linux-kernel - net/sunrpc/auth_gss/gss_krb5_seal.c:144:14: error: implicit declaration of function 'cmpxchg64'; did you mean 'cmpxchg'?

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <201810300847.NmO3ZWYL%fengguang.wu@intel.com>
Date:   Tue, 30 Oct 2018 08:46:49 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org,
        Trond Myklebust <trond.myklebust@...merspace.com>
Subject: net/sunrpc/auth_gss/gss_krb5_seal.c:144:14: error: implicit
 declaration of function 'cmpxchg64'; did you mean 'cmpxchg'?

Hi Arnd,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   4b42745211af552f170f38a1b97f4a112b5da6b2
commit: 21924765862a0871908a35cb0e53e2e1c169b888 SUNRPC: use cmpxchg64() in gss_seq_send64_fetch_and_inc()
date:   3 weeks ago
config: sh-allmodconfig (attached as .config)
compiler: sh4-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 21924765862a0871908a35cb0e53e2e1c169b888
        # save the attached .config to linux build tree
        GCC_VERSION=7.2.0 make.cross ARCH=sh 

All errors (new ones prefixed by >>):

   net/sunrpc/auth_gss/gss_krb5_seal.c: In function 'gss_seq_send64_fetch_and_inc':
>> net/sunrpc/auth_gss/gss_krb5_seal.c:144:14: error: implicit declaration of function 'cmpxchg64'; did you mean 'cmpxchg'? [-Werror=implicit-function-declaration]
      seq_send = cmpxchg64(&ctx->seq_send64, old, old + 1);
                 ^~~~~~~~~
                 cmpxchg
   cc1: some warnings being treated as errors

vim +144 net/sunrpc/auth_gss/gss_krb5_seal.c

   136	
   137	u64
   138	gss_seq_send64_fetch_and_inc(struct krb5_ctx *ctx)
   139	{
   140		u64 old, seq_send = READ_ONCE(ctx->seq_send);
   141	
   142		do {
   143			old = seq_send;
 > 144			seq_send = cmpxchg64(&ctx->seq_send64, old, old + 1);
   145		} while (old != seq_send);
   146		return seq_send;
   147	}
   148	

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

Download attachment ".config.gz" of type "application/gzip" (49584 bytes)