Messages in this thread |  | | Date | Thu, 10 Sep 2015 13:26:20 -0700 | Subject | Re: [PATCH] mmc: block: Add new ioctl to send multi commands | From | Grant Grundler <> |
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On Thu, Sep 10, 2015 at 11:20 AM, Jon Hunter <jonathanh@nvidia.com> wrote: > > On 10/09/15 18:10, Grant Grundler wrote: ... >>>>>> struct mmc_ioc_multi_cmd { >>>>>> __u64 num_of_cmds; >>>>>> struct mmc_ioc_cmd cmds[0]; >>>>>> }; >> >> I think this would work just as well. But doesn't "pointer to an >> array" require 32-bit ioctl compat handling? >> We were trying to avoid a 32-bit user space compatibility handler. > > I think that this is fine as it is a zero length array [0] and not a > pointer.
Doh, yes. Thanks for correcting. I knew this was a gcc special but forgot it's not actually allocating any space.
cheers, grant
> > Cheers > Jon > > [0] https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
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