linux-kernel - Re: arch/arc/kernel/setup.c:203 arcv2_mumbojumbo() error: uninitialized symbol 'release'.

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Message-ID: <b78607e5-6965-4e7f-b43a-c1ca58eecf89@kernel.org>
Date:   Fri, 8 Dec 2023 16:33:44 -0800
From:   Vineet Gupta <vgupta@...nel.org>
To:     Dan Carpenter <dan.carpenter@...aro.org>,
        oe-kbuild@...ts.linux.dev, Vineet Gupta <vgupta@...nel.org>
Cc:     lkp@...el.com, oe-kbuild-all@...ts.linux.dev,
        linux-kernel@...r.kernel.org, linux-snps-arc@...ts.infradead.org
Subject: Re: arch/arc/kernel/setup.c:203 arcv2_mumbojumbo() error:
 uninitialized symbol 'release'.

On 11/27/23 22:22, Dan Carpenter wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   2cc14f52aeb78ce3f29677c2de1f06c0e91471ab
> commit: fad84e39f116035ae8d550c6020107b8ac113b45 ARC: boot log: eliminate struct cpuinfo_arc #4: boot log per ISA
> config: arc-randconfig-r071-20231128 (https://download.01.org/0day-ci/archive/20231128/202311280906.VAIwEAfT-lkp@intel.com/config)
> compiler: arceb-elf-gcc (GCC) 13.2.0
> reproduce: (https://download.01.org/0day-ci/archive/20231128/202311280906.VAIwEAfT-lkp@intel.com/reproduce)
>
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <lkp@...el.com>
> | Reported-by: Dan Carpenter <error27@...il.com>
> | Closes: https://lore.kernel.org/r/202311280906.VAIwEAfT-lkp@intel.com/
>
> New smatch warnings:
> arch/arc/kernel/setup.c:203 arcv2_mumbojumbo() error: uninitialized symbol 'release'.

Thx, I've posted a fix.

> Old smatch warnings:
> arch/arc/include/asm/thread_info.h:62 current_thread_info() error: uninitialized symbol 'sp'.

This seems like a false warning. Its a register variable and thus can't
possibly be initialized.

static inline __attribute_const__ struct thread_info
*current_thread_info(void)
{
    register unsigned long sp asm("sp");
    return (struct thread_info *)(sp & ~(THREAD_SIZE - 1));
}