Hi Frank, [auto build test WARNING on nfs/linux-next] [also build test WARNING on v4.8-rc6 next-20160916] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] [Suggest to use git(>=2.9.0) format-patch --base=<commit> (or --base=auto for convenience) to record what (public, well-known) commit your patch series was built on] [Check https://git-scm.com/docs/git-format-patch for more information] url: https://github.com/0day-ci/linux/commits/Frank-Sorenson/sunrpc-include-gid-in-the-rpc_cred_cache-hash/20160917-042716 base: git://git.linux-nfs.org/projects/trondmy/linux-nfs.git linux-next config: microblaze-mmu_defconfig (attached as .config) compiler: microblaze-linux-gcc (GCC) 6.2.0 reproduce: wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree make.cross ARCH=microblaze All warnings (new ones prefixed by >>): net/sunrpc/auth.c: In function 'rpcauth_hash_acred': >> net/sunrpc/auth.c:545:41: warning: left shift count >= width of type [-Wshift-count-overflow] (from_kuid(&init_user_ns, acred->uid) << (sizeof(gid_t) * 8)), ^~ vim +545 net/sunrpc/auth.c 529 unsigned long diff; 530 unsigned int nr_to_scan; 531 532 if (number_cred_unused <= auth_max_cred_cachesize) 533 return; 534 diff = number_cred_unused - auth_max_cred_cachesize; 535 nr_to_scan = 100; 536 if (diff < nr_to_scan) 537 nr_to_scan = diff; 538 rpcauth_cache_do_shrink(nr_to_scan); 539 } 540 541 static unsigned int 542 rpcauth_hash_acred(struct auth_cred *acred, unsigned int hashbits) 543 { 544 return hash_64(from_kgid(&init_user_ns, acred->gid) | > 545 (from_kuid(&init_user_ns, acred->uid) << (sizeof(gid_t) * 8)), 546 hashbits); 547 } 548 549 /* 550 * Look up a process' credentials in the authentication cache 551 */ 552 struct rpc_cred * 553 rpcauth_lookup_credcache(struct rpc_auth *auth, struct auth_cred * acred, --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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