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Date: Thu, 12 Nov 2020 23:05:22 +0800
From: kernel test robot <lkp@...el.com>
To: wenxu@...oud.cn, kuba@...nel.org, marcelo.leitner@...il.com,
vladbu@...dia.com
Cc: kbuild-all@...ts.01.org, netdev@...r.kernel.org
Subject: Re: [PATCH v8 net-next 3/3] net/sched: act_frag: add implict packet
fragment support.
Hi,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on net-next/master]
url: https://github.com/0day-ci/linux/commits/wenxu-ucloud-cn/net-sched-fix-over-mtu-packet-of-defrag-in/20201111-143001
base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git 70408949a35f1a31c327c69b6a187635cb0305fa
:::::: branch date: 3 hours ago
:::::: commit date: 3 hours ago
config: x86_64-randconfig-s021-20201111 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
reproduce:
# apt-get install sparse
# sparse version: v0.6.3-106-gd020cf33-dirty
# https://github.com/0day-ci/linux/commit/a551316818f8b3f9164d7a734538decca3762fda
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review wenxu-ucloud-cn/net-sched-fix-over-mtu-packet-of-defrag-in/20201111-143001
git checkout a551316818f8b3f9164d7a734538decca3762fda
# save the attached .config to linux build tree
make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=x86_64
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
"sparse warnings: (new ones prefixed by >>)"
net/sched/act_api.c:30:5: sparse: sparse: symbol 'tcf_set_xmit_hook' redeclared with different type (incompatible argument 1 (different address spaces)):
>> net/sched/act_api.c:30:5: sparse: int extern [addressable] [signed] [toplevel] tcf_set_xmit_hook( ... )
net/sched/act_api.c: note: in included file (through include/net/pkt_cls.h):
include/net/act_api.h:244:5: sparse: note: previously declared as:
>> include/net/act_api.h:244:5: sparse: int extern [addressable] [signed] [toplevel] tcf_set_xmit_hook( ... )
>> net/sched/act_api.c:64:19: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected int ( [noderef] __rcu *xmit_hook )( ... ) @@ got int ( [noderef] * )( ... ) @@
>> net/sched/act_api.c:64:19: sparse: expected int ( [noderef] __rcu *xmit_hook )( ... )
net/sched/act_api.c:64:19: sparse: got int ( [noderef] * )( ... )
vim +30 net/sched/act_api.c
a551316818f8b3f wenxu 2020-11-11 29
a551316818f8b3f wenxu 2020-11-11 @30 int tcf_set_xmit_hook(int (__rcu *xmit_hook)(struct sk_buff *skb,
a551316818f8b3f wenxu 2020-11-11 31 int (*xmit)(struct sk_buff *skb)))
a551316818f8b3f wenxu 2020-11-11 32 {
a551316818f8b3f wenxu 2020-11-11 33 spin_lock(&tcf_xmit_hook_lock);
a551316818f8b3f wenxu 2020-11-11 34 if (!tcf_xmit_hook_count) {
a551316818f8b3f wenxu 2020-11-11 35 rcu_assign_pointer(tcf_xmit_hook, xmit_hook);
a551316818f8b3f wenxu 2020-11-11 36 } else if (xmit_hook != tcf_xmit_hook) {
a551316818f8b3f wenxu 2020-11-11 37 spin_unlock(&tcf_xmit_hook_lock);
a551316818f8b3f wenxu 2020-11-11 38 return -EBUSY;
a551316818f8b3f wenxu 2020-11-11 39 }
a551316818f8b3f wenxu 2020-11-11 40
a551316818f8b3f wenxu 2020-11-11 41 tcf_xmit_hook_count++;
a551316818f8b3f wenxu 2020-11-11 42 spin_unlock(&tcf_xmit_hook_lock);
a551316818f8b3f wenxu 2020-11-11 43
a551316818f8b3f wenxu 2020-11-11 44 return 0;
a551316818f8b3f wenxu 2020-11-11 45 }
a551316818f8b3f wenxu 2020-11-11 46 EXPORT_SYMBOL_GPL(tcf_set_xmit_hook);
a551316818f8b3f wenxu 2020-11-11 47
a551316818f8b3f wenxu 2020-11-11 48 void tcf_clear_xmit_hook(void)
a551316818f8b3f wenxu 2020-11-11 49 {
a551316818f8b3f wenxu 2020-11-11 50 spin_lock(&tcf_xmit_hook_lock);
a551316818f8b3f wenxu 2020-11-11 51 if (--tcf_xmit_hook_count == 0)
a551316818f8b3f wenxu 2020-11-11 52 rcu_assign_pointer(tcf_xmit_hook, NULL);
a551316818f8b3f wenxu 2020-11-11 53 spin_unlock(&tcf_xmit_hook_lock);
a551316818f8b3f wenxu 2020-11-11 54
a551316818f8b3f wenxu 2020-11-11 55 synchronize_rcu();
a551316818f8b3f wenxu 2020-11-11 56 }
a551316818f8b3f wenxu 2020-11-11 57 EXPORT_SYMBOL_GPL(tcf_clear_xmit_hook);
a551316818f8b3f wenxu 2020-11-11 58
a551316818f8b3f wenxu 2020-11-11 59 int tcf_dev_queue_xmit(struct sk_buff *skb, int (*xmit)(struct sk_buff *skb))
a551316818f8b3f wenxu 2020-11-11 60 {
a551316818f8b3f wenxu 2020-11-11 61 int (__rcu *xmit_hook)(struct sk_buff *skb,
a551316818f8b3f wenxu 2020-11-11 62 int (*xmit)(struct sk_buff *skb));
a551316818f8b3f wenxu 2020-11-11 63
a551316818f8b3f wenxu 2020-11-11 @64 xmit_hook = rcu_dereference(tcf_xmit_hook);
a551316818f8b3f wenxu 2020-11-11 65 if (xmit_hook)
a551316818f8b3f wenxu 2020-11-11 66 return xmit_hook(skb, xmit);
a551316818f8b3f wenxu 2020-11-11 67 else
a551316818f8b3f wenxu 2020-11-11 68 return xmit(skb);
a551316818f8b3f wenxu 2020-11-11 69 }
a551316818f8b3f wenxu 2020-11-11 70 EXPORT_SYMBOL_GPL(tcf_dev_queue_xmit);
a551316818f8b3f wenxu 2020-11-11 71
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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