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powerpc/mm: ppc 603 doesn't need update_mmu_cache()

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On powerpc 603, there is no hash table so get out of
update_mmu_cache() early.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/6133e0f115d955fac4061536dab0fa7480a1c433.1565933217.git.christophe.leroy@c-s.fr
This commit is contained in:
Christophe Leroy 2019-08-16 05:41:44 +00:00 committed by Michael Ellerman
parent f49f4e2b68
commit f204338f8e
1 changed files with 2 additions and 0 deletions
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2
arch/powerpc/mm/book3s32/mmu.c
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@ -319,6 +319,8 @@ void hash_preload(struct mm_struct *mm, unsigned long ea)
void update_mmu_cache(struct vm_area_struct *vma, unsigned long address,
pte_t *ptep)
{
if (!mmu_has_feature(MMU_FTR_HPTE_TABLE))
return;
/*
* We don't need to worry about _PAGE_PRESENT here because we are
* called with either mm->page_table_lock held or ptl lock held