b23261561d2 100644 --- a/Documentation/dma-buf-sharing.txt +++ b/Documentation/dma-buf-sharing.txt @@ -52,14 +52,23 @@ The dma_buf buffer sharing API usage contains the following steps: associated with this buffer. Interface: - struct dma_buf *dma_buf_export(void *priv, struct dma_buf_ops *ops, - size_t size, int flags) + struct dma_buf *dma_buf_export_named(void *priv, struct dma_buf_ops *ops, + size_t size, int flags, + const char *exp_name) If this succeeds, dma_buf_export allocates a dma_buf structure, and returns a pointer to the same. It also associates an anonymous file with this buffer, so it can be exported. On failure to allocate the dma_buf object, it returns NULL. + 'exp_name' is the name of exporter - to facilitate information while + debugging. + + Exporting modules which do not wish to provide any specific name may use the + helper define 'dma_buf_export()', with the same arguments as above, but + without the last argument; a __FILE__ pre-processor directive will be + inserted in place of 'exp_name' instead. + 2. Userspace gets a handle to pass around to potential buffer-users Userspace entity requests for a file-descriptor (fd) which is a handle to the |