linux-kernel - Re: [PATCH] iscsi: iscsi_target: fix clang -Wformat warning

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Date:   Fri, 8 Jul 2022 16:41:01 -0700
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     Justin Stitt <justinstitt@...gle.com>
Cc:     "Martin K . Petersen" <martin.petersen@...cle.com>,
        Nathan Chancellor <nathan@...nel.org>,
        Tom Rix <trix@...hat.com>,
        Mike Christie <michael.christie@...cle.com>,
        Max Gurtovoy <mgurtovoy@...dia.com>,
        Mingzhe Zou <mingzhe.zou@...ystack.cn>,
        linux-scsi@...r.kernel.org, target-devel@...r.kernel.org,
        linux-kernel@...r.kernel.org, llvm@...ts.linux.dev
Subject: Re: [PATCH] iscsi: iscsi_target: fix clang -Wformat warning

On Fri, Jul 8, 2022 at 3:14 PM Justin Stitt <justinstitt@...gle.com> wrote:
>
> When building with Clang we encounter this warning:
> | drivers/target/iscsi/iscsi_target.c:4365:12: error: format specifies
> | type 'unsigned short' but the argument has type 'int' [-Werror,-Wformat]
> | " %s\n", atomic_read(&sess->nconn)
>
> The format specifier used is `%hu` which describes an unsigned short.
> However, atomic_read returns an int which means the format specifier
> should be `%d`.

Thanks for the patches!

Please fold this into:
https://lore.kernel.org/llvm/20220708221314.466294-1-justinstitt@google.com/
and send a v2 of that.

>
> Link: https://github.com/ClangBuiltLinux/linux/issues/378
> Signed-off-by: Justin Stitt <justinstitt@...gle.com>
> ---
>  drivers/target/iscsi/iscsi_target.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c
> index e368f038ff5c..bfb717065344 100644
> --- a/drivers/target/iscsi/iscsi_target.c
> +++ b/drivers/target/iscsi/iscsi_target.c
> @@ -4361,7 +4361,7 @@ int iscsit_close_connection(
>
>         spin_lock_bh(&sess->conn_lock);
>         atomic_dec(&sess->nconn);
> -       pr_debug("Decremented iSCSI connection count to %hu from node:"
> +       pr_debug("Decremented iSCSI connection count to %d from node:"
>                 " %s\n", atomic_read(&sess->nconn),
>                 sess->sess_ops->InitiatorName);
>         /*
> --
> 2.37.0.rc0.161.g10f37bed90-goog
>


-- 
Thanks,
~Nick Desaulniers