On 07/24/11 03:33, Thomas Gleixner wrote:
> Dear RT Folks,
> 
> I'm pleased to announce the 3.0-rt3 release.

ARM panda board boots for PREEMPT_RT_FULL, with a BUG:

Freeing init memory: 308K
BUG: sleeping function called from invalid context at kernel/rtmutex.c:645
in_atomic(): 1, irqs_disabled(): 128, pid: 0, name: swapper
1 lock held by swapper/0:
 #0:  (&irq_desc_lock_class){-.....}, at: [<c00ed470>] handle_fasteoi_irq+0x14/0x10c
irq event stamp: 21292
hardirqs last  enabled at (21291): [<c0061ee0>] default_idle+0x2c/0x3c
hardirqs last disabled at (21292): [<c0484bb4>] __irq_svc+0x34/0x138
softirqs last  enabled at (0): [<  (null)>]   (null)
softirqs last disabled at (0): [<  (null)>]   (null)
[<c00681b8>] (unwind_backtrace+0x0/0xf0) from [<c0483d20>] (rt_spin_lock+0x24/0x5c)
[<c0483d20>] (rt_spin_lock+0x24/0x5c) from [<c006df74>] (gic_mask_irq+0x28/0x7c)
[<c006df74>] (gic_mask_irq+0x28/0x7c) from [<c00ece20>] (mask_irq+0x1c/0x2c)
[<c00ece20>] (mask_irq+0x1c/0x2c) from [<c00ed514>] (handle_fasteoi_irq+0xb8/0x10c)
[<c00ed514>] (handle_fasteoi_irq+0xb8/0x10c) from [<c00ea724>] (generic_handle_irq+0x34/0x50)
[<c00ea724>] (generic_handle_irq+0x34/0x50) from [<c0055048>] (asm_do_IRQ+0x48/0xa8)
[<c0055048>] (asm_do_IRQ+0x48/0xa8) from [<c0484bd0>] (__irq_svc+0x50/0x138)
Exception stack(0xc0629f60 to 0xc0629fa8)
9f60: 00000001 00000001 00000000 0000532b c0628000 c06b6908 c048f7a0 00000000
9f80: c0649268 411fc092 c0649448 00000000 00000000 c0629fa8 c00d7750 c0061ee4
9fa0: 20000013 ffffffff
[<c0484bd0>] (__irq_svc+0x50/0x138) from [<c0061ee4>] (default_idle+0x30/0x3c)
[<c0061ee4>] (default_idle+0x30/0x3c) from [<c006253c>] (cpu_idle+0xc0/0x104)
[<c006253c>] (cpu_idle+0xc0/0x104) from [<c0008980>] (start_kernel+0x278/0x31c)
[<c0008980>] (start_kernel+0x278/0x31c) from [<80008040>] (0x80008040)



.config is attached or use this recipe:

   make omap2plus_defconfig

   Then additional config changes:

   # this allows USB thumb drive
   # Device Drivers -> USB support -> EHCI HCD (USB 2.0) support
   CONFIG_USB_EHCI_HCD=y
   # Device Drivers -> USB support -> EHCI support for OMAP3 and later chips
   CONFIG_USB_EHCI_HCD_OMAP=y

   # ethernet device
   # Device Drivers -> Network device support -> USB Network Adapters ->
   #  Multi-purpose USB Networking Framework ->
   #  SMSC LAN95XX based USB 2.0 10/100 ethernet devices
   CONFIG_USB_NET_SMSC95XX=y

   # Kernel Features -> Preemption Model -> Fully Preemptible Kernel (RT)


-Frank