On Fri, Nov 18 2022 at 07:57, Kevin Tian wrote: >> From: Thomas Gleixner <tglx@xxxxxxxxxxxxx> >> Sent: Friday, November 11, 2022 9:57 PM >> >> +/* Invalid XA index which is outside of any searchable range */ >> +#define MSI_XA_MAX_INDEX (ULONG_MAX - 1) >> +#define MSI_XA_DOMAIN_SIZE (MSI_MAX_INDEX + 1) >> + > > Out of curiosity. Other places treat MSI_MAX_INDEX - 1 as the upper > bound of a valid range. This size definition here implies that the last ID > is wasted for every domain. Is it intended? Bah. MSI_MAX_INDEX is inclusive so the size must be + 1. I obviously missed that in the other places which use it as upper bound. Not that it matters, but yes. Let me fix that.
