Hi Stephen, [auto build test WARNING on clk/clk-next] [also build test WARNING on v4.13-rc2 next-20170728] [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/Stephen-Boyd/clk-Remove-recursion-in-clk_core_-prepare-enable/20170728-114840 base: https://git.kernel.org/pub/scm/linux/kernel/git/clk/linux.git clk-next config: x86_64-randconfig-v0-07291446 (attached as .config) compiler: gcc-4.4 (Debian 4.4.7-8) 4.4.7 reproduce: # save the attached .config to linux build tree make ARCH=x86_64 All warnings (new ones prefixed by >>): drivers//clk/clk.c: In function 'clk_core_enable': >> drivers//clk/clk.c:658: warning: unused variable 'prev' vim +/prev +658 drivers//clk/clk.c 654 655 static int clk_core_enable(struct clk_core *core) 656 { 657 int ret = 0; > 658 struct clk_core *tmp, *parent, *prev; 659 LIST_HEAD(head); 660 661 lockdep_assert_held(&enable_lock); 662 663 while (core) { 664 list_add(&core->enable_list, &head); 665 /* Stop once we see a clk that is already enabled */ 666 if (core->enable_count) 667 break; 668 core = core->parent; 669 } 670 671 list_for_each_entry_safe(core, tmp, &head, enable_list) { 672 list_del_init(&core->enable_list); 673 674 if (WARN_ON(core->prepare_count == 0)) { 675 ret = -ESHUTDOWN; 676 goto err; 677 } 678 679 if (core->enable_count == 0) { 680 trace_clk_enable_rcuidle(core); 681 682 if (core->ops->enable) 683 ret = core->ops->enable(core->hw); 684 685 trace_clk_enable_complete_rcuidle(core); 686 687 if (ret) 688 goto err; 689 } 690 691 core->enable_count++; 692 } 693 694 return 0; 695 err: 696 parent = core->parent; 697 list_for_each_entry_safe_continue(core, tmp, &head, enable_list) 698 list_del_init(&core->enable_list); 699 clk_core_disable(parent); 700 return ret; 701 } 702 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
.config.gz
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