Messages in this thread | | | Subject | atomic copy_from_user? | From | Albert Cahalan <> | Date | 21 Dec 2003 19:48:20 -0500 |
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Surely I'm not the only one wanting such a beast...?
>From some naughty place in the code where might_sleep would trigger, I'd like to read from user memory. I'll pretty much assume that mlockall() has been called. Suppose that "current" is correct as well. I'd just use a pointer directly, except that:
a. it isn't OK for the 4g/4g feature, s390, or sparc64 b. it causes the "sparse" type checker to complain c. it will oops or worse if the user screwed up
If the page is swapped out, I want a failed copy.
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