powerpc/mm: flatten function __find_linux_pte() step 2
authorChristophe Leroy <christophe.leroy@c-s.fr>
Fri, 26 Apr 2019 05:59:52 +0000 (05:59 +0000)
committerMichael Ellerman <mpe@ellerman.id.au>
Thu, 2 May 2019 15:20:24 +0000 (01:20 +1000)
__find_linux_pte() is full of if/else which is hard to
follow allthough the handling is pretty simple.

Previous patch left { } blocks. This patch removes the first one
by shifting its content to the left.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
arch/powerpc/mm/pgtable.c

index d332abe..c1c6d0b 100644 (file)
@@ -369,39 +369,37 @@ pte_t *__find_linux_pte(pgd_t *pgdir, unsigned long ea,
                        hpdp = (hugepd_t *)&pud;
                        goto out_huge;
                }
-               {
-                       pdshift = PMD_SHIFT;
-                       pmdp = pmd_offset(&pud, ea);
-                       pmd  = READ_ONCE(*pmdp);
-                       /*
-                        * A hugepage collapse is captured by pmd_none, because
-                        * it mark the pmd none and do a hpte invalidate.
-                        */
-                       if (pmd_none(pmd))
-                               return NULL;
-
-                       if (pmd_trans_huge(pmd) || pmd_devmap(pmd)) {
-                               if (is_thp)
-                                       *is_thp = true;
-                               ret_pte = (pte_t *) pmdp;
-                               goto out;
-                       }
-                       /*
-                        * pmd_large check below will handle the swap pmd pte
-                        * we need to do both the check because they are config
-                        * dependent.
-                        */
-                       if (pmd_huge(pmd) || pmd_large(pmd)) {
-                               ret_pte = (pte_t *) pmdp;
-                               goto out;
-                       }
-                       if (is_hugepd(__hugepd(pmd_val(pmd)))) {
-                               hpdp = (hugepd_t *)&pmd;
-                               goto out_huge;
-                       }
-
-                       return pte_offset_kernel(&pmd, ea);
+               pdshift = PMD_SHIFT;
+               pmdp = pmd_offset(&pud, ea);
+               pmd  = READ_ONCE(*pmdp);
+               /*
+                * A hugepage collapse is captured by pmd_none, because
+                * it mark the pmd none and do a hpte invalidate.
+                */
+               if (pmd_none(pmd))
+                       return NULL;
+
+               if (pmd_trans_huge(pmd) || pmd_devmap(pmd)) {
+                       if (is_thp)
+                               *is_thp = true;
+                       ret_pte = (pte_t *)pmdp;
+                       goto out;
+               }
+               /*
+                * pmd_large check below will handle the swap pmd pte
+                * we need to do both the check because they are config
+                * dependent.
+                */
+               if (pmd_huge(pmd) || pmd_large(pmd)) {
+                       ret_pte = (pte_t *)pmdp;
+                       goto out;
                }
+               if (is_hugepd(__hugepd(pmd_val(pmd)))) {
+                       hpdp = (hugepd_t *)&pmd;
+                       goto out_huge;
+               }
+
+               return pte_offset_kernel(&pmd, ea);
        }
 out_huge:
        if (!hpdp)