Thread (25 messages) 25 messages, 9 authors, 2020-11-10

Re: [PATCH net-next 01/11] atm: horizon: shut up clang null pointer arithmetic warning

From: Arnd Bergmann <arnd@kernel.org>
Date: 2020-10-28 22:23:15
Also in: lkml

On Wed, Oct 28, 2020 at 1:42 AM Jakub Kicinski [off-list ref] wrote:
On Mon, 26 Oct 2020 22:29:48 +0100 Arnd Bergmann wrote:
quoted
From: Arnd Bergmann <arnd@arndb.de>

Building a "W=1" kernel with clang produces a warning about
suspicous pointer arithmetic:

drivers/atm/horizon.c:1844:52: warning: performing pointer arithmetic
on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
  for (mem = (HDW *) memmap; mem < (HDW *) (memmap + 1); ++mem)

The way that the addresses are handled is very obscure, and
rewriting it to be more conventional seems fairly pointless, given
that this driver probably has no users.
Shut up this warning by adding a cast to uintptr_t.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Hi!

I'm not sure what your plan is for re-spinning but when you do could
you please split the wireless changes out?
Sure, will do. The easiest for me would be if you just merge the ones
that have been acked or that look obvious enough for you, and I'll
then resend whatever is left after addressing the review comments.

If that causes you extra work, I'll just send everything that should go
through your tree.
Also we never got patch 3
IDK if that's a coincidence or if it wasn't for networking...
Yes, that one slipped in when I was sorting my longer series, it
was a block driver change.

      Arnd
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