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Message-ID: <202506231924.kPX5UiaD-lkp@intel.com>
Date: Mon, 23 Jun 2025 19:59:52 +0800
From: kernel test robot <lkp@...el.com>
To: cp0613@...ux.alibaba.com, yury.norov@...il.com,
linux@...musvillemoes.dk, arnd@...db.de, paul.walmsley@...ive.com,
palmer@...belt.com, aou@...s.berkeley.edu, alex@...ti.fr
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
linux-riscv@...ts.infradead.org, linux-arch@...r.kernel.org,
linux-kernel@...r.kernel.org, Chen Pei <cp0613@...ux.alibaba.com>
Subject: Re: [PATCH 1/2] bitops: generic rotate
Hi,
kernel test robot noticed the following build warnings:
[auto build test WARNING on arnd-asm-generic/master]
[also build test WARNING on linus/master v6.16-rc3 next-20250623]
[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/cp0613-linux-alibaba-com/bitops-generic-rotate/20250620-192016
base: https://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic.git master
patch link: https://lore.kernel.org/r/20250620111610.52750-2-cp0613%40linux.alibaba.com
patch subject: [PATCH 1/2] bitops: generic rotate
config: powerpc-allyesconfig (https://download.01.org/0day-ci/archive/20250623/202506231924.kPX5UiaD-lkp@intel.com/config)
compiler: clang version 21.0.0git (https://github.com/llvm/llvm-project 875b36a8742437b95f623bab1e0332562c7b4b3f)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250623/202506231924.kPX5UiaD-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/202506231924.kPX5UiaD-lkp@intel.com/
All warnings (new ones prefixed by >>):
| ^
In file included from drivers/net/ethernet/pensando/ionic/ionic_txrx.c:5:
In file included from include/linux/ipv6.h:102:
In file included from include/linux/tcp.h:19:
In file included from include/net/sock.h:46:
In file included from include/linux/netdevice.h:44:
In file included from include/uapi/linux/neighbour.h:6:
In file included from include/linux/netlink.h:9:
In file included from include/net/scm.h:13:
In file included from include/net/compat.h:8:
include/linux/compat.h:458:22: warning: array index 1 is past the end of the array (that has type 'const unsigned long[1]') [-Warray-bounds]
458 | case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1];
| ^ ~
arch/powerpc/include/uapi/asm/signal.h:18:2: note: array 'sig' declared here
18 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from drivers/net/ethernet/pensando/ionic/ionic_txrx.c:5:
In file included from include/linux/ipv6.h:102:
In file included from include/linux/tcp.h:19:
In file included from include/net/sock.h:46:
In file included from include/linux/netdevice.h:44:
In file included from include/uapi/linux/neighbour.h:6:
In file included from include/linux/netlink.h:9:
In file included from include/net/scm.h:13:
In file included from include/net/compat.h:8:
include/linux/compat.h:458:10: warning: array index 3 is past the end of the array (that has type 'compat_sigset_word[2]' (aka 'unsigned int[2]')) [-Warray-bounds]
458 | case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1];
| ^ ~
include/linux/compat.h:130:2: note: array 'sig' declared here
130 | compat_sigset_word sig[_COMPAT_NSIG_WORDS];
| ^
include/linux/compat.h:458:42: warning: array index 2 is past the end of the array (that has type 'compat_sigset_word[2]' (aka 'unsigned int[2]')) [-Warray-bounds]
458 | case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1];
| ^ ~
include/linux/compat.h:130:2: note: array 'sig' declared here
130 | compat_sigset_word sig[_COMPAT_NSIG_WORDS];
| ^
include/linux/compat.h:458:53: warning: array index 1 is past the end of the array (that has type 'const unsigned long[1]') [-Warray-bounds]
458 | case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1];
| ^ ~
arch/powerpc/include/uapi/asm/signal.h:18:2: note: array 'sig' declared here
18 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from drivers/net/ethernet/pensando/ionic/ionic_txrx.c:5:
In file included from include/linux/ipv6.h:102:
In file included from include/linux/tcp.h:20:
In file included from include/net/inet_connection_sock.h:21:
In file included from include/net/inet_sock.h:18:
include/linux/jhash.h:83:3: error: call to undeclared function 'rol32'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
83 | __jhash_mix(a, b, c);
| ^
include/linux/jhash.h:37:16: note: expanded from macro '__jhash_mix'
37 | a -= c; a ^= rol32(c, 4); c += b; \
| ^
include/linux/jhash.h:101:4: error: call to undeclared function 'rol32'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
101 | __jhash_final(a, b, c);
| ^
include/linux/jhash.h:48:15: note: expanded from macro '__jhash_final'
48 | c ^= b; c -= rol32(b, 14); \
| ^
include/linux/jhash.h:129:3: error: call to undeclared function 'rol32'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
129 | __jhash_mix(a, b, c);
| ^
include/linux/jhash.h:37:16: note: expanded from macro '__jhash_mix'
37 | a -= c; a ^= rol32(c, 4); c += b; \
| ^
include/linux/jhash.h:139:3: error: call to undeclared function 'rol32'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
139 | __jhash_final(a, b, c);
| ^
include/linux/jhash.h:48:15: note: expanded from macro '__jhash_final'
48 | c ^= b; c -= rol32(b, 14); \
| ^
include/linux/jhash.h:156:2: error: call to undeclared function 'rol32'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
156 | __jhash_final(a, b, c);
| ^
include/linux/jhash.h:48:15: note: expanded from macro '__jhash_final'
48 | c ^= b; c -= rol32(b, 14); \
| ^
In file included from drivers/net/ethernet/pensando/ionic/ionic_txrx.c:7:
In file included from include/net/ip6_checksum.h:27:
In file included from include/net/ip.h:30:
In file included from include/net/route.h:24:
In file included from include/net/inetpeer.h:16:
include/net/ipv6.h:975:9: error: call to undeclared function 'rol32'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
975 | hash = rol32(hash, 16);
| ^
In file included from drivers/net/ethernet/pensando/ionic/ionic_txrx.c:7:
In file included from include/net/ip6_checksum.h:27:
include/net/ip.h:478:14: warning: default initialization of an object of type 'typeof (rt->dst.expires)' (aka 'const unsigned long') leaves the object uninitialized [-Wdefault-const-init-var-unsafe]
478 | if (mtu && time_before(jiffies, rt->dst.expires))
| ^
include/linux/jiffies.h:138:26: note: expanded from macro 'time_before'
138 | #define time_before(a,b) time_after(b,a)
| ^
include/linux/jiffies.h:128:3: note: expanded from macro 'time_after'
128 | (typecheck(unsigned long, a) && \
| ^
include/linux/typecheck.h:11:12: note: expanded from macro 'typecheck'
11 | typeof(x) __dummy2; \
| ^
>> drivers/net/ethernet/pensando/ionic/ionic_txrx.c:203:30: warning: implicit conversion from 'unsigned long' to 'u16' (aka 'unsigned short') changes value from 65536 to 0 [-Wconstant-conversion]
203 | frag_len = min_t(u16, len, IONIC_PAGE_SIZE);
| ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~
drivers/net/ethernet/pensando/ionic/ionic_dev.h:184:32: note: expanded from macro 'IONIC_PAGE_SIZE'
184 | #define IONIC_PAGE_SIZE MIN(PAGE_SIZE, IONIC_MAX_BUF_LEN)
| ^
include/vdso/page.h:15:30: note: expanded from macro 'PAGE_SIZE'
15 | #define PAGE_SIZE (_AC(1,UL) << CONFIG_PAGE_SHIFT)
| ^
include/linux/minmax.h:314:30: note: expanded from macro 'MIN'
314 | #define MIN(a, b) __cmp(min, a, b)
| ^
note: (skipping 1 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
include/linux/minmax.h:161:52: note: expanded from macro 'min_t'
161 | #define min_t(type, x, y) __cmp_once(min, type, x, y)
| ~~~~~~~~~~~~~~~~~~~~~~~~~^~
include/linux/minmax.h:89:33: note: expanded from macro '__cmp_once'
89 | __cmp_once_unique(op, type, x, y, __UNIQUE_ID(x_), __UNIQUE_ID(y_))
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/minmax.h:86:31: note: expanded from macro '__cmp_once_unique'
86 | ({ type ux = (x); type uy = (y); __cmp(op, ux, uy); })
| ~~ ^
drivers/net/ethernet/pensando/ionic/ionic_txrx.c:803:36: warning: implicit conversion from 'unsigned long' to 'u16' (aka 'unsigned short') changes value from 65536 to 0 [-Wconstant-conversion]
803 | first_frag_len = min_t(u16, len, IONIC_PAGE_SIZE);
| ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~
drivers/net/ethernet/pensando/ionic/ionic_dev.h:184:32: note: expanded from macro 'IONIC_PAGE_SIZE'
184 | #define IONIC_PAGE_SIZE MIN(PAGE_SIZE, IONIC_MAX_BUF_LEN)
| ^
include/vdso/page.h:15:30: note: expanded from macro 'PAGE_SIZE'
15 | #define PAGE_SIZE (_AC(1,UL) << CONFIG_PAGE_SHIFT)
| ^
include/linux/minmax.h:314:30: note: expanded from macro 'MIN'
314 | #define MIN(a, b) __cmp(min, a, b)
| ^
note: (skipping 1 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
include/linux/minmax.h:161:52: note: expanded from macro 'min_t'
161 | #define min_t(type, x, y) __cmp_once(min, type, x, y)
| ~~~~~~~~~~~~~~~~~~~~~~~~~^~
include/linux/minmax.h:89:33: note: expanded from macro '__cmp_once'
89 | __cmp_once_unique(op, type, x, y, __UNIQUE_ID(x_), __UNIQUE_ID(y_))
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/minmax.h:86:31: note: expanded from macro '__cmp_once_unique'
86 | ({ type ux = (x); type uy = (y); __cmp(op, ux, uy); })
| ~~ ^
drivers/net/ethernet/pensando/ionic/ionic_txrx.c:838:38: warning: implicit conversion from 'unsigned long' to 'u16' (aka 'unsigned short') changes value from 65536 to 0 [-Wconstant-conversion]
838 | frag_len = min_t(u16, remain_len, IONIC_PAGE_SIZE);
| ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~
drivers/net/ethernet/pensando/ionic/ionic_dev.h:184:32: note: expanded from macro 'IONIC_PAGE_SIZE'
184 | #define IONIC_PAGE_SIZE MIN(PAGE_SIZE, IONIC_MAX_BUF_LEN)
| ^
include/vdso/page.h:15:30: note: expanded from macro 'PAGE_SIZE'
15 | #define PAGE_SIZE (_AC(1,UL) << CONFIG_PAGE_SHIFT)
| ^
include/linux/minmax.h:314:30: note: expanded from macro 'MIN'
314 | #define MIN(a, b) __cmp(min, a, b)
| ^
note: (skipping 1 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
include/linux/minmax.h:161:52: note: expanded from macro 'min_t'
161 | #define min_t(type, x, y) __cmp_once(min, type, x, y)
| ~~~~~~~~~~~~~~~~~~~~~~~~~^~
include/linux/minmax.h:89:33: note: expanded from macro '__cmp_once'
89 | __cmp_once_unique(op, type, x, y, __UNIQUE_ID(x_), __UNIQUE_ID(y_))
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/minmax.h:86:31: note: expanded from macro '__cmp_once_unique'
86 | ({ type ux = (x); type uy = (y); __cmp(op, ux, uy); })
| ~~ ^
16 warnings and 9 errors generated.
vim +203 drivers/net/ethernet/pensando/ionic/ionic_txrx.c
36a47c906b23240 Shannon Nelson 2024-03-06 174
36a47c906b23240 Shannon Nelson 2024-03-06 175 static struct sk_buff *ionic_rx_build_skb(struct ionic_queue *q,
4dcd4575bfb17d0 Shannon Nelson 2024-03-06 176 struct ionic_rx_desc_info *desc_info,
f81da39bf4c0a54 Shannon Nelson 2024-02-14 177 unsigned int headroom,
f81da39bf4c0a54 Shannon Nelson 2024-02-14 178 unsigned int len,
f81da39bf4c0a54 Shannon Nelson 2024-02-14 179 unsigned int num_sg_elems,
180e35cdf035d1c Shannon Nelson 2024-02-14 180 bool synced)
0f3154e6bcb3549 Shannon Nelson 2019-09-03 181 {
4b0a7539a3728f0 Shannon Nelson 2021-03-10 182 struct ionic_buf_info *buf_info;
08f2e4b2b2008ce Shannon Nelson 2019-10-23 183 struct sk_buff *skb;
08f2e4b2b2008ce Shannon Nelson 2019-10-23 184 unsigned int i;
08f2e4b2b2008ce Shannon Nelson 2019-10-23 185 u16 frag_len;
08f2e4b2b2008ce Shannon Nelson 2019-10-23 186
4b0a7539a3728f0 Shannon Nelson 2021-03-10 187 buf_info = &desc_info->bufs[0];
e75ccac1d0644c9 Shannon Nelson 2021-07-27 188 prefetchw(buf_info->page);
08f2e4b2b2008ce Shannon Nelson 2019-10-23 189
89e572e7369fd9a Shannon Nelson 2021-03-10 190 skb = napi_get_frags(&q_to_qcq(q)->napi);
89e572e7369fd9a Shannon Nelson 2021-03-10 191 if (unlikely(!skb)) {
89e572e7369fd9a Shannon Nelson 2021-03-10 192 net_warn_ratelimited("%s: SKB alloc failed on %s!\n",
36a47c906b23240 Shannon Nelson 2024-03-06 193 dev_name(q->dev), q->name);
2854242d23a7b3a Shannon Nelson 2024-03-06 194 q_to_rx_stats(q)->alloc_err++;
08f2e4b2b2008ce Shannon Nelson 2019-10-23 195 return NULL;
89e572e7369fd9a Shannon Nelson 2021-03-10 196 }
ac8813c0ab7d281 Shannon Nelson 2024-09-06 197 skb_mark_for_recycle(skb);
08f2e4b2b2008ce Shannon Nelson 2019-10-23 198
f81da39bf4c0a54 Shannon Nelson 2024-02-14 199 if (headroom)
36a47c906b23240 Shannon Nelson 2024-03-06 200 frag_len = min_t(u16, len,
36a47c906b23240 Shannon Nelson 2024-03-06 201 IONIC_XDP_MAX_LINEAR_MTU + VLAN_ETH_HLEN);
f81da39bf4c0a54 Shannon Nelson 2024-02-14 202 else
ac8813c0ab7d281 Shannon Nelson 2024-09-06 @203 frag_len = min_t(u16, len, IONIC_PAGE_SIZE);
f81da39bf4c0a54 Shannon Nelson 2024-02-14 204
36a47c906b23240 Shannon Nelson 2024-03-06 205 if (unlikely(!buf_info->page))
36a47c906b23240 Shannon Nelson 2024-03-06 206 goto err_bad_buf_page;
36a47c906b23240 Shannon Nelson 2024-03-06 207 ionic_rx_add_skb_frag(q, skb, buf_info, headroom, frag_len, synced);
36a47c906b23240 Shannon Nelson 2024-03-06 208 len -= frag_len;
4b0a7539a3728f0 Shannon Nelson 2021-03-10 209 buf_info++;
4b0a7539a3728f0 Shannon Nelson 2021-03-10 210
36a47c906b23240 Shannon Nelson 2024-03-06 211 for (i = 0; i < num_sg_elems; i++, buf_info++) {
36a47c906b23240 Shannon Nelson 2024-03-06 212 if (unlikely(!buf_info->page))
36a47c906b23240 Shannon Nelson 2024-03-06 213 goto err_bad_buf_page;
ac8813c0ab7d281 Shannon Nelson 2024-09-06 214 frag_len = min_t(u16, len, buf_info->len);
36a47c906b23240 Shannon Nelson 2024-03-06 215 ionic_rx_add_skb_frag(q, skb, buf_info, 0, frag_len, synced);
36a47c906b23240 Shannon Nelson 2024-03-06 216 len -= frag_len;
36a47c906b23240 Shannon Nelson 2024-03-06 217 }
08f2e4b2b2008ce Shannon Nelson 2019-10-23 218
08f2e4b2b2008ce Shannon Nelson 2019-10-23 219 return skb;
36a47c906b23240 Shannon Nelson 2024-03-06 220
36a47c906b23240 Shannon Nelson 2024-03-06 221 err_bad_buf_page:
36a47c906b23240 Shannon Nelson 2024-03-06 222 dev_kfree_skb(skb);
36a47c906b23240 Shannon Nelson 2024-03-06 223 return NULL;
0f3154e6bcb3549 Shannon Nelson 2019-09-03 224 }
0f3154e6bcb3549 Shannon Nelson 2019-09-03 225
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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