From: Ingo Molnar Date: Wed, 28 Jan 2026 10:35:20 +0000 (+0100) Subject: x86/hyperv: Fix smp_ops build failure on UP kernels X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ac059ae422d7d05ed9d62970a30fa3b95870b967;p=thirdparty%2Flinux.git x86/hyperv: Fix smp_ops build failure on UP kernels CI testing found this build failure: arch/x86/hyperv/hv_crash.c:631:9: error: ‘smp_ops’ undeclared (first use in this function) And I bisected it back to the initial commit that enabled this feature: 77c860d2dbb72d1f3c6a2e882a07d19eca399db5 is the first bad commit commit 77c860d2dbb72d1f3c6a2e882a07d19eca399db5 (HEAD) Author: Mukesh Rathor Date: Mon Oct 6 15:42:08 2025 -0700 x86/hyperv: Enable build of hypervisor crashdump collection files Hyperv should probably be limited to SMP kernels, as nobody appears to be testing it on UP kernels. Until then, fix the smp_ops assumption. Build tested only. Fixes: 77c860d2dbb72 ("x86/hyperv: Enable build of hypervisor crashdump collection files") Cc: Mukesh Rathor Cc: Wei Liu Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar --- diff --git a/arch/x86/hyperv/hv_crash.c b/arch/x86/hyperv/hv_crash.c index c0e22921ace1a..a78e4fed57203 100644 --- a/arch/x86/hyperv/hv_crash.c +++ b/arch/x86/hyperv/hv_crash.c @@ -628,7 +628,9 @@ void hv_root_crash_init(void) if (rc) goto err_out; +#ifdef CONFIG_SMP smp_ops.crash_stop_other_cpus = hv_crash_stop_other_cpus; +#endif crash_kexec_post_notifiers = true; hv_crash_enabled = true;