tree: https://git.kernel.org/pub/scm/linux/kernel/git/jfern/linux.git coresched head: 8d250115a6b0e2316cb268213dccfeae35cc61ab commit: 52c14d9ef1bc109c3ad803273e136d994cd60004 [23/38] entry/idle: Enter and exit kernel protection during idle entry and exit config: i386-randconfig-a016-20201111 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/jfern/linux.git/commit/?i... git remote add jfern https://git.kernel.org/pub/scm/linux/kernel/git/jfern/linux.git git fetch --no-tags jfern coresched git checkout 52c14d9ef1bc109c3ad803273e136d994cd60004 # save the attached .config to linux build tree make W=1 ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): In file included from include/linux/entry-kvm.h:5, from kernel/entry/kvm.c:3: include/linux/entry-common.h:468:1: error: version control conflict marker in file 468 | >>>>>>> 1e7589ad08c6 (entry/idle: Enter and exit kernel protection during idle entry and exit) | ^~~~~~~ include/linux/entry-common.h:468:9: error: invalid suffix "ad08c6" on floating constant 468 | >>>>>>> 1e7589ad08c6 (entry/idle: Enter and exit kernel protection during idle entry and exit) | ^~~~~~~~~~~~ In file included from kernel/entry/kvm.c:3: 29 | static inline int arch_xfer_to_guest_mode_handle_work(struct kvm_vcpu *vcpu, | ^~~~~~~~ include/linux/entry-kvm.h:33:62: warning: 'struct kvm_vcpu' declared inside parameter list will not be visible outside of this definition or declaration 33 | static inline int arch_xfer_to_guest_mode_handle_work(struct kvm_vcpu *vcpu, | ^~~~~~~~ include/linux/entry-kvm.h:33:19: error: conflicting types for 'arch_xfer_to_guest_mode_handle_work' 33 | static inline int arch_xfer_to_guest_mode_handle_work(struct kvm_vcpu *vcpu, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/entry-kvm.h:29:19: note: previous declaration of 'arch_xfer_to_guest_mode_handle_work' was here 29 | static inline int arch_xfer_to_guest_mode_handle_work(struct kvm_vcpu *vcpu, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/entry-kvm.h:47:43: warning: 'struct kvm_vcpu' declared inside parameter list will not be visible outside of this definition or declaration 47 | int xfer_to_guest_mode_handle_work(struct kvm_vcpu *vcpu); | ^~~~~~~~ kernel/entry/kvm.c: In function 'xfer_to_guest_mode_work': kernel/entry/kvm.c:25:45: error: passing argument 1 of 'arch_xfer_to_guest_mode_handle_work' from incompatible pointer type [-Werror=incompatible-pointer-types] 25 | ret = arch_xfer_to_guest_mode_handle_work(vcpu, ti_work); | ^~~~ | | | struct kvm_vcpu * In file included from kernel/entry/kvm.c:3: include/linux/entry-kvm.h:33:72: note: expected 'struct kvm_vcpu *' but argument is of type 'struct kvm_vcpu *' 33 | static inline int arch_xfer_to_guest_mode_handle_work(struct kvm_vcpu *vcpu, | ~~~~~~~~~~~~~~~~~^~~~ kernel/entry/kvm.c: At top level: kernel/entry/kvm.c:34:5: error: conflicting types for 'xfer_to_guest_mode_handle_work' 34 | int xfer_to_guest_mode_handle_work(struct kvm_vcpu *vcpu) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from kernel/entry/kvm.c:3: include/linux/entry-kvm.h:47:5: note: previous declaration of 'xfer_to_guest_mode_handle_work' was here 47 | int xfer_to_guest_mode_handle_work(struct kvm_vcpu *vcpu); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from include/linux/linkage.h:7, from include/linux/kernel.h:8, from arch/x86/include/asm/percpu.h:27, from arch/x86/include/asm/current.h:6, from include/linux/sched.h:12, from include/linux/tracehook.h:46, from include/linux/entry-common.h:5, from include/linux/entry-kvm.h:5, from kernel/entry/kvm.c:3: kernel/entry/kvm.c:52:19: error: conflicting types for 'xfer_to_guest_mode_handle_work' 52 | EXPORT_SYMBOL_GPL(xfer_to_guest_mode_handle_work); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/export.h:98:21: note: in definition of macro '___EXPORT_SYMBOL' 98 | extern typeof(sym) sym; \ | ^~~ include/linux/export.h:155:34: note: in expansion of macro '__EXPORT_SYMBOL' 155 | #define _EXPORT_SYMBOL(sym, sec) __EXPORT_SYMBOL(sym, sec, "") | ^~~~~~~~~~~~~~~ include/linux/export.h:159:33: note: in expansion of macro '_EXPORT_SYMBOL' 159 | #define EXPORT_SYMBOL_GPL(sym) _EXPORT_SYMBOL(sym, "_gpl") | ^~~~~~~~~~~~~~ kernel/entry/kvm.c:52:1: note: in expansion of macro 'EXPORT_SYMBOL_GPL' 52 | EXPORT_SYMBOL_GPL(xfer_to_guest_mode_handle_work); | ^~~~~~~~~~~~~~~~~ In file included from kernel/entry/kvm.c:3: include/linux/entry-kvm.h:47:5: note: previous declaration of 'xfer_to_guest_mode_handle_work' was here 47 | int xfer_to_guest_mode_handle_work(struct kvm_vcpu *vcpu); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +29 include/linux/entry-kvm.h 935ace2fb5cc49a Thomas Gleixner 2020-07-22 19 935ace2fb5cc49a Thomas Gleixner 2020-07-22 20 /** 935ace2fb5cc49a Thomas Gleixner 2020-07-22 21 * arch_xfer_to_guest_mode_handle_work - Architecture specific xfer to guest 935ace2fb5cc49a Thomas Gleixner 2020-07-22 22 * mode work handling function. 935ace2fb5cc49a Thomas Gleixner 2020-07-22 23 * @vcpu: Pointer to current's VCPU data 935ace2fb5cc49a Thomas Gleixner 2020-07-22 24 * @ti_work: Cached TIF flags gathered in xfer_to_guest_mode_handle_work() 935ace2fb5cc49a Thomas Gleixner 2020-07-22 25 * 935ace2fb5cc49a Thomas Gleixner 2020-07-22 26 * Invoked from xfer_to_guest_mode_handle_work(). Defaults to NOOP. Can be 935ace2fb5cc49a Thomas Gleixner 2020-07-22 27 * replaced by architecture specific code. 935ace2fb5cc49a Thomas Gleixner 2020-07-22 28 */ 935ace2fb5cc49a Thomas Gleixner 2020-07-22 @29 static inline int arch_xfer_to_guest_mode_handle_work(struct kvm_vcpu *vcpu, 935ace2fb5cc49a Thomas Gleixner 2020-07-22 30 unsigned long ti_work); 935ace2fb5cc49a Thomas Gleixner 2020-07-22 31 :::::: The code at line 29 was first introduced by commit :::::: 935ace2fb5cc49ae88bd1f1735ddc51cdc2ebfb3 entry: Provide infrastructure for work before transitioning to guest mode :::::: TO: Thomas Gleixner <tglx(a)linutronix.de&gt; :::::: CC: Thomas Gleixner <tglx(a)linutronix.de&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org