linux-kernel - Re: [rostedt-trace:ftrace/core 2/2] kernel/trace/pid_list.c:439:6: warning: Branch condition evaluates to a garbage value [clang-analyzer-core.uninitialized.Branch]

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Date:   Mon, 11 Oct 2021 11:52:43 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     kernel test robot <yujie.liu@...el.com>
Cc:     <llvm@...ts.linux.dev>, <kbuild-all@...ts.01.org>,
        "Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>
Subject: Re: [rostedt-trace:ftrace/core 2/2] kernel/trace/pid_list.c:439:6:
 warning: Branch condition evaluates to a garbage value
 [clang-analyzer-core.uninitialized.Branch]

On Sun, 10 Oct 2021 17:46:20 +0800
kernel test robot <yujie.liu@...el.com> wrote:

> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git ftrace/core
> head:   c8d01c02b46e599b057d7d24d1342ae9fcf828c2
> commit: c8d01c02b46e599b057d7d24d1342ae9fcf828c2 [2/2] tracing: Create a sparse bitmask for pid filtering
> config: riscv-randconfig-c006-20210927 (attached as .config)
> compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project dc6e8dfdfe7efecfda318d43a06fae18b40eb498)
> reproduce (this is a W=1 build):
>          wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>          chmod +x ~/bin/make.cross
>          # install riscv cross compiling tool for clang build
>          # apt-get install binutils-riscv64-linux-gnu
>          # https://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git/commit/?id=c8d01c02b46e599b057d7d24d1342ae9fcf828c2
>          git remote add rostedt-trace https://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git
>          git fetch --no-tags rostedt-trace ftrace/core
>          git checkout c8d01c02b46e599b057d7d24d1342ae9fcf828c2
>          # save the attached .config to linux build tree
>          COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv clang-analyzer
> 
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@...el.com>


Thanks, this was already reported.

  https://lore.kernel.org/all/221bc7ba-a475-1cb9-1bbe-730bb9c2d448@canonical.com/

-- Steve