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>
---
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.
