On Tue, 26 Mar 2013, Thomas Gleixner wrote: > On Tue, 26 Mar 2013, Sebastian Andrzej Siewior wrote: > > > * Thomas Gleixner | 2013-03-26 22:07:45 [+0100]: > > > > >> that means it should trigger on mainline as well. > > > > > >No. It won't. Mainline uses a spinlock which gets converted to a > > >sleeping spinlock on rt. > > > > > > (rt_spin_lock+0x30/0x64) from (clk_get_rate+0x30/0x54) > > > > This is true but this spinlock in only available in the OOT code > > Gregoire Gentil pointed out ([0]). In mainline we have a mutex in > > drivers/clk/clk.c and this is what my omap4 blaze is using. > > > > [0] http://dev.omapzoom.org/?p=integration/kernel-ubuntu.git;a=blob;f=arch/arm/plat-omap/clock.c;h=8c0e8fe2c5c51673e41e4304194d922dbfaedf38;hb=3e1c9f139425663ceee48f92e8d3f23158580334 > > Yeah, it's that way in mainline as well. I meant, that the mutex is taken. So yes, this will cause a warning in !RT too. -- 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
