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Message-ID: <202502260536.BzRJ7jGr-lkp@intel.com>
Date: Wed, 26 Feb 2025 05:25:54 +0800
From: kernel test robot <lkp@...el.com>
To: Florian Westphal <fw@...len.de>, netdev@...r.kernel.org
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
steffen.klassert@...unet.com, herbert@...dor.apana.org.au,
Florian Westphal <fw@...len.de>
Subject: Re: [PATCH ipsec-next] xfrm: remove hash table alloc/free helpers
Hi Florian,
kernel test robot noticed the following build warnings:
[auto build test WARNING on klassert-ipsec-next/master]
[also build test WARNING on klassert-ipsec/master net/main net-next/main linus/master v6.14-rc4 next-20250225]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Florian-Westphal/xfrm-remove-hash-table-alloc-free-helpers/20250225-011758
base: https://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next.git master
patch link: https://lore.kernel.org/r/20250224171055.15951-1-fw%40strlen.de
patch subject: [PATCH ipsec-next] xfrm: remove hash table alloc/free helpers
config: x86_64-buildonly-randconfig-004-20250226 (https://download.01.org/0day-ci/archive/20250226/202502260536.BzRJ7jGr-lkp@intel.com/config)
compiler: clang version 19.1.7 (https://github.com/llvm/llvm-project cd708029e0b2869e80abe31ddb175f7c35361f90)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250226/202502260536.BzRJ7jGr-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202502260536.BzRJ7jGr-lkp@intel.com/
All warnings (new ones prefixed by >>):
>> net/xfrm/xfrm_state.c:165:26: warning: variable 'ohashmask' set but not used [-Wunused-but-set-variable]
165 | unsigned int nhashmask, ohashmask;
| ^
1 warning generated.
vim +/ohashmask +165 net/xfrm/xfrm_state.c
f034b5d4efdfe0 David S. Miller 2006-08-24 160
63082733858502 Alexey Dobriyan 2008-11-25 161 static void xfrm_hash_resize(struct work_struct *work)
f034b5d4efdfe0 David S. Miller 2006-08-24 162 {
63082733858502 Alexey Dobriyan 2008-11-25 163 struct net *net = container_of(work, struct net, xfrm.state_hash_work);
fe9f1d8779cb47 Sabrina Dubroca 2021-04-25 164 struct hlist_head *ndst, *nsrc, *nspi, *nseq, *odst, *osrc, *ospi, *oseq;
f034b5d4efdfe0 David S. Miller 2006-08-24 @165 unsigned int nhashmask, ohashmask;
ef6562fb0dcb1a Florian Westphal 2025-02-24 166 unsigned long nsize;
f034b5d4efdfe0 David S. Miller 2006-08-24 167 int i;
f034b5d4efdfe0 David S. Miller 2006-08-24 168
63082733858502 Alexey Dobriyan 2008-11-25 169 nsize = xfrm_hash_new_size(net->xfrm.state_hmask);
44e36b42a8378b David S. Miller 2006-08-24 170 ndst = xfrm_hash_alloc(nsize);
f034b5d4efdfe0 David S. Miller 2006-08-24 171 if (!ndst)
0244790c8ad240 Ying Xue 2014-08-29 172 return;
44e36b42a8378b David S. Miller 2006-08-24 173 nsrc = xfrm_hash_alloc(nsize);
f034b5d4efdfe0 David S. Miller 2006-08-24 174 if (!nsrc) {
ef6562fb0dcb1a Florian Westphal 2025-02-24 175 xfrm_hash_free(ndst);
0244790c8ad240 Ying Xue 2014-08-29 176 return;
f034b5d4efdfe0 David S. Miller 2006-08-24 177 }
44e36b42a8378b David S. Miller 2006-08-24 178 nspi = xfrm_hash_alloc(nsize);
f034b5d4efdfe0 David S. Miller 2006-08-24 179 if (!nspi) {
ef6562fb0dcb1a Florian Westphal 2025-02-24 180 xfrm_hash_free(ndst);
ef6562fb0dcb1a Florian Westphal 2025-02-24 181 xfrm_hash_free(nsrc);
0244790c8ad240 Ying Xue 2014-08-29 182 return;
f034b5d4efdfe0 David S. Miller 2006-08-24 183 }
fe9f1d8779cb47 Sabrina Dubroca 2021-04-25 184 nseq = xfrm_hash_alloc(nsize);
fe9f1d8779cb47 Sabrina Dubroca 2021-04-25 185 if (!nseq) {
ef6562fb0dcb1a Florian Westphal 2025-02-24 186 xfrm_hash_free(ndst);
ef6562fb0dcb1a Florian Westphal 2025-02-24 187 xfrm_hash_free(nsrc);
ef6562fb0dcb1a Florian Westphal 2025-02-24 188 xfrm_hash_free(nspi);
fe9f1d8779cb47 Sabrina Dubroca 2021-04-25 189 return;
fe9f1d8779cb47 Sabrina Dubroca 2021-04-25 190 }
f034b5d4efdfe0 David S. Miller 2006-08-24 191
283bc9f35bbbcb Fan Du 2013-11-07 192 spin_lock_bh(&net->xfrm.xfrm_state_lock);
e88add19f68191 Ahmed S. Darwish 2021-03-16 193 write_seqcount_begin(&net->xfrm.xfrm_state_hash_generation);
f034b5d4efdfe0 David S. Miller 2006-08-24 194
f034b5d4efdfe0 David S. Miller 2006-08-24 195 nhashmask = (nsize / sizeof(struct hlist_head)) - 1U;
c8406998b80183 Florian Westphal 2016-08-09 196 odst = xfrm_state_deref_prot(net->xfrm.state_bydst, net);
63082733858502 Alexey Dobriyan 2008-11-25 197 for (i = net->xfrm.state_hmask; i >= 0; i--)
fe9f1d8779cb47 Sabrina Dubroca 2021-04-25 198 xfrm_hash_transfer(odst + i, ndst, nsrc, nspi, nseq, nhashmask);
f034b5d4efdfe0 David S. Miller 2006-08-24 199
c8406998b80183 Florian Westphal 2016-08-09 200 osrc = xfrm_state_deref_prot(net->xfrm.state_bysrc, net);
c8406998b80183 Florian Westphal 2016-08-09 201 ospi = xfrm_state_deref_prot(net->xfrm.state_byspi, net);
fe9f1d8779cb47 Sabrina Dubroca 2021-04-25 202 oseq = xfrm_state_deref_prot(net->xfrm.state_byseq, net);
63082733858502 Alexey Dobriyan 2008-11-25 203 ohashmask = net->xfrm.state_hmask;
f034b5d4efdfe0 David S. Miller 2006-08-24 204
c8406998b80183 Florian Westphal 2016-08-09 205 rcu_assign_pointer(net->xfrm.state_bydst, ndst);
c8406998b80183 Florian Westphal 2016-08-09 206 rcu_assign_pointer(net->xfrm.state_bysrc, nsrc);
c8406998b80183 Florian Westphal 2016-08-09 207 rcu_assign_pointer(net->xfrm.state_byspi, nspi);
fe9f1d8779cb47 Sabrina Dubroca 2021-04-25 208 rcu_assign_pointer(net->xfrm.state_byseq, nseq);
63082733858502 Alexey Dobriyan 2008-11-25 209 net->xfrm.state_hmask = nhashmask;
f034b5d4efdfe0 David S. Miller 2006-08-24 210
e88add19f68191 Ahmed S. Darwish 2021-03-16 211 write_seqcount_end(&net->xfrm.xfrm_state_hash_generation);
283bc9f35bbbcb Fan Du 2013-11-07 212 spin_unlock_bh(&net->xfrm.xfrm_state_lock);
f034b5d4efdfe0 David S. Miller 2006-08-24 213
df7274eb70b7c8 Florian Westphal 2016-08-09 214 synchronize_rcu();
df7274eb70b7c8 Florian Westphal 2016-08-09 215
ef6562fb0dcb1a Florian Westphal 2025-02-24 216 xfrm_hash_free(odst);
ef6562fb0dcb1a Florian Westphal 2025-02-24 217 xfrm_hash_free(osrc);
ef6562fb0dcb1a Florian Westphal 2025-02-24 218 xfrm_hash_free(ospi);
ef6562fb0dcb1a Florian Westphal 2025-02-24 219 xfrm_hash_free(oseq);
f034b5d4efdfe0 David S. Miller 2006-08-24 220 }
f034b5d4efdfe0 David S. Miller 2006-08-24 221
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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