Re: [PATCH v3 03/23] arm64: Make cpu_logical_map() take unsigned int

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Thu, Nov 26, 2020 at 05:28:38PM +0000, Mark Rutland wrote:
> On Thu, Nov 26, 2020 at 03:54:01PM +0000, David Brazdil wrote:
> > CPU index should never be negative. Change the signature of
> > (set_)cpu_logical_map to take an unsigned int.
> > 
> > Signed-off-by: David Brazdil <dbrazdil@xxxxxxxxxx>
> 
> Is there a function problem here, or is this just cleanup from
> inspection?
> 
> Core code including the cpuhp_*() callbacks uses an int, so if there's a
> strong justification to change this, it suggests there's some treewide
> cleanup that should be done.
> 
> I don't have strong feelings on the matter, but I'd like to understand
> the rationale.

Yeah, it's a mess. Marc and I felt that using a uint was less error-prone wrt
bounds checks. If this gets an int, it still works and only checking the upper
bound is required. Does that make sense?

David

_______________________________________________
kvmarm mailing list
kvmarm@xxxxxxxxxxxxxxxxxxxxx
https://lists.cs.columbia.edu/mailman/listinfo/kvmarm



[Index of Archives]     [Linux KVM]     [Spice Development]     [Libvirt]     [Libvirt Users]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux