On Mon, May 18, 2020 at 10:15:11PM +0300, Mike Rapoport wrote: > On Mon, May 18, 2020 at 11:09:46AM -0700, Guenter Roeck wrote: > > On 5/18/20 7:23 AM, Mike Rapoport wrote: > > > > Below is another set of bisect results, from next-20200518. It points to one > > of your commits. This is for microblaze (big endian) boot failures. > > The microblaze one was easy, as for sparc32 I still have no clue for the > root cause :( > > Andrew, can you please fold it into "mm: pgtable: add shortcuts for > accessing kernel PMD and PTE"? > > From 167250de28aa526342641b2647294a755d234090 Mon Sep 17 00:00:00 2001 > From: Mike Rapoport <r...@linux.ibm.com> > Date: Mon, 18 May 2020 22:08:10 +0300 > Subject: [PATCH] microblaze: fix page table traversal in setup_rt_frame() > > The replacement of long folded page table traversal with the direct access > to PMD entry wrongly used the kernel page table in setup_rt_frame() > function instead of the process (current->mm) page table. > > Fix it. > > Signed-off-by: Mike Rapoport <r...@linux.ibm.com>
Tested-by: Guenter Roeck <li...@roeck-us.net> > --- > arch/microblaze/kernel/signal.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/arch/microblaze/kernel/signal.c b/arch/microblaze/kernel/signal.c > index 28b1ec4b4e79..bdd6d0c86e16 100644 > --- a/arch/microblaze/kernel/signal.c > +++ b/arch/microblaze/kernel/signal.c > @@ -194,7 +194,7 @@ static int setup_rt_frame(struct ksignal *ksig, sigset_t > *set, > > address = ((unsigned long)frame->tramp); > #ifdef CONFIG_MMU > - pmdp = pmd_off_k(address); > + pmdp = pmd_off(current->mm, address); > > preempt_disable(); > ptep = pte_offset_map(pmdp, address); > -- > 2.26.2 > > > > Guenter > > > > --- > > -- > Sincerely yours, > Mike.
