On Mon, Aug 20, 2012 at 10:05:46AM +0100, Russell King - ARM Linux wrote: > On Mon, Aug 20, 2012 at 10:57:34AM +0200, Lothar Waßmann wrote: > > Hi, > > > > Uwe Kleine-König writes: > > > Hello, > > > > > > while triggering a reboot via sysrq on an ARM machine I saw a "BUG: > > > sleeping function called from invalid context" message (details below). > > > The reason is that the sysrq handler is calling the restart hook in irq > > > context. So what should be done about that? The obvious possiblities > > > are: > > > > > > a) ignore the problem as it won't result in problems (and maybe somehow > > > silence the warnign); or > > > b) make the restart hook atomic; or > > > c) assert sysrq not calling the hook in atomic mode > > > > > > What do you think? > > > > > This has been discussed earlier (with your participation) with 'a)' > > being the conclusion. > > http://lists.infradead.org/pipermail/linux-arm-kernel/2010-December/033877.html > > Except if you look at the backtrace, it seems that it fails to restart. > There are two attempts there at making it restart so the first could > not have succeeded. Just for the log: The restart works ok. Best regards Uwe -- Pengutronix e.K. | Uwe Kleine-König | Industrial Linux Solutions | http://www.pengutronix.de/ | -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
