linux-kernel - mainline build failure for arm64 allmodconfig with clang

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Message-ID: <YvSxeDkmwxcJL+Z0@debian>
Date:   Thu, 11 Aug 2022 08:36:24 +0100
From:   "Sudip Mukherjee (Codethink)" <sudipm.mukherjee@...il.com>
To:     Masahiro Yamada <masahiroy@...nel.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        Nick Desaulniers <ndesaulniers@...gle.com>
Cc:     linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org,
        torvalds@...ux-foundation.org,
        Nathan Chancellor <nathan@...nel.org>,
        clang-built-linux <llvm@...ts.linux.dev>
Subject: mainline build failure for arm64 allmodconfig with clang

Hi All,

The latest mainline kernel branch fails to build for arm64 allmodconfig
with clang. The errors are:

sound/soc/sof/ipc3-topology.c:2343:4: error: format specifies type 'unsigned char' but the argument has type 'int' [-Werror,-Wformat]
                 SOF_ABI_MAJOR, SOF_ABI_MINOR, SOF_ABI_PATCH);
                 ^~~~~~~~~~~~~
./include/linux/dev_printk.h:150:67: note: expanded from macro 'dev_info'
        dev_printk_index_wrap(_dev_info, KERN_INFO, dev, dev_fmt(fmt), ##__VA_ARGS__)
                                                                 ~~~     ^~~~~~~~~~~
./include/linux/dev_printk.h:110:23: note: expanded from macro 'dev_printk_index_wrap'
                _p_func(dev, fmt, ##__VA_ARGS__);                       \
                             ~~~    ^~~~~~~~~~~
./include/uapi/sound/sof/abi.h:30:23: note: expanded from macro 'SOF_ABI_MAJOR'
#define SOF_ABI_MAJOR 3
                      ^
sound/soc/sof/ipc3-topology.c:2343:19: error: format specifies type 'unsigned char' but the argument has type 'int' [-Werror,-Wformat]
                 SOF_ABI_MAJOR, SOF_ABI_MINOR, SOF_ABI_PATCH);
                                ^~~~~~~~~~~~~
./include/linux/dev_printk.h:150:67: note: expanded from macro 'dev_info'
        dev_printk_index_wrap(_dev_info, KERN_INFO, dev, dev_fmt(fmt), ##__VA_ARGS__)
                                                                 ~~~     ^~~~~~~~~~~
./include/linux/dev_printk.h:110:23: note: expanded from macro 'dev_printk_index_wrap'
                _p_func(dev, fmt, ##__VA_ARGS__);                       \
                             ~~~    ^~~~~~~~~~~
./include/uapi/sound/sof/abi.h:31:23: note: expanded from macro 'SOF_ABI_MINOR'
#define SOF_ABI_MINOR 23
                      ^~
sound/soc/sof/ipc3-topology.c:2343:34: error: format specifies type 'unsigned char' but the argument has type 'int' [-Werror,-Wformat]
                 SOF_ABI_MAJOR, SOF_ABI_MINOR, SOF_ABI_PATCH);
                                               ^~~~~~~~~~~~~
./include/linux/dev_printk.h:150:67: note: expanded from macro 'dev_info'
        dev_printk_index_wrap(_dev_info, KERN_INFO, dev, dev_fmt(fmt), ##__VA_ARGS__)
                                                                 ~~~     ^~~~~~~~~~~
./include/linux/dev_printk.h:110:23: note: expanded from macro 'dev_printk_index_wrap'
                _p_func(dev, fmt, ##__VA_ARGS__);                       \
                             ~~~    ^~~~~~~~~~~
./include/uapi/sound/sof/abi.h:32:23: note: expanded from macro 'SOF_ABI_PATCH'
#define SOF_ABI_PATCH 0
                      ^
3 errors generated.

drivers/ntb/hw/idt/ntb_hw_idt.c:2409:28: error: format specifies type 'unsigned char' but the argument has type 'int' [-Werror,-Wformat]
                                "\t%hhu-%hhu.\t", idx, idx + cnt - 1);
                                        ~~~~           ^~~~~~~~~~~~~
                                        %d
drivers/ntb/hw/idt/ntb_hw_idt.c:2438:29: error: format specifies type 'unsigned char' but the argument has type 'int' [-Werror,-Wformat]
                                        "\t%hhu-%hhu.\t", idx, idx + cnt - 1);
                                                ~~~~           ^~~~~~~~~~~~~
                                                %d
drivers/ntb/hw/idt/ntb_hw_idt.c:2484:15: error: format specifies type 'unsigned char' but the argument has type 'int' [-Werror,-Wformat]
                        idx, data, src, ndev->peers[src].port);
                                   ^~~
3 errors generated.

For both, git bisect points to 0af5cb349a2c ("Merge tag 'kbuild-v5.20' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild")

The last good build for arm64 clang was with e394ff83bbca ("Merge tag 'nfsd-6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux")

I will be happy to test any patch or provide any extra log if needed.


--
Regards
Sudip