tree: git://git.infradead.org/users/hch/misc.git swiotlb-fix head: b312f891c5bef58d2d3b287fd3ac90abe1588192 commit: 4a32ebd5ef3f301848088178b7452a4ec9c9ccea [9/10] wip config: ia64-randconfig-r011-20210510 (attached as .config) compiler: ia64-linux-gcc (GCC) 9.3.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git remote add hch-misc git://git.infradead.org/users/hch/misc.git git fetch --no-tags hch-misc swiotlb-fix git checkout 4a32ebd5ef3f301848088178b7452a4ec9c9ccea # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross W=1 ARCH=ia64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): In file included from arch/ia64/include/asm/pgtable.h:154, from include/linux/pgtable.h:6, from include/linux/mm.h:33, from include/linux/scatterlist.h:8, from include/linux/dma-mapping.h:10, from include/linux/dma-direct.h:9, from kernel/dma/swiotlb.c:24: arch/ia64/include/asm/mmu_context.h: In function 'reload_context': arch/ia64/include/asm/mmu_context.h:127:41: warning: variable 'old_rr4' set but not used [-Wunused-but-set-variable] 127 | unsigned long rr0, rr1, rr2, rr3, rr4, old_rr4; | ^~~~~~~ In file included from include/trace/events/swiotlb.h:8, from include/trace/define_trace.h:95, from include/trace/events/swiotlb.h:49, from kernel/dma/swiotlb.c:51: include/linux/tracepoint.h: At top level: 575 | #endif /* ifdef TRACE_EVENT (see note above) */ | In file included from include/trace/events/swiotlb.h:49, from include/trace/define_trace.h:95, from include/trace/events/swiotlb.h:49, from kernel/dma/swiotlb.c:51: 135 | #endif /* CREATE_TRACE_POINTS */ | In file included from kernel/dma/swiotlb.c:51: 10 | TRACE_EVENT(swiotlb_bounced, | ^~~~~~~~~~~ In file included from include/trace/define_trace.h:95, from include/trace/events/swiotlb.h:49, from kernel/dma/swiotlb.c:51: 10 | TRACE_EVENT(swiotlb_bounced, | ^ | ; 64 | bool swiotlb_force; | ^~~~~~~~~~~~~ In file included from include/linux/dma-direct.h:13, from kernel/dma/swiotlb.c:24: include/linux/swiotlb.h:63:27: note: previous declaration of 'swiotlb_force' was here 63 | extern enum swiotlb_force swiotlb_force; | ^~~~~~~~~~~~~ kernel/dma/swiotlb.c: In function 'swiotlb_map': 630 | trace_swiotlb_bounced(dev, phys_to_dma(dev, paddr), size, | ^~~~~~~~~~~~~~~~~~~~~ | swiotlb_bounce cc1: some warnings being treated as errors vim +/TRACE_EVENT +575 include/linux/tracepoint.h d5b5f391d434c5 Peter Zijlstra 2013-11-14 559 163363455b42a1 Yafang Shao 2019-03-26 560 #define DECLARE_EVENT_NOP(name, proto, args) \ 163363455b42a1 Yafang Shao 2019-03-26 561 static inline void trace_##name(proto) \ 163363455b42a1 Yafang Shao 2019-03-26 562 { } \ 163363455b42a1 Yafang Shao 2019-03-26 563 static inline bool trace_##name##_enabled(void) \ 163363455b42a1 Yafang Shao 2019-03-26 564 { \ 163363455b42a1 Yafang Shao 2019-03-26 565 return false; \ 163363455b42a1 Yafang Shao 2019-03-26 566 } 163363455b42a1 Yafang Shao 2019-03-26 567 163363455b42a1 Yafang Shao 2019-03-26 568 #define TRACE_EVENT_NOP(name, proto, args, struct, assign, print) \ 163363455b42a1 Yafang Shao 2019-03-26 569 DECLARE_EVENT_NOP(name, PARAMS(proto), PARAMS(args)) 163363455b42a1 Yafang Shao 2019-03-26 570 163363455b42a1 Yafang Shao 2019-03-26 571 #define DECLARE_EVENT_CLASS_NOP(name, proto, args, tstruct, assign, print) 163363455b42a1 Yafang Shao 2019-03-26 572 #define DEFINE_EVENT_NOP(template, name, proto, args) \ 163363455b42a1 Yafang Shao 2019-03-26 573 DECLARE_EVENT_NOP(name, PARAMS(proto), PARAMS(args)) 163363455b42a1 Yafang Shao 2019-03-26 574 7cb2e3ee2aeec5 Steven Rostedt 2009-08-26 @575 #endif /* ifdef TRACE_EVENT (see note above) */ :::::: The code at line 575 was first introduced by commit :::::: 7cb2e3ee2aeec5b83ecadba929a2dc575dd4008f tracing: add comments to explain TRACE_EVENT out of protection :::::: TO: Steven Rostedt <srostedt(a)redhat.com&gt; :::::: CC: Steven Rostedt <rostedt(a)goodmis.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org