Commit 2cd76c50 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

powerpc/mm: convert coprocessor fault to lock_mm_and_find_vma() 



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: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent a050ba1e

arch/powerpc/mm/copro_fault.c

+3 −11
Original line number Diff line number Diff line
@@ -33,19 +33,11 @@ int copro_handle_mm_fault(struct mm_struct *mm, unsigned long ea, 
	if (mm->pgd == NULL)

		return -EFAULT;



	mmap_read_lock(mm);

	ret = -EFAULT;

	vma = find_vma(mm, ea);

	vma = lock_mm_and_find_vma(mm, ea, NULL);

	if (!vma)

		goto out_unlock;



	if (ea < vma->vm_start) {

		if (!(vma->vm_flags & VM_GROWSDOWN))

			goto out_unlock;

		if (expand_stack(vma, ea))

			goto out_unlock;

	}

		return -EFAULT;



	ret = -EFAULT;

	is_write = dsisr & DSISR_ISSTORE;

	if (is_write) {

		if (!(vma->vm_flags & VM_WRITE))