On 2012.12.15 at 17:33 +0100, Markus Trippelsdorf wrote: > On 2012.12.14 at 17:47 -0800, Linus Torvalds wrote: > > On Fri, Dec 14, 2012 at 5:41 PM, Linus Torvalds > > <torva...@linux-foundation.org> wrote: > > > I was wrong. It's not the x86 UAPI split, it's the DT pull. More people > > > added. > > > > Looking at the merge (just in case it could have done something odd), > > I'm starting to worry that this is some nasty heisenbug, and my > > bisection is not trustworthy at all. Because the DT pull sure as heck > > doesn't look like a likely candidate for anything either. > > > > Ho humm. Anybody else see anything strange? > > Yes. I'm seeing a BUG early during boot on my machine (RIP=NULL): > > BUG: unable to handle kernel NULL pointer dereference at (null) > > This is caused by: > > commit 53b87cf088e2ea68d7c59619d0214cc15bb76133 > Author: Matt Fleming <matt.flem...@intel.com> > Date: Fri Sep 7 18:23:51 2012 +0100 > > x86, mm: Include the entire kernel memory map in trampoline_pgd > > There are various pieces of code in arch/x86 that require a page table > with an identity mapping. Make trampoline_pgd a proper kernel page > table, it currently only includes the kernel text and module space > mapping. > > One new feature of trampoline_pgd is that it now has mappings for the > physical I/O device addresses, which are inserted at ioremap() > time. Some broken implementations of EFI firmware require these > mappings to always be around. > > Acked-by: Jan Beulich <jbeul...@suse.com> > Signed-off-by: Matt Fleming <matt.flem...@intel.com> >
Adding Matt to CC. -- Markus -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
