Hi Eric, [auto build test WARNING on net-next/master]
url: https://github.com/0day-ci/linux/commits/Eric-Dumazet/net-adjust-skb-truesize-in-pskb_expand_head/20170127-082517 config: i386-randconfig-x0-01270914 (attached as .config) compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901 reproduce: # save the attached .config to linux build tree make ARCH=i386 All warnings (new ones prefixed by >>): In file included from include/uapi/linux/stddef.h:1:0, from include/linux/stddef.h:4, from include/uapi/linux/posix_types.h:4, from include/uapi/linux/types.h:13, from include/linux/types.h:5, from include/linux/list.h:4, from include/linux/module.h:9, from net/core/skbuff.c:41: net/core/skbuff.c: In function 'pskb_expand_head': net/core/skbuff.c:1265:37: error: 'sock_edemux' undeclared (first use in this function) if (!skb->sk || skb->destructor == sock_edemux) ^ include/linux/compiler.h:149:30: note: in definition of macro '__trace_if' if (__builtin_constant_p(!!(cond)) ? !!(cond) : \ ^~~~ >> net/core/skbuff.c:1265:2: note: in expansion of macro 'if' if (!skb->sk || skb->destructor == sock_edemux) ^~ net/core/skbuff.c:1265:37: note: each undeclared identifier is reported only once for each function it appears in if (!skb->sk || skb->destructor == sock_edemux) ^ include/linux/compiler.h:149:30: note: in definition of macro '__trace_if' if (__builtin_constant_p(!!(cond)) ? !!(cond) : \ ^~~~ >> net/core/skbuff.c:1265:2: note: in expansion of macro 'if' if (!skb->sk || skb->destructor == sock_edemux) ^~ vim +/if +1265 net/core/skbuff.c 1249 skb->end = size; 1250 off = nhead; 1251 #else 1252 skb->end = skb->head + size; 1253 #endif 1254 skb->tail += off; 1255 skb_headers_offset_update(skb, nhead); 1256 skb->cloned = 0; 1257 skb->hdr_len = 0; 1258 skb->nohdr = 0; 1259 atomic_set(&skb_shinfo(skb)->dataref, 1); 1260 1261 /* It is not generally safe to change skb->truesize. 1262 * For the moment, we really care of rx path, or 1263 * when skb is orphaned (not attached to a socket) 1264 */ > 1265 if (!skb->sk || skb->destructor == sock_edemux) 1266 skb->truesize += size - osize; 1267 1268 return 0; 1269 1270 nofrags: 1271 kfree(data); 1272 nodata: 1273 return -ENOMEM; --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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