From: Christopher James Halse Rogers <christopher.halse.rogers@canonical.com>
Date: Tue, 10 Sep 2013 06:06:45 +0000 (+0530)
Subject: dma-buf: Expose buffer size to userspace (v2)
X-Git-Tag: v3.12-rc1~51^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=19e8697ba45e7bcdb04f2adf6110fbf4882863e5;p=pandora-kernel.git

dma-buf: Expose buffer size to userspace (v2)

Each dma-buf has an associated size and it's reasonable for userspace
to want to know what it is.

Since userspace already has an fd, expose the size using the
size = lseek(fd, SEEK_END, 0); lseek(fd, SEEK_CUR, 0);
idiom.

v2: Added Daniel's sugeested documentation, with minor fixups

Signed-off-by: Christopher James Halse Rogers <christopher.halse.rogers@canonical.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Tested-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org>
---

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