Hi Remy ! thanks a lot, i will test it on a ARM-v4 with 2.6.23-rc2-rt2 and 2.6.21.5-rt20. I have a application which makes a lot of pthread_mutex_lock/unlock between rt and non-rt tasks with PI. So i will look what happens. thanks fred Am Monday 20 August 2007 schrieben Sie: > Hello Manfred, > > At http://www.spinics.net/lists/arm-kernel/msg42349.html you can find > a patch that will probably work. Due to the lack of proper atomic > instructions on the ARM-v4 core this patch is likely to be the best > possible solution. > > Kind Regards, > > Remy - To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html