Re: [PATCH] net: neterion: vxge: reduce stack usage in VXGE_COMPLETE_VPATH_TX
From: kernel test robot
Date: Thu Jul 16 2020 - 07:21:55 EST
Hi Bixuan,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on sparc-next/master]
[also build test WARNING on net-next/master net/master linus/master v5.8-rc5 next-20200716]
[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]
url: https://github.com/0day-ci/linux/commits/Bixuan-Cui/net-neterion-vxge-reduce-stack-usage-in-VXGE_COMPLETE_VPATH_TX/20200716-173219
base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next.git master
config: s390-allyesconfig (attached as .config)
compiler: s390-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=s390
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>
All warnings (new ones prefixed by >>):
91 | #define this_cpu_add_8(pcp, val) arch_this_cpu_add(pcp, val, "laag", "agsi", long)
| ^~~~~~~~~~~~~~~~~
include/linux/percpu-defs.h:380:11: note: in expansion of macro 'this_cpu_add_8'
380 | case 8: stem##8(variable, __VA_ARGS__);break; \
| ^~~~
include/linux/percpu-defs.h:509:33: note: in expansion of macro '__pcpu_size_call'
509 | #define this_cpu_add(pcp, val) __pcpu_size_call(this_cpu_add_, pcp, val)
| ^~~~~~~~~~~~~~~~
include/linux/percpu-defs.h:519:33: note: in expansion of macro 'this_cpu_add'
519 | #define this_cpu_sub(pcp, val) this_cpu_add(pcp, -(typeof(pcp))(val))
| ^~~~~~~~~~~~
include/linux/percpu-defs.h:521:28: note: in expansion of macro 'this_cpu_sub'
521 | #define this_cpu_dec(pcp) this_cpu_sub(pcp, 1)
| ^~~~~~~~~~~~
include/net/sch_generic.h:872:2: note: in expansion of macro 'this_cpu_dec'
872 | this_cpu_dec(sch->cpu_qstats->qlen);
| ^~~~~~~~~~~~
include/net/sch_generic.h: In function 'qdisc_qstats_cpu_requeues_inc':
arch/s390/include/asm/percpu.h:74:21: warning: comparison is always true due to limited range of data type [-Wtype-limits]
74 | ((szcast)val__ > -129) && ((szcast)val__ < 128)) { \
| ^
arch/s390/include/asm/percpu.h:91:34: note: in expansion of macro 'arch_this_cpu_add'
91 | #define this_cpu_add_8(pcp, val) arch_this_cpu_add(pcp, val, "laag", "agsi", long)
| ^~~~~~~~~~~~~~~~~
include/linux/percpu-defs.h:380:11: note: in expansion of macro 'this_cpu_add_8'
380 | case 8: stem##8(variable, __VA_ARGS__);break; \
| ^~~~
include/linux/percpu-defs.h:509:33: note: in expansion of macro '__pcpu_size_call'
509 | #define this_cpu_add(pcp, val) __pcpu_size_call(this_cpu_add_, pcp, val)
| ^~~~~~~~~~~~~~~~
include/linux/percpu-defs.h:520:28: note: in expansion of macro 'this_cpu_add'
520 | #define this_cpu_inc(pcp) this_cpu_add(pcp, 1)
| ^~~~~~~~~~~~
include/net/sch_generic.h:877:2: note: in expansion of macro 'this_cpu_inc'
877 | this_cpu_inc(sch->cpu_qstats->requeues);
| ^~~~~~~~~~~~
include/net/sch_generic.h: In function 'qdisc_qstats_cpu_drop':
arch/s390/include/asm/percpu.h:74:21: warning: comparison is always true due to limited range of data type [-Wtype-limits]
74 | ((szcast)val__ > -129) && ((szcast)val__ < 128)) { \
| ^
arch/s390/include/asm/percpu.h:91:34: note: in expansion of macro 'arch_this_cpu_add'
91 | #define this_cpu_add_8(pcp, val) arch_this_cpu_add(pcp, val, "laag", "agsi", long)
| ^~~~~~~~~~~~~~~~~
include/linux/percpu-defs.h:380:11: note: in expansion of macro 'this_cpu_add_8'
380 | case 8: stem##8(variable, __VA_ARGS__);break; \
| ^~~~
include/linux/percpu-defs.h:509:33: note: in expansion of macro '__pcpu_size_call'
509 | #define this_cpu_add(pcp, val) __pcpu_size_call(this_cpu_add_, pcp, val)
| ^~~~~~~~~~~~~~~~
include/linux/percpu-defs.h:520:28: note: in expansion of macro 'this_cpu_add'
520 | #define this_cpu_inc(pcp) this_cpu_add(pcp, 1)
| ^~~~~~~~~~~~
include/net/sch_generic.h:902:2: note: in expansion of macro 'this_cpu_inc'
902 | this_cpu_inc(sch->cpu_qstats->drops);
| ^~~~~~~~~~~~
include/net/sch_generic.h: In function 'qdisc_update_stats_at_enqueue':
arch/s390/include/asm/percpu.h:74:21: warning: comparison is always true due to limited range of data type [-Wtype-limits]
74 | ((szcast)val__ > -129) && ((szcast)val__ < 128)) { \
| ^
arch/s390/include/asm/percpu.h:91:34: note: in expansion of macro 'arch_this_cpu_add'
91 | #define this_cpu_add_8(pcp, val) arch_this_cpu_add(pcp, val, "laag", "agsi", long)
| ^~~~~~~~~~~~~~~~~
include/linux/percpu-defs.h:380:11: note: in expansion of macro 'this_cpu_add_8'
380 | case 8: stem##8(variable, __VA_ARGS__);break; \
| ^~~~
include/linux/percpu-defs.h:509:33: note: in expansion of macro '__pcpu_size_call'
509 | #define this_cpu_add(pcp, val) __pcpu_size_call(this_cpu_add_, pcp, val)
| ^~~~~~~~~~~~~~~~
include/net/sch_generic.h:1101:3: note: in expansion of macro 'this_cpu_add'
1101 | this_cpu_add(sch->cpu_qstats->backlog, pkt_len);
| ^~~~~~~~~~~~
include/net/sch_generic.h: In function 'mini_qdisc_qstats_cpu_drop':
arch/s390/include/asm/percpu.h:74:21: warning: comparison is always true due to limited range of data type [-Wtype-limits]
74 | ((szcast)val__ > -129) && ((szcast)val__ < 128)) { \
| ^
arch/s390/include/asm/percpu.h:91:34: note: in expansion of macro 'arch_this_cpu_add'
91 | #define this_cpu_add_8(pcp, val) arch_this_cpu_add(pcp, val, "laag", "agsi", long)
| ^~~~~~~~~~~~~~~~~
include/linux/percpu-defs.h:380:11: note: in expansion of macro 'this_cpu_add_8'
380 | case 8: stem##8(variable, __VA_ARGS__);break; \
| ^~~~
include/linux/percpu-defs.h:509:33: note: in expansion of macro '__pcpu_size_call'
509 | #define this_cpu_add(pcp, val) __pcpu_size_call(this_cpu_add_, pcp, val)
| ^~~~~~~~~~~~~~~~
include/linux/percpu-defs.h:520:28: note: in expansion of macro 'this_cpu_add'
520 | #define this_cpu_inc(pcp) this_cpu_add(pcp, 1)
| ^~~~~~~~~~~~
include/net/sch_generic.h:1270:2: note: in expansion of macro 'this_cpu_inc'
1270 | this_cpu_inc(miniq->cpu_qstats->drops);
| ^~~~~~~~~~~~
drivers/net/ethernet/neterion/vxge/vxge-main.c: In function 'VXGE_COMPLETE_VPATH_TX':
drivers/net/ethernet/neterion/vxge/vxge-main.c:103:19: error: conflicting types for 'completed'
103 | struct sk_buff **completed;
| ^~~~~~~~~
drivers/net/ethernet/neterion/vxge/vxge-main.c:102:18: note: previous declaration of 'completed' was here
102 | struct sk_buff *completed[NR_SKB_COMPLETED];
| ^~~~~~~~~
drivers/net/ethernet/neterion/vxge/vxge-main.c:126:2: error: implicit declaration of function 'free' [-Werror=implicit-function-declaration]
126 | free(completed);
| ^~~~
>> drivers/net/ethernet/neterion/vxge/vxge-main.c:126:2: warning: incompatible implicit declaration of built-in function 'free'
drivers/net/ethernet/neterion/vxge/vxge-main.c:60:1: note: include '<stdlib.h>' or provide a declaration of 'free'
59 | #include "vxge-main.h"
+++ |+#include <stdlib.h>
60 | #include "vxge-reg.h"
cc1: some warnings being treated as errors
vim +/free +126 drivers/net/ethernet/neterion/vxge/vxge-main.c
96
97 static inline void VXGE_COMPLETE_VPATH_TX(struct vxge_fifo *fifo)
98 {
99 struct sk_buff **skb_ptr = NULL;
100 struct sk_buff **temp;
101 #define NR_SKB_COMPLETED 128
102 struct sk_buff *completed[NR_SKB_COMPLETED];
103 struct sk_buff **completed;
104 int more;
105
106 completed = kcalloc(NR_SKB_COMPLETED, sizeof(*completed),
107 GFP_KERNEL);
108 if (!completed)
109 return;
110
111 do {
112 more = 0;
113 skb_ptr = completed;
114
115 if (__netif_tx_trylock(fifo->txq)) {
116 vxge_hw_vpath_poll_tx(fifo->handle, &skb_ptr,
117 NR_SKB_COMPLETED, &more);
118 __netif_tx_unlock(fifo->txq);
119 }
120
121 /* free SKBs */
122 for (temp = completed; temp != skb_ptr; temp++)
123 dev_consume_skb_irq(*temp);
124 } while (more);
125
> 126 free(completed);
127 }
128
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
Attachment:
.config.gz
Description: application/gzip