On Fri, Jan 27, 2017 at 03:54:59PM -0500, Brian Wrenn wrote: > Hi, Hello again. > I'm trying to get the WLAN wcn36xx driver to load on PRREMPT RT. > > By some fluke I had this module load successfully in the PREEMPT RT > kernel at one point in time, but I have not been able to reproduce > getting to to load since my first trial build. > > I'm patching Linaro 4.4.9 with PREEMPT RT patch 4.4.9-rt17. I've also > manually applied a patch for > kernel/drivers/pinctrl/qcom/pinctrl-msm.c, which replaces uses of > spinlock calls with raw_spinlock calls. > > Here's the dmesg output, which indicates unknown symbols as the > problem. However, I'm not sure why this module can't load those > symbols. > > I can successfully load them if I just build plain Linaro 4.4.9, > without PREEMPT RT. > > [ 14.023055] wcn36xx: Unknown symbol mutex_lock (err 0) > [ 14.023105] wcn36xx: Unknown symbol __mutex_init (err 0) > [ 14.027153] wcn36xx: Unknown symbol mutex_unlock (err 0) > [ 14.027208] wcn36xx: Unknown symbol _raw_spin_unlock (err 0) > [ 16.961824] wcn36xx: Unknown symbol mutex_lock (err 0) > [ 16.961889] wcn36xx: Unknown symbol __mutex_init (err 0) > [ 16.965955] wcn36xx: Unknown symbol mutex_unlock (err 0) > [ 16.971391] wcn36xx: Unknown symbol _raw_spin_unlock (err 0) This just seems to indicate that you haven't rebuilt this module for the RT kernel. These symbols don't exist w/ RT, because they're switched up through macros/inlines to make use of the rt_mutex type. You'll need to ensure you're building the module for the target kernel. Julia -- 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
