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UPSTREAM: powerpc/mm: convert coprocessor fault to lock_mm_and_find_vma()

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commit 2cd76c50d0 upstream.

This is one of the simple cases, except there's no pt_regs pointer.
Which is fine, as lock_mm_and_find_vma() is set up to work fine with a
NULL pt_regs.

Powerpc already enabled LOCK_MM_AND_FIND_VMA for the main CPU faulting,
so we can just use the helper without any extra work.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Samuel Mendoza-Jonas <samjonas@amazon.com>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Change-Id: I5736f498b2f45625e46554520d3aeb679e680907
(cherry picked from commit 2cd76c50d0)
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Linus Torvalds
2023-06-24 11:17:05 -07:00
committed by Greg Kroah-Hartman
parent 6c33246824
commit 4087cac574
1 changed files with 3 additions and 11 deletions
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14
arch/powerpc/mm/copro_fault.c
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@@ -33,19 +33,11 @@ int copro_handle_mm_fault(struct mm_struct *mm, unsigned long ea,
if (mm->pgd == NULL) if (mm->pgd == NULL)
return -EFAULT; return -EFAULT;
mmap_read_lock(mm); vma = lock_mm_and_find_vma(mm, ea, NULL);
ret = -EFAULT;
vma = find_vma(mm, ea);
if (!vma) if (!vma)
goto out_unlock; return -EFAULT;
if (ea < vma->vm_start) {
if (!(vma->vm_flags & VM_GROWSDOWN))
goto out_unlock;
if (expand_stack(vma, ea))
goto out_unlock;
}
ret = -EFAULT;
is_write = dsisr & DSISR_ISSTORE; is_write = dsisr & DSISR_ISSTORE;
if (is_write) { if (is_write) {
if (!(vma->vm_flags & VM_WRITE)) if (!(vma->vm_flags & VM_WRITE))