linux-kernel - Re: [PATCH] Fix implicit cast warning in test_klp

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Date: Wed, 21 Feb 2024 13:44:01 +0100
From: Nicolai Stange <nstange@...e.de>
To: Shresth Prasad <shresthprasad7@...il.com>
Cc: zhangwarden@...il.com,  jikos@...nel.org,  joe.lawrence@...hat.com,
  jpoimboe@...nel.org,  linux-kernel-mentees@...ts.linuxfoundation.org,
  linux-kernel@...r.kernel.org,  linux-kselftest@...r.kernel.org,
  live-patching@...r.kernel.org,  mbenes@...e.cz,  mpdesouza@...e.com,
  pmladek@...e.com,  shuah@...nel.org,  skhan@...uxfoundation.org
Subject: Re: [PATCH]     Fix implicit cast warning in test_klp_state.c

Shresth Prasad <shresthprasad7@...il.com> writes:

> I checked the source code and yes I am on the latest Linux next repo.
>
> Here's the warning:
> /home/shresthp/dev/linux_work/linux_next/tools/testing/selftests/livepatch/test_modules/test_klp_state.c:38:24: warning: assignment to ‘struct klp_state *’ from ‘int’ makes pointer from integer without a cast [-Wint-conversion]
>    38 |         loglevel_state = klp_get_state(&patch, CONSOLE_LOGLEVEL_STATE);
>       |                        ^


Is the declaration of klp_get_state() visible at that point, i.e. is
there perhaps any warning about missing declarations above that?

Otherwise C rules would default to assume an 'int' return type.

Thanks,

Nicolai

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