Hi, On Sat, Sep 19, 2009 at 11:17 AM, Chetan Nanda <chetannanda@xxxxxxxxx> wrote: > Hi, > > I have small doubt regarding copy_to_user/copy_from_user macros: > > -Can these macros be used in interrupt context.. what if page belong to user > address is not in memory (not loaded/swapped out)? If you look for copy_to_user definition in function description is written: User context only. This function may sleep. So no you can't use it in interrupt routines. > -If we use copy_to_user in interrupt context, then how can this be assure > that data is copied into correct process buffer? > As at a time of interrupt it can't be guaranteed that intended user process > is the current process running. > > These may be silly question but create some confusion for me.... > > Thanks, > Chetan Nanda > good luck, Marek -- as simple and primitive as possible ------------------------------------------------- Marek Belisko - OPEN-NANDRA Ruska Nova Ves 219 | Presov, 08005 Slovak Republic Tel: +421 915 052 184 skype: marekwhite icq: 290551086 web: http://open-nandra.com -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
