[PATCH v2 11/23] powerpc: kvmppc_unmap_free_pmd() pte_offset_kernel()

[Hugh Dickins]

kvmppc_unmap_free_pmd() use pte_offset_kernel(), like everywhere else
in book3s_64_mmu_radix.c: instead of pte_offset_map(), which will come
to need a pte_unmap() to balance it.

But note that this is a more complex case than most: see those -EAGAINs
in kvmppc_create_pte(), which is coping with kvmppc races beween page
table and huge entry, of the kind which we are expecting to address
in pte_offset_map() - this might want to be revisited in future.

Signed-off-by: Hugh Dickins <hu...@google.com>
---
 arch/powerpc/kvm/book3s_64_mmu_radix.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/kvm/book3s_64_mmu_radix.c 
b/arch/powerpc/kvm/book3s_64_mmu_radix.c
index 461307b89c3a..572707858d65 100644
--- a/arch/powerpc/kvm/book3s_64_mmu_radix.c
+++ b/arch/powerpc/kvm/book3s_64_mmu_radix.c
@@ -509,7 +509,7 @@ static void kvmppc_unmap_free_pmd(struct kvm *kvm, pmd_t 
*pmd, bool full,
                } else {
                        pte_t *pte;
 
-                       pte = pte_offset_map(p, 0);
+                       pte = pte_offset_kernel(p, 0);
                        kvmppc_unmap_free_pte(kvm, pte, full, lpid);
                        pmd_clear(p);
                }
-- 
2.35.3