Hi Claudio, [auto build test ERROR on kvm/linux-next] [also build test ERROR on v4.12 next-20170711] [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/Claudio-Imbrenda/KVM-trigger-uevents-when-creating-or-destroying-a-VM/20170712-023748 base: https://git.kernel.org/pub/scm/virt/kvm/kvm.git linux-next config: x86_64-allyesdebian (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=x86_64 All errors (new ones prefixed by >>): arch/x86/kvm/../../../virt/kvm/kvm_main.c: In function 'kvm_uevent_notify_change': >> arch/x86/kvm/../../../virt/kvm/kvm_main.c:3892:24: error: 'struct mm_struct' has no member named 'owner' if (kvm->mm && kvm->mm->owner) { ^~ arch/x86/kvm/../../../virt/kvm/kvm_main.c:3893:40: error: 'struct mm_struct' has no member named 'owner' add_uevent_var(env, "PID=%d", kvm->mm->owner->pid); ^~ vim +3892 arch/x86/kvm/../../../virt/kvm/kvm_main.c 3864 3865 static void kvm_uevent_notify_change(unsigned int type, struct kvm *kvm) 3866 { 3867 struct kobj_uevent_env *env; 3868 char *tmp, *pathbuf = NULL; 3869 unsigned long long created, active; 3870 3871 if (!kvm_dev.this_device || !kvm) 3872 return; 3873 3874 spin_lock(&kvm_lock); 3875 if (type == KVM_EVENT_CREATE_VM) { 3876 kvm_createvm_count++; 3877 kvm_active_vms++; 3878 } else if (type == KVM_EVENT_DESTROY_VM) { 3879 kvm_active_vms--; 3880 } 3881 created = kvm_createvm_count; 3882 active = kvm_active_vms; 3883 spin_unlock(&kvm_lock); 3884 3885 env = kzalloc(sizeof(*env), GFP_KERNEL); 3886 if (!env) 3887 return; 3888 3889 add_uevent_var(env, "CREATED=%llu", created); 3890 add_uevent_var(env, "COUNT=%llu", active); 3891 > 3892 if (kvm->mm && kvm->mm->owner) { 3893 add_uevent_var(env, "PID=%d", kvm->mm->owner->pid); 3894 } else if (kvm->debugfs_dentry) { 3895 char p[ITOA_MAX_LEN]; 3896 3897 snprintf(p, sizeof(p), "%s", kvm->debugfs_dentry->d_name.name); 3898 tmp = strchrnul(p + 1, '-'); 3899 *tmp = '\0'; 3900 add_uevent_var(env, "PID=%s", p); 3901 } 3902 3903 if (type == KVM_EVENT_CREATE_VM) 3904 add_uevent_var(env, "EVENT=create"); 3905 else if (type == KVM_EVENT_DESTROY_VM) 3906 add_uevent_var(env, "EVENT=destroy"); 3907 3908 if (kvm->debugfs_dentry) { 3909 pathbuf = kmalloc(PATH_MAX, GFP_KERNEL); 3910 if (pathbuf) { 3911 /* sizeof counts the final '\0' */ 3912 int len = sizeof("STATS_PATH=") - 1; 3913 const char *pvar = "STATS_PATH="; 3914 3915 tmp = dentry_path_raw(kvm->debugfs_dentry, 3916 pathbuf + len, 3917 PATH_MAX - len); 3918 if (!IS_ERR(tmp)) { 3919 memcpy(tmp - len, pvar, len); 3920 env->envp[env->envp_idx++] = tmp - len; 3921 } 3922 } 3923 } 3924 /* no need for checks, since we are adding at most only 5 keys */ 3925 env->envp[env->envp_idx++] = NULL; 3926 kobject_uevent_env(&kvm_dev.this_device->kobj, KOBJ_CHANGE, env->envp); 3927 kfree(env); 3928 kfree(pathbuf); 3929 } 3930 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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