From 26e66b08c3376b6fb4ad4508d48a4e74d61f0b9b Mon Sep 17 00:00:00 2001 From: Christophe Leroy Date: Fri, 26 Apr 2019 05:59:53 +0000 Subject: [PATCH] powerpc/mm: flatten function __find_linux_pte() step 3 __find_linux_pte() is full of if/else which is hard to follow allthough the handling is pretty simple. Previous patches left a { } block. This patch removes it. Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman --- arch/powerpc/mm/pgtable.c | 98 +++++++++++++++++++-------------------- 1 file changed, 49 insertions(+), 49 deletions(-) diff --git a/arch/powerpc/mm/pgtable.c b/arch/powerpc/mm/pgtable.c index c1c6d0b79baa..db4a6253df92 100644 --- a/arch/powerpc/mm/pgtable.c +++ b/arch/powerpc/mm/pgtable.c @@ -348,59 +348,59 @@ pte_t *__find_linux_pte(pgd_t *pgdir, unsigned long ea, hpdp = (hugepd_t *)&pgd; goto out_huge; } - { - /* - * Even if we end up with an unmap, the pgtable will not - * be freed, because we do an rcu free and here we are - * irq disabled - */ - pdshift = PUD_SHIFT; - pudp = pud_offset(&pgd, ea); - pud = READ_ONCE(*pudp); - if (pud_none(pud)) - return NULL; + /* + * Even if we end up with an unmap, the pgtable will not + * be freed, because we do an rcu free and here we are + * irq disabled + */ + pdshift = PUD_SHIFT; + pudp = pud_offset(&pgd, ea); + pud = READ_ONCE(*pudp); - if (pud_huge(pud)) { - ret_pte = (pte_t *) pudp; - goto out; - } - if (is_hugepd(__hugepd(pud_val(pud)))) { - 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; - } + if (pud_none(pud)) + return NULL; - return pte_offset_kernel(&pmd, ea); + if (pud_huge(pud)) { + ret_pte = (pte_t *)pudp; + goto out; } + if (is_hugepd(__hugepd(pud_val(pud)))) { + 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); + out_huge: if (!hpdp) return NULL; -- 2.30.2