On Wed, Dec 12, 2018 at 12:43:08AM +0100, Borislav Petkov wrote: > > And other code in this file uses "c" for clobber. > > Ok.
Except that clobbers need to be full register names: ./arch/x86/include/asm/msr.h: In function ‘do_hres’: ./arch/x86/include/asm/msr.h:236:2: error: unknown register name ‘c’ in ‘asm’ asm volatile(ALTERNATIVE_3("rdtsc", ^~~ ... -- Regards/Gruss, Boris. Good mailing practices for 400: avoid top-posting and trim the reply.