Messages in this thread | | | Date | Thu, 25 Feb 1999 09:55:49 -0800 (PST) | From | "B. James Phillippe" <> | Subject | Re: When to save/restore_flags() vs cli/sti() |
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On Thu, 25 Feb 1999, Alan Cox wrote:
> > I'd like to know more details on when exactly it is safe to use the simpler > > cli()/sti() combination over the save_flags()/restore_flags(). > > When you know interrupts were previously enabled and also know nobody will > ever call the function now or in the future with interrupts disabled. In > general I think "don't do it" is the answer.
Okay, I feel better now. I have only ever used save_flags() but I worried I might be being to anal. Does this leave cli()/sti() to only be appropriate within functions that will only be invoked as part of a system call then? Such as device driver open/read/etc?
thanks, -bp -- B. James Phillippe . bryan@terran.org Software Engineer, WGT Inc. . http://www.terran.org/~bryan
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