On Tue, 10 Dec 2019, Arnd Bergmann wrote:
When CONFIG_SYSFS is disabled, but CONFIG_HOTPLUG_SMT is enabled, the kernel fails to link:
I wonder where such kernels are running ... or I rather don't :)
arch/x86/power/cpu.o: In function `hibernate_resume_nonboot_cpu_disable': (.text+0x38d): undefined reference to `cpuhp_smt_enable' arch/x86/power/hibernate.o: In function `arch_resume_nosmt': hibernate.c:(.text+0x291): undefined reference to `cpuhp_smt_enable' hibernate.c:(.text+0x29c): undefined reference to `cpuhp_smt_disable'
Move the exported functions out of the #ifdef section into its own with the correct conditions.
The patch that caused this is marked for stable backports, so this one may need to be backported as well.
Fixes: ec527c318036 ("x86/power: Fix 'nosmt' vs hibernation triple fault during resume")
Reviewed-by: Jiri Kosina jkosina@suse.cz
Thanks for fixing my oversight.