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    Subject[take6 0/3] kevent: Generic event handling mechanism.
    DateWed, 9 Aug 2006 12:02:39 +0400
    FromEvgeniy Polyakov <>
    Generic event handling mechanism.
    
    Changes from 'take5' patchset:
     * removed compilation warnings about unused wariables when lockdep is not turned on
     * do not use internal socket structures, use appropriate (exported) wrappers instead
     * removed default 1 second timeout
     * removed AIO stuff from patchset
    
    Changes from 'take4' patchset:
     * use miscdevice instead of chardevice
     * comments fixes
    
    Changes from 'take3' patchset:
     * removed serializing mutex from kevent_user_wait()
     * moved storage list processing to RCU
     * removed lockdep screaming - all storage locks are initialized in the same function, so it was learned 
    	to differentiate between various cases
     * remove kevent from storage if is marked as broken after callback
     * fixed a typo in mmaped buffer implementation which would end up in wrong index calcualtion 
    
    Changes from 'take2' patchset:
     * split kevent_finish_user() to locked and unlocked variants
     * do not use KEVENT_STAT ifdefs, use inline functions instead
     * use array of callbacks of each type instead of each kevent callback initialization
     * changed name of ukevent guarding lock
     * use only one kevent lock in kevent_user for all hash buckets instead of per-bucket locks
     * do not use kevent_user_ctl structure instead provide needed arguments as syscall parameters
     * various indent cleanups
     * added optimisation, which is aimed to help when a lot of kevents are being copied from userspace
     * mapped buffer (initial) implementation (no userspace yet)
    
    Changes from 'take1' patchset:
     - rebased against 2.6.18-git tree
     - removed ioctl controlling
     - added new syscall kevent_get_events(int fd, unsigned int min_nr, unsigned int max_nr,
    			unsigned int timeout, void __user *buf, unsigned flags)
     - use old syscall kevent_ctl for creation/removing, modification and initial kevent 
    	initialization
     - use mutuxes instead of semaphores
     - added file descriptor check and return error if provided descriptor does not match
    	kevent file operations
     - various indent fixes
     - removed aio_sendfile() declarations.
    
    Thank you.
    
    Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
    
    
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