* what to use (sem/spinlock/etc).... @ 2004-02-16 13:10 RANDAZZO 2004-02-16 15:20 ` Paulo Marques 2004-02-16 15:21 ` Davide Libenzi 0 siblings, 2 replies; 3+ messages in thread From: RANDAZZO @ 2004-02-16 13:10 UTC (permalink / raw) To: linux-kernel I have a register on my hardware that I write to to increment a counter.... ..all I want to do is make sure that only one "task" writes at a time, thus to not corrupt the value...... =EXAMPLE Task A - Write new Value to hardware - Increment Hardware counter - DONE Task B - Write new Value to hardware - Increment Hardware counter - DONE ..This will most likely not occur in a inthandler, but may.... ...I have to make sure that Task A is "done" before "Task B" or any others can do their writing.... ...any opinion of what I should use.... "This message may contain company proprietary information. If you are not the intended recipient, any disclosure, copying, distribution or reliance on the contents of this message is prohibited. If you received this message in error, please delete and notify me." ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: what to use (sem/spinlock/etc).... 2004-02-16 13:10 what to use (sem/spinlock/etc) RANDAZZO @ 2004-02-16 15:20 ` Paulo Marques 2004-02-16 15:21 ` Davide Libenzi 1 sibling, 0 replies; 3+ messages in thread From: Paulo Marques @ 2004-02-16 15:20 UTC (permalink / raw) To: RANDAZZO; +Cc: linux-kernel RANDAZZO@ddc-web.com wrote: > I have a register on my hardware that I write to to increment a counter.... > ..all I want to do is make sure that only one "task" writes at a time, > thus to not corrupt the value...... > > =EXAMPLE > > Task A > - Write new Value to hardware > - Increment Hardware counter > - DONE > > Task B > - Write new Value to hardware > - Increment Hardware counter > - DONE > > ..This will most likely not occur in a inthandler, but may.... > > ...I have to make sure that Task A is "done" before "Task B" or any others > can do their writing.... > > ...any opinion of what I should use.... You can read the "Unreliable Guide To Locking" from Rusty Russell at: http://www.kernel.org/pub/linux/kernel/people/rusty/kernel-locking/ I hope this helps, -- Paulo Marques - www.grupopie.com "In a world without walls and fences who needs windows and gates?" ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: what to use (sem/spinlock/etc).... 2004-02-16 13:10 what to use (sem/spinlock/etc) RANDAZZO 2004-02-16 15:20 ` Paulo Marques @ 2004-02-16 15:21 ` Davide Libenzi 1 sibling, 0 replies; 3+ messages in thread From: Davide Libenzi @ 2004-02-16 15:21 UTC (permalink / raw) To: RANDAZZO; +Cc: linux-kernel On Mon, 16 Feb 2004 RANDAZZO@ddc-web.com wrote: > ...any opinion of what I should use.... I'd say a spindoc: http://www.kernel.org/pub/linux/kernel/people/rusty/kernel-locking/ - Davide ^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2004-02-16 15:22 UTC | newest] Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2004-02-16 13:10 what to use (sem/spinlock/etc) RANDAZZO 2004-02-16 15:20 ` Paulo Marques 2004-02-16 15:21 ` Davide Libenzi
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