The function flag_is_changeable_p() is used in: - have_cpuid_p() for its CONFIG_X86_32 definition - identify_cpu_without_cpuid() within its CONFIG_X86_32 ifdef-block So, there is no need to define flag_is_changeable_p() if !CONFIG_X86_32. Simply remove this needless definition. This was discovered with make CC=clang W=1: arch/x86/kernel/cpu/common.c:283:19: warning: unused function 'flag_is_changeable_p' [-Wunused-function] Signed-off-by: Lukas Bulwahn <lukas.bulwahn@xxxxxxxxx> --- applies cleanly on current master and next-20201116 Thomas, Boris, please pick this minor non-urgent patch. arch/x86/kernel/cpu/common.c | 4 ---- 1 file changed, 4 deletions(-) diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c index 35ad8480c464..b89dbc7ccb0c 100644 --- a/arch/x86/kernel/cpu/common.c +++ b/arch/x86/kernel/cpu/common.c @@ -280,10 +280,6 @@ static int __init x86_serial_nr_setup(char *s) } __setup("serialnumber", x86_serial_nr_setup); #else -static inline int flag_is_changeable_p(u32 flag) -{ - return 1; -} static inline void squash_the_stupid_serial_number(struct cpuinfo_x86 *c) { } -- 2.17.1