Hi Shaohua, [auto build test WARNING on block/for-next] [also build test WARNING on next-20161215] [cannot apply to v4.9] [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/Shaohua-Li/blk-throttle-add-low-limit/20161216-093257 base: https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-next config: i386-randconfig-s0-201650 (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 >>): block/blk-stat.c: In function 'blk_stat_set_issue': >> block/blk-stat.c:243:26: warning: left shift count >= width of type [-Wshift-count-overflow] (blk_capped_size(size) << BLK_STAT_SIZE_SHIFT); ^~ vim +243 block/blk-stat.c 227 queue_for_each_hw_ctx(q, hctx, i) { 228 hctx_for_each_ctx(hctx, ctx, j) { 229 blk_stat_init(&ctx->stat[BLK_STAT_READ]); 230 blk_stat_init(&ctx->stat[BLK_STAT_WRITE]); 231 } 232 } 233 } else { 234 blk_stat_init(&q->rq_stats[BLK_STAT_READ]); 235 blk_stat_init(&q->rq_stats[BLK_STAT_WRITE]); 236 } 237 } 238 239 void blk_stat_set_issue(struct blk_issue_stat *stat, sector_t size) 240 { 241 stat->stat = (stat->stat & BLK_STAT_RES_MASK) | 242 (ktime_to_ns(ktime_get()) & BLK_STAT_TIME_MASK) | > 243 (blk_capped_size(size) << BLK_STAT_SIZE_SHIFT); 244 } 245 246 /* 247 * Enable stat tracking, return whether it was enabled 248 */ 249 bool blk_stat_enable(struct request_queue *q) 250 { 251 if (!test_bit(QUEUE_FLAG_STATS, &q->queue_flags)) { --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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