Messages in this thread | | | Date | Sat, 16 Oct 1999 00:35:35 +0200 | From | Jens Axboe <> | Subject | Re: copy_to_user in modules ? |
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On Fri, Oct 15 1999, Kesava Narasimhan wrote: > Hi, > I believe that we are advised to use copy_to_user() for converting to user > space. But since this is not exported, are we supposed to export it(in > ksyms.c), rebuild the kernel and then use it ? Suppose I want to write device > drivers, the probability is very high that I will have it as a module and the > probability is even higher that I'll have to use functions like > copy_to_user/copy_from_user or the obsolete versions memcpy_tofs/memcpy_fromfs > and these aren't exported. Looks like linux by nature, doesn't encourage > modular devide drivers. > > Am I right or am I missing something ? > > Forgive me if this a stupid question.
You are missing something - look at the copy_to_user define in asm/uacess.h. Of course copy_to/from_user works within a module.
-- * Jens Axboe <axboe@image.dk> * Linux CD-ROM Maintainer * http://www.kernel.dk
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