Use __counted_by for extra runtime analysis. Move assignment to after
allocation as required by __counted_by.
I don't understand this statement, nr_ranges was previously set after
the allocation of phys_vec. The only reordering was relative to
setting vdev, but that appears arbitrary.
Yes that one. My understanding is __counted_by mandates immediate
assignment after allocation. Otherwise UBSAN complains.
Not true. However, it's best practice.
The requirement is that the _counter_ must be initialized before
the first reference to the flexible-array member.
OTOH kzalloc_flex automatically sets it for GCC15 and above. Useful to
That's what the "it's best practice." comment above alludes to.
-Gustavo
