Rollup of 6 pull requests#91799

Merged

bors merged 34 commits intorust-lang:masterfrom

matthiaskrgr:rollup-b38xx6i

Dec 11, 2021

Commits on Nov 9, 2021

Commits on Dec 4, 2021

Make `Borrow` and `BorrowMut` impls `const`
lilasta
committed

Commits on Dec 5, 2021

Add spin_loop hint for RISC-V architecture
luojia65
committed

Commits on Dec 6, 2021

Add tracking issue number
mbartlett21
authored

Commits on Dec 10, 2021

Commits on Dec 11, 2021

Rollup merge of #83174 - camelid:borrow-help, r=oli-obk
matthiaskrgr
authored
Rollup merge of #89734 - estebank:issue-72312, r=nikomatsakis
matthiaskrgr
authored
Rollup merge of #90270 - woppopo:const_borrow_trait, r=dtolnay
matthiaskrgr
authored
Rollup merge of #90741 - mbartlett21:patch-4, r=dtolnay
matthiaskrgr
authored
Rollup merge of #91548 - luojia65:hint-spin-loop-riscv, r=Amanieu
matthiaskrgr
authored
Rollup merge of #91721 - danielhenrymantilla:patch-1, r=joshtriplett
matthiaskrgr
authored