On Sun, 2011-04-17 at 11:11 -0400, John David Anglin wrote: > > On Sat, 2011-04-16 at 19:35 -0400, John David Anglin wrote: > > > On Sat, 16 Apr 2011, James Bottomley wrote: > > > > > > > Strike that one ... I enabled USB in my 2.6.39-rc3 build and it inserts > > > > the OHCI module and discovers the ports just fine. > > > > > > Boot 2.6.39-rc3 fails for me with attached config. > > > > I can't quite build it. With gcc version 4.2.4 (Debian 4.2.4-6) I'm > > getting an ICE: > > > > net/wireless/reg.c: In function 'freq_reg_info_regd': > > net/wireless/reg.c:645: internal compiler error: in expand_expr_real_1, > > at expr.c:8744 > > Please submit a full bug report, > > with preprocessed source if appropriate. > > See <URL:http://gcc.gnu.org/bugs.html> for instructions. > > For Debian GNU/Linux specific bug reporting instructions, > > see <URL:file:///usr/share/doc/gcc-4.2/README.Bugs>. > > make[2]: *** [net/wireless/reg.o] Error 1 > > This is probably fixed as it doesn't occur with > gcc version 4.5.3 20110101 (prerelease) [gcc-4_5-branch revision 168387] (GCC) . > GCC 4.2 and 4.3 are no longer maintained and there won't be any further > releases from these branches. > > Without looking at the above, it's hard to tell whether the bug is a > middle-end or backend bug. Many middle-end bugs are fixed in more recent > GCC versions. Although newer versions may bring their own problems, > we can get help in fixing problems particularly if they are regressions. > > The asm delay slot bug affected all GCC versions. I backported the fix to > the 4.3, 4.4 and 4.5 branches. This is a problem in the kernel because of > the following: > > ** The __asm__ op below simple prevents gcc/ld from reordering > ** instructions across the mb() "call". > */ > #define mb() __asm__ __volatile__("":::"memory") /* barrier() */ > > It's just a matter of chance whether a barrier ends up in the delay slot > of a branch in a critical location. I'll redo optimisation on that one and see if I can avoid this. > > Plus there's a bug in my kernel code: > > > > drivers/usb/host/xhci-pci.c: In function 'xhci_pci_setup': > > drivers/usb/host/xhci-pci.c:61: error: implicit declaration of function > > 'kzalloc > > > > If I correct for these (add missing slab.h include and disable wireless) > > I had to add missing slab.h as well. However, I didn't touch wireless > with 4.5.3. > > > and build, the last message I see is > > > > turn off boot console ttyB0 > > > > Which indicates it's got a problem with the console configuration (I > > don't see any console registration for the DIVA serial port on ttyS1 in > > the boot log). > > Comparing the console output that I recorded for the debian kernel, I > see udev starts much earlier. It only has the initial message from the > tg3 driver and SCSI subsystem. It's most likely a driver module that's getting loaded which is turned off in the booting configuration ... finding it isn't going to be easy, though ... James -- To unsubscribe from this list: send the line "unsubscribe linux-parisc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
