What is the easiest way to disable all interrupts?

[sd]

Using the nRF51822. I have a routine that should never be interrupted. What is the easiest way to disable all interrupts, and then re-enabling them?

[felixk]

Hi Ole, What about register that changes on read, like the EVENT_READY flag for SPI ? I seem to be having problem with that, and the problem seems to go away if I use a timeout instead of just while(SPI->EVENT_READY == 0);

Yours, Felix