Re: [PATCH] selftests: Open /dev/udmabuf O_RDONLY

[Jakub Kicinski]

On Thu, 25 Jun 2026 11:15:55 -0700 T.J. Mercier wrote:
> Write permissions on the /dev/udmabuf device file are not required to
> issue ioctls and allocate udmabufs. Applications should be opening this
> file as O_RDONLY. The BPF dmabuf_iter selftest already does this. [1]
> 
> Remove the write access mode from the drivers/dma-buf/udmabuf.c and
> drivers/net/hw/ncdevmem.c selftests.

You need to explain "why", too. Why change it if it clearly
worked for everyone running this test until now.
-- 
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