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m68k: mm: Remove check for VM_IO to fix deferred I/O

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When an application accesses a mapped frame buffer backed by deferred
I/O, it receives a segmentation fault.  Fix this by removing the check
for VM_IO in do_page_fault().

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
Link: https://lore.kernel.org/r/20220128173006.1713210-1-geert@linux-m68k.org
This commit is contained in:
Geert Uytterhoeven 2022-01-28 18:30:06 +01:00
parent 91d7b75a58
commit c4d5b6eef2
1 changed files with 0 additions and 2 deletions
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2
arch/m68k/mm/fault.c
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@ -93,8 +93,6 @@ retry:
vma = find_vma(mm, address); vma = find_vma(mm, address);
if (!vma) if (!vma)
goto map_err; goto map_err;
if (vma->vm_flags & VM_IO)
goto acc_err;
if (vma->vm_start <= address) if (vma->vm_start <= address)
goto good_area; goto good_area;
if (!(vma->vm_flags & VM_GROWSDOWN)) if (!(vma->vm_flags & VM_GROWSDOWN))