On 12/18/25 05:45, Jan Beulich wrote: > Calling a function with 10 arguments is inefficient on many architectures: > x86-64 allows for up to 6 register parameters, Arm64 for up to 8. > Everything else needs passing on the stack, i.e. forcing the compiler to > emit stack manipulation insns at every call site. > > Shrinks generated code on x86 (with gcc15) by over 250 bytes. The gains on > Arm64 are a little less. > > Signed-off-by: Jan Beulich <[email protected]>
Reviewed-by: Stewart Hildebrand <[email protected]> > --- > Why is it, btw, that the declarations live in xen/vpci.h? These functions > aren't supposed to be called from outside xen/drivers/vpci/, are they? In > which case their decls may better live in a private header? You have a good point, they could very well live in a private header IMO.
