Hi Baoquan, I love your patch! Perhaps something to improve: [auto build test WARNING on linus/master] [also build test WARNING on v4.17 next-20180608] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Baoquan-He/resource-Use-list_head-to-link-sibling-resource/20180612-113600 config: x86_64-randconfig-x011-201823 (attached as .config) compiler: gcc-7 (Debian 7.3.0-16) 7.3.0 reproduce: # save the attached .config to linux build tree make ARCH=x86_64 All warnings (new ones prefixed by >>): kernel/resource.c: In function 'reparent_resources': kernel/resource.c:1005:26: error: passing argument 2 of 'list_add' from incompatible pointer type [-Werror=incompatible-pointer-types] list_add(&res->sibling, &p->sibling.prev); ^ In file included from include/linux/ioport.h:15:0, from kernel/resource.c:14: include/linux/list.h:77:20: note: expected 'struct list_head *' but argument is of type 'struct list_head **' static inline void list_add(struct list_head *new, struct list_head *head) ^~~~~~~~ In file included from include/linux/list.h:9:0, from include/linux/ioport.h:15, from kernel/resource.c:14: kernel/resource.c:1013:26: error: 'new' undeclared (first use in this function); did you mean 'net'? list_for_each_entry(p, &new->child, sibling) { ^ include/linux/kernel.h:963:26: note: in definition of macro 'container_of' void *__mptr = (void *)(ptr); \ ^~~ include/linux/list.h:377:2: note: in expansion of macro 'list_entry' list_entry((ptr)->next, type, member) ^~~~~~~~~~ include/linux/list.h:464:13: note: in expansion of macro 'list_first_entry' for (pos = list_first_entry(head, typeof(*pos), member); \ ^~~~~~~~~~~~~~~~ >> kernel/resource.c:1013:2: note: in expansion of macro 'list_for_each_entry' list_for_each_entry(p, &new->child, sibling) { ^~~~~~~~~~~~~~~~~~~ kernel/resource.c:1013:26: note: each undeclared identifier is reported only once for each function it appears in list_for_each_entry(p, &new->child, sibling) { ^ include/linux/kernel.h:963:26: note: in definition of macro 'container_of' void *__mptr = (void *)(ptr); \ ^~~ include/linux/list.h:377:2: note: in expansion of macro 'list_entry' list_entry((ptr)->next, type, member) ^~~~~~~~~~ include/linux/list.h:464:13: note: in expansion of macro 'list_first_entry' for (pos = list_first_entry(head, typeof(*pos), member); \ ^~~~~~~~~~~~~~~~ >> kernel/resource.c:1013:2: note: in expansion of macro 'list_for_each_entry' list_for_each_entry(p, &new->child, sibling) { ^~~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +/list_for_each_entry +1013 kernel/resource.c 983 984 /* 985 * Reparent resource children of pr that conflict with res 986 * under res, and make res replace those children. 987 */ 988 int reparent_resources(struct resource *parent, struct resource *res) 989 { 990 struct resource *p, *first = NULL; 991 992 list_for_each_entry(p, &parent->child, sibling) { 993 if (p->end < res->start) 994 continue; 995 if (res->end < p->start) 996 break; 997 if (p->start < res->start || p->end > res->end) 998 return -1; /* not completely contained */ 999 if (first == NULL) 1000 first = p; 1001 } 1002 if (first == NULL) 1003 return -1; /* didn't find any conflicting entries? */ 1004 res->parent = parent; 1005 list_add(&res->sibling, &p->sibling.prev); 1006 INIT_LIST_HEAD(&res->child); 1007 1008 /* 1009 * From first to p's previous sibling, they all fall into 1010 * res's region, change them as res's children. 1011 */ 1012 list_cut_position(&res->child, first->sibling.prev, res->sibling.prev); > 1013 list_for_each_entry(p, &new->child, sibling) { 1014 p->parent = new; 1015 pr_debug("PCI: Reparented %s %pR under %s\n", 1016 p->name, p, res->name); 1017 } 1018 return 0; 1019 } 1020 EXPORT_SYMBOL(reparent_resources); 1021 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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