>>> On 30.06.15 at 16:48, <tleng...@novetta.com> wrote: >> > --- a/xen/include/asm-x86/domain.h > >> >> +++ b/xen/include/asm-x86/domain.h >> >> @@ -342,13 +342,15 @@ struct arch_domain >> >> >> >> /* Monitor options */ >> >> struct { >> >> - uint16_t write_ctrlreg_enabled : 4; >> >> - uint16_t write_ctrlreg_sync : 4; >> >> - uint16_t write_ctrlreg_onchangeonly : 4; >> >> - uint16_t mov_to_msr_enabled : 1; >> >> - uint16_t mov_to_msr_extended : 1; >> >> - uint16_t singlestep_enabled : 1; >> >> - uint16_t software_breakpoint_enabled : 1; >> >> + uint32_t write_ctrlreg_enabled : 4; >> >> + uint32_t write_ctrlreg_sync : 4; >> >> + uint32_t write_ctrlreg_onchangeonly : 4; >> >> + uint32_t mov_to_msr_enabled : 1; >> >> + uint32_t mov_to_msr_extended : 1; >> >> + uint32_t singlestep_enabled : 1; >> >> + uint32_t software_breakpoint_enabled : 1; >> >> + uint32_t request_enabled : 1; >> >> + uint32_t request_sync : 1; >> > >> > Can you please switch to plain unsigned int if you already have to >> > touch this? There's no reason I can see to use a fixed width integer >> > type here. >> >> Ack, will make it plain int. > > > IMHO having it fix-width is easier to read when adding new elements to see > how many bits we have left free. I would not want this changed unless there > is a clear benefit to doing so.
I can't see what benefit using fixed widht types here is: Best demonstrated with uint64_t, gcc doesn't honor the type of the field anyway. And hence counting the number of left bits (with some unknown definition of "left") is quite pointless too - it's an internal structure, and when a new bit field needs to be added, it doesn't really matter whether it grows the structure (at least no more than any other field addition). Bottom line - no fixed width types when not really warranted, please. Jan _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel