On Mon, Mar 19, 2012 at 04:41:55PM +0100, Daniel Vetter wrote: > Otherwise subsystems will get this wrong and end up with a second > export ioctl with the flag and O_CLOEXEC support added. > > v2: Fixup the function name and caution exporters to limit the flags > to only O_CLOEXEC. Noted by Dave Airlie. > > Cc: Dave Airlie <airlied@xxxxxxxxx> > Signed-Off-by: Daniel Vetter <daniel.vetter@xxxxxxxx> > --- > Documentation/dma-buf-sharing.txt | 6 ++++++ > 1 files changed, 6 insertions(+), 0 deletions(-) > > diff --git a/Documentation/dma-buf-sharing.txt b/Documentation/dma-buf-sharing.txt > index 9f3aeef..a6d4c37 100644 > --- a/Documentation/dma-buf-sharing.txt > +++ b/Documentation/dma-buf-sharing.txt > @@ -319,6 +319,12 @@ Miscellaneous notes > - Any exporters or users of the dma-buf buffer sharing framework must have > a 'select DMA_SHARED_BUFFER' in their respective Kconfigs. > > +- To avoid the wrath of userspace library writers exporting subsystems must have > + a flag parameter in the ioctl that creates the dma-buf fd which needs to > + support at least the O_CLOEXEC fd flag. This needs to be passed in the flag > + parameter of dma_buf_fd. Without any other reasons applying it is recommended > + that exporters limit the flags passed to dma_buf_fd to only O_CLOEXEC. Difficult to parse. Needs more punctuation. -- Ville Syrjälä Intel OTC -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
