I was just wondering what the collective wisdom is regarding interrupt enables is.

Specifically if I look at the project in front of me I see a lot of peripheral interrupt enables being turned on and off when shared data is accessed. For instance, a UART enqueues data in an ISR. When the mainline code accesses the same buffer the UART interrupt is turned off. Similar things happen with timers, USB, etc, etc. Assuming that I don't need priorities and nesting, wouldn't it just be simpler to turn off all the interrupts when accessing any shared resource? It's a lot faster to setb/clrb on EA than it is to manipulate the individual interrupt enable bits in some of these peripherals.