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From:   Naresh Kamboju <naresh.kamboju@linaro.org>
Date:   Tue, 25 Jul 2023 18:35:34 +0530
Message-ID: <CA+G9fYt=6ysz636XcQ=-KJp7vJcMZ=NjbQBrn77v7vnTcfP2cA@mail.gmail.com>
Subject: selftests: connector: proc_filter.c:48:20: error: invalid application
 of 'sizeof' to an incomplete type 'struct proc_input'
To:     "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@vger.kernel.org>,
        open list <linux-kernel@vger.kernel.org>,
        lkft-triage@lists.linaro.org, Netdev <netdev@vger.kernel.org>,
        clang-built-linux <llvm@lists.linux.dev>
Cc:     Anjali Kulkarni <anjali.k.kulkarni@oracle.com>,
        Shuah Khan <shuah@kernel.org>,
        Anders Roxell <anders.roxell@linaro.org>,
        "David S. Miller" <davem@davemloft.net>,
        "Liam R. Howlett" <Liam.Howlett@oracle.com>
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Precedence: bulk

selftests: connector: proc_filter build failed with clang-16 due to below
warnings / errors on Linux next-20230725.

Reported-by: Linux Kernel Functional Testing <lkft@linaro.org>

clang --target=aarch64-linux-gnu -fintegrated-as
-Werror=unknown-warning-option -Werror=ignored-optimization-argument
-Werror=option-ignored -Werror=unused-command-line-argument
--target=aarch64-linux-gnu -fintegrated-as -Wall     proc_filter.c  -o
/home/tuxbuild/.cache/tuxmake/builds/1/build/kselftest/connector/proc_filter
proc_filter.c:42:12: error: invalid application of 'sizeof' to an
incomplete type 'struct proc_input'
        char buff[NL_MESSAGE_SIZE];
                  ^~~~~~~~~~~~~~~
proc_filter.c:22:5: note: expanded from macro 'NL_MESSAGE_SIZE'
                         sizeof(struct proc_input))
                         ^     ~~~~~~~~~~~~~~~~~~~
proc_filter.c:42:12: note: forward declaration of 'struct proc_input'
proc_filter.c:22:19: note: expanded from macro 'NL_MESSAGE_SIZE'
                         sizeof(struct proc_input))
                                       ^
proc_filter.c:48:20: error: invalid application of 'sizeof' to an
incomplete type 'struct proc_input'
                hdr->nlmsg_len = NL_MESSAGE_SIZE;
                                 ^~~~~~~~~~~~~~~
proc_filter.c:22:5: note: expanded from macro 'NL_MESSAGE_SIZE'
                         sizeof(struct proc_input))
                         ^     ~~~~~~~~~~~~~~~~~~~
proc_filter.c:42:12: note: forward declaration of 'struct proc_input'
        char buff[NL_MESSAGE_SIZE];
                  ^
proc_filter.c:22:19: note: expanded from macro 'NL_MESSAGE_SIZE'
                         sizeof(struct proc_input))
                                       ^
proc_filter.c:64:14: error: invalid application of 'sizeof' to an
incomplete type 'struct proc_input'
                msg->len = sizeof(struct proc_input);
                           ^     ~~~~~~~~~~~~~~~~~~~
proc_filter.c:42:12: note: forward declaration of 'struct proc_input'
        char buff[NL_MESSAGE_SIZE];
                  ^
proc_filter.c:22:19: note: expanded from macro 'NL_MESSAGE_SIZE'
                         sizeof(struct proc_input))
                                       ^
proc_filter.c:65:35: error: incomplete definition of type 'struct proc_input'
                ((struct proc_input *)msg->data)->mcast_op =
                ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^
proc_filter.c:42:12: note: forward declaration of 'struct proc_input'
        char buff[NL_MESSAGE_SIZE];
                  ^
proc_filter.c:22:19: note: expanded from macro 'NL_MESSAGE_SIZE'
                         sizeof(struct proc_input))
                                       ^
proc_filter.c:66:31: error: incomplete definition of type 'struct proc_input'
                        ((struct proc_input *)pinp)->mcast_op;
                        ~~~~~~~~~~~~~~~~~~~~~~~~~~~^
proc_filter.c:42:12: note: forward declaration of 'struct proc_input'
        char buff[NL_MESSAGE_SIZE];
                  ^
proc_filter.c:22:19: note: expanded from macro 'NL_MESSAGE_SIZE'
                         sizeof(struct proc_input))
                                       ^
proc_filter.c:67:35: error: incomplete definition of type 'struct proc_input'
                ((struct proc_input *)msg->data)->event_type =
                ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^
proc_filter.c:42:12: note: forward declaration of 'struct proc_input'
        char buff[NL_MESSAGE_SIZE];
                  ^
proc_filter.c:22:19: note: expanded from macro 'NL_MESSAGE_SIZE'
                         sizeof(struct proc_input))
                                       ^
proc_filter.c:68:31: error: incomplete definition of type 'struct proc_input'
                        ((struct proc_input *)pinp)->event_type;
                        ~~~~~~~~~~~~~~~~~~~~~~~~~~~^
proc_filter.c:42:12: note: forward declaration of 'struct proc_input'
        char buff[NL_MESSAGE_SIZE];
                  ^
proc_filter.c:22:19: note: expanded from macro 'NL_MESSAGE_SIZE'
                         sizeof(struct proc_input))
                                       ^
proc_filter.c:245:20: error: variable has incomplete type 'struct proc_input'
        struct proc_input input;
                          ^
proc_filter.c:245:9: note: forward declaration of 'struct proc_input'
        struct proc_input input;
               ^
proc_filter.c:264:22: error: use of undeclared identifier
'PROC_EVENT_NONZERO_EXIT'
                input.event_type = PROC_EVENT_NONZERO_EXIT;
                                   ^
9 errors generated.
make[4]: Leaving directory '/builds/linux/tools/testing/selftests/connector'


Links:
 - https://storage.tuxsuite.com/public/linaro/lkft/builds/2T3676HpK243gMBLYJCp4OXDmWl/

steps to reproduce:
 - https://storage.tuxsuite.com/public/linaro/lkft/builds/2T3676HpK243gMBLYJCp4OXDmWl/tuxmake_reproducer.sh
--
Linaro LKFT
https://lkft.linaro.org