Avoid SeqCst or static mut in mach_timebase_info cache
Avoid SeqCst or static mut in mach_timebase_info cache

aidancully/rust,graydon/rust,graydon/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust,aidancully/rust,graydon/rust,aidancully/rust