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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2023-06-24 11:17:05 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-07-01 13:16:25 +0200 |
| commit | 48c232819e77dcd7ff476e964bc671e0589daae6 (patch) | |
| tree | be6e3827b7f2480342f3852561e902cedefb3fda /arch | |
| parent | 21ee33d51bf9f9489c7e0eb8cb17c803e2d03bd0 (diff) | |
| download | linux-stable-48c232819e77dcd7ff476e964bc671e0589daae6.tar.gz linux-stable-48c232819e77dcd7ff476e964bc671e0589daae6.tar.bz2 linux-stable-48c232819e77dcd7ff476e964bc671e0589daae6.zip | |
powerpc/mm: convert coprocessor fault to lock_mm_and_find_vma()
commit 2cd76c50d0b41cec5c87abfcdf25b236a2793fb6 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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/mm/copro_fault.c | 14 |
1 files changed, 3 insertions, 11 deletions
diff --git a/arch/powerpc/mm/copro_fault.c b/arch/powerpc/mm/copro_fault.c index 7c507fb48182..f49fd873df8d 100644 --- a/arch/powerpc/mm/copro_fault.c +++ b/arch/powerpc/mm/copro_fault.c @@ -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)) |