On a kernel config with ALTIVEC=y and PPC_FPU not set/enabled, there is a build error:
drivers/cpufreq/pmac32-cpufreq.c:262:2: error: implicit declaration of function 'enable_kernel_fp' [-Werror,-Wimplicit-function-declaration] enable_kernel_fp(); so add a stub function for that when PPC_FPU is not set. Signed-off-by: Randy Dunlap <rdun...@infradead.org> Reported-by: kernel test robot <l...@intel.com> Cc: Michael Ellerman <m...@ellerman.id.au> Cc: linuxppc-dev@lists.ozlabs.org Cc: Christophe Leroy <christophe.le...@csgroup.eu> Cc: Segher Boessenkool <seg...@kernel.crashing.org> Cc: l...@intel.com --- arch/powerpc/include/asm/switch_to.h | 1 + 1 file changed, 1 insertion(+) --- linux-next-20210416.orig/arch/powerpc/include/asm/switch_to.h +++ linux-next-20210416/arch/powerpc/include/asm/switch_to.h @@ -48,6 +48,7 @@ static inline void disable_kernel_fp(voi #else static inline void save_fpu(struct task_struct *t) { } static inline void flush_fp_to_thread(struct task_struct *t) { } +static inline void enable_kernel_fp(void) { } #endif #ifdef CONFIG_ALTIVEC