tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git staging-testing head: 0badacd779df08fbbc895cf6c488e100b86c1f39 commit: 73d65c8d1a851785af624870424b332f42af1b37 [752/791] staging: lustre: remove libcfs_all.h from lustre/include/*.h config: sh-allmodconfig (attached as .config) compiler: sh4-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 73d65c8d1a851785af624870424b332f42af1b37 # save the attached .config to linux build tree make.cross ARCH=sh All errors (new ones prefixed by >>): drivers/staging/lustre/lustre/mdc/mdc_request.c: In function 'mdc_read_page_remote': >> drivers/staging/lustre/lustre/mdc/mdc_request.c:1200:3: error: implicit declaration of function 'prefetchw' [-Werror=implicit-function-declaration] prefetchw(&page->flags); ^~~~~~~~~ cc1: some warnings being treated as errors vim +/prefetchw +1200 drivers/staging/lustre/lustre/mdc/mdc_request.c 4f76f0ec wang di 2016-08-19 1114 4f76f0ec wang di 2016-08-19 1115 /** 4f76f0ec wang di 2016-08-19 1116 * Read pages from server. 4f76f0ec wang di 2016-08-19 1117 * 4f76f0ec wang di 2016-08-19 1118 * Page in MDS_READPAGE RPC is packed in LU_PAGE_SIZE, and each page contains 4f76f0ec wang di 2016-08-19 1119 * a header lu_dirpage which describes the start/end hash, and whether this 4f76f0ec wang di 2016-08-19 1120 * page is empty (contains no dir entry) or hash collide with next page. 4f76f0ec wang di 2016-08-19 1121 * After client receives reply, several pages will be integrated into dir page 4f76f0ec wang di 2016-08-19 1122 * in PAGE_SIZE (if PAGE_SIZE greater than LU_PAGE_SIZE), and the 4f76f0ec wang di 2016-08-19 1123 * lu_dirpage for this integrated page will be adjusted. 4f76f0ec wang di 2016-08-19 1124 **/ 4f76f0ec wang di 2016-08-19 1125 static int mdc_read_page_remote(void *data, struct page *page0) 4f76f0ec wang di 2016-08-19 1126 { 4f76f0ec wang di 2016-08-19 1127 struct readpage_param *rp = data; 4f76f0ec wang di 2016-08-19 1128 struct page **page_pool; 4f76f0ec wang di 2016-08-19 1129 struct page *page; 4f76f0ec wang di 2016-08-19 1130 struct lu_dirpage *dp; 4f76f0ec wang di 2016-08-19 1131 int rd_pgs = 0; /* number of pages read actually */ 4f76f0ec wang di 2016-08-19 1132 int npages; 4f76f0ec wang di 2016-08-19 1133 struct md_op_data *op_data = rp->rp_mod; 4f76f0ec wang di 2016-08-19 1134 struct ptlrpc_request *req; 4f76f0ec wang di 2016-08-19 1135 int max_pages = op_data->op_max_pages; 4f76f0ec wang di 2016-08-19 1136 struct inode *inode; 4f76f0ec wang di 2016-08-19 1137 struct lu_fid *fid; 4f76f0ec wang di 2016-08-19 1138 int i; 4f76f0ec wang di 2016-08-19 1139 int rc; 4f76f0ec wang di 2016-08-19 1140 4f76f0ec wang di 2016-08-19 1141 LASSERT(max_pages > 0 && max_pages <= PTLRPC_MAX_BRW_PAGES); 4f76f0ec wang di 2016-08-19 1142 inode = op_data->op_data; 4f76f0ec wang di 2016-08-19 1143 fid = &op_data->op_fid1; 4f76f0ec wang di 2016-08-19 1144 LASSERT(inode); 4f76f0ec wang di 2016-08-19 1145 4f76f0ec wang di 2016-08-19 1146 page_pool = kcalloc(max_pages, sizeof(page), GFP_NOFS); 4f76f0ec wang di 2016-08-19 1147 if (page_pool) { 4f76f0ec wang di 2016-08-19 1148 page_pool[0] = page0; 4f76f0ec wang di 2016-08-19 1149 } else { 4f76f0ec wang di 2016-08-19 1150 page_pool = &page0; 4f76f0ec wang di 2016-08-19 1151 max_pages = 1; 4f76f0ec wang di 2016-08-19 1152 } 4f76f0ec wang di 2016-08-19 1153 4f76f0ec wang di 2016-08-19 1154 for (npages = 1; npages < max_pages; npages++) { 453f85d4 Mel Gorman 2017-11-15 1155 page = page_cache_alloc(inode->i_mapping); 4f76f0ec wang di 2016-08-19 1156 if (!page) 4f76f0ec wang di 2016-08-19 1157 break; 4f76f0ec wang di 2016-08-19 1158 page_pool[npages] = page; 4f76f0ec wang di 2016-08-19 1159 } 4f76f0ec wang di 2016-08-19 1160 4f76f0ec wang di 2016-08-19 1161 rc = mdc_getpage(rp->rp_exp, fid, rp->rp_off, page_pool, npages, &req); 4f76f0ec wang di 2016-08-19 1162 if (!rc) { 4f76f0ec wang di 2016-08-19 1163 int lu_pgs = req->rq_bulk->bd_nob_transferred; 4f76f0ec wang di 2016-08-19 1164 4f76f0ec wang di 2016-08-19 1165 rd_pgs = (req->rq_bulk->bd_nob_transferred + 4f76f0ec wang di 2016-08-19 1166 PAGE_SIZE - 1) >> PAGE_SHIFT; 4f76f0ec wang di 2016-08-19 1167 lu_pgs >>= LU_PAGE_SHIFT; 4f76f0ec wang di 2016-08-19 1168 LASSERT(!(req->rq_bulk->bd_nob_transferred & ~LU_PAGE_MASK)); 4f76f0ec wang di 2016-08-19 1169 3cbbf5ed John L. Hammond 2016-09-18 1170 CDEBUG(D_INODE, "read %d(%d) pages\n", rd_pgs, lu_pgs); 4f76f0ec wang di 2016-08-19 1171 4f76f0ec wang di 2016-08-19 1172 mdc_adjust_dirpages(page_pool, rd_pgs, lu_pgs); 4f76f0ec wang di 2016-08-19 1173 4f76f0ec wang di 2016-08-19 1174 SetPageUptodate(page0); 4f76f0ec wang di 2016-08-19 1175 } 4f76f0ec wang di 2016-08-19 1176 4f76f0ec wang di 2016-08-19 1177 unlock_page(page0); 4f76f0ec wang di 2016-08-19 1178 ptlrpc_req_finished(req); 4f76f0ec wang di 2016-08-19 1179 CDEBUG(D_CACHE, "read %d/%d pages\n", rd_pgs, npages); 4f76f0ec wang di 2016-08-19 1180 for (i = 1; i < npages; i++) { 4f76f0ec wang di 2016-08-19 1181 unsigned long offset; 4f76f0ec wang di 2016-08-19 1182 __u64 hash; 4f76f0ec wang di 2016-08-19 1183 int ret; 4f76f0ec wang di 2016-08-19 1184 4f76f0ec wang di 2016-08-19 1185 page = page_pool[i]; 4f76f0ec wang di 2016-08-19 1186 4f76f0ec wang di 2016-08-19 1187 if (rc < 0 || i >= rd_pgs) { 4f76f0ec wang di 2016-08-19 1188 put_page(page); 4f76f0ec wang di 2016-08-19 1189 continue; 4f76f0ec wang di 2016-08-19 1190 } 4f76f0ec wang di 2016-08-19 1191 4f76f0ec wang di 2016-08-19 1192 SetPageUptodate(page); 4f76f0ec wang di 2016-08-19 1193 4f76f0ec wang di 2016-08-19 1194 dp = kmap(page); 4f76f0ec wang di 2016-08-19 1195 hash = le64_to_cpu(dp->ldp_hash_start); 4f76f0ec wang di 2016-08-19 1196 kunmap(page); 4f76f0ec wang di 2016-08-19 1197 4f76f0ec wang di 2016-08-19 1198 offset = hash_x_index(hash, rp->rp_hash64); 4f76f0ec wang di 2016-08-19 1199 4f76f0ec wang di 2016-08-19 @1200 prefetchw(&page->flags); 4f76f0ec wang di 2016-08-19 1201 ret = add_to_page_cache_lru(page, inode->i_mapping, offset, 4f76f0ec wang di 2016-08-19 1202 GFP_KERNEL); 4f76f0ec wang di 2016-08-19 1203 if (!ret) 4f76f0ec wang di 2016-08-19 1204 unlock_page(page); 4f76f0ec wang di 2016-08-19 1205 else 4f76f0ec wang di 2016-08-19 1206 CDEBUG(D_VFSTRACE, "page %lu add to page cache failed: rc = %d\n", 4f76f0ec wang di 2016-08-19 1207 offset, ret); 4f76f0ec wang di 2016-08-19 1208 put_page(page); 4f76f0ec wang di 2016-08-19 1209 } 4f76f0ec wang di 2016-08-19 1210 4f76f0ec wang di 2016-08-19 1211 if (page_pool != &page0) 4f76f0ec wang di 2016-08-19 1212 kfree(page_pool); 4f76f0ec wang di 2016-08-19 1213 4f76f0ec wang di 2016-08-19 1214 return rc; 4f76f0ec wang di 2016-08-19 1215 } 4f76f0ec wang di 2016-08-19 1216 :::::: The code at line 1200 was first introduced by commit :::::: 4f76f0ec093c2f9ef049495c78d486bfb48e4de0 staging: lustre: llite: move dir cache to MDC layer :::::: TO: wang di <di.wang@xxxxxxxxx> :::::: CC: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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