[PATCH 09/22] s390: mm: use mm_is_kernel() for kernel mm checks
Kevin Brodsky <[email protected]>
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| Message-ID | <[email protected]> |
The new MMF_KERNEL flag identifies kernel-owned mm's. Checking the flag with mm_is_kernel() is preferred over comparing directly against &init_mm. No functional change, as only init_mm has MMF_KERNEL set for now. Assisted-by: Codex:GPT-5.5 Signed-off-by: Kevin Brodsky <[email protected]> --- arch/s390/include/asm/mmu_context.h | 2 +- arch/s390/include/asm/pgtable.h | 6 +++--- arch/s390/mm/pgalloc.c | 4 ++-- 3 files changed, 6 insertions(+), 6 deletions(-) diff --git a/arch/s390/include/asm/mmu_context.h b/arch/s390/include/asm/mmu_context.h index bd1ef5e2d2eb..675f270d0b70 100644 --- a/arch/s390/include/asm/mmu_context.h +++ b/arch/s390/include/asm/mmu_context.h @@ -69,7 +69,7 @@ static inline void switch_mm_irqs_off(struct mm_struct *prev, struct mm_struct * { int cpu = smp_processor_id(); - if (next == &init_mm) + if (mm_is_kernel(next)) get_lowcore()->user_asce = s390_invalid_asce; else get_lowcore()->user_asce.val = next->context.asce; diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h index e882663a58e7..f7741e6b417e 100644 --- a/arch/s390/include/asm/pgtable.h +++ b/arch/s390/include/asm/pgtable.h @@ -1836,21 +1836,21 @@ static inline int has_transparent_hugepage(void) #ifdef CONFIG_PAGE_TABLE_CHECK static inline bool pte_user_accessible_page(struct mm_struct *mm, unsigned long addr, pte_t pte) { - VM_BUG_ON(mm == &init_mm); + VM_BUG_ON(mm_is_kernel(mm)); return pte_present(pte); } static inline bool pmd_user_accessible_page(struct mm_struct *mm, unsigned long addr, pmd_t pmd) { - VM_BUG_ON(mm == &init_mm); + VM_BUG_ON(mm_is_kernel(mm)); return pmd_leaf(pmd) && (pmd_val(pmd) & _SEGMENT_ENTRY_READ); } static inline bool pud_user_accessible_page(struct mm_struct *mm, unsigned long addr, pud_t pud) { - VM_BUG_ON(mm == &init_mm); + VM_BUG_ON(mm_is_kernel(mm)); return pud_leaf(pud); } diff --git a/arch/s390/mm/pgalloc.c b/arch/s390/mm/pgalloc.c index 7ac44543e051..d0456b7e73d4 100644 --- a/arch/s390/mm/pgalloc.c +++ b/arch/s390/mm/pgalloc.c @@ -20,7 +20,7 @@ unsigned long *crst_table_alloc_noprof(struct mm_struct *mm) struct ptdesc *ptdesc; unsigned long *table; - if (mm == &init_mm) + if (mm_is_kernel(mm)) gfp &= ~__GFP_ACCOUNT; ptdesc = pagetable_alloc_noprof(gfp, CRST_ALLOC_ORDER); if (!ptdesc) @@ -120,7 +120,7 @@ unsigned long *page_table_alloc_noprof(struct mm_struct *mm) struct ptdesc *ptdesc; unsigned long *table; - if (mm == &init_mm) + if (mm_is_kernel(mm)) gfp &= ~__GFP_ACCOUNT; ptdesc = pagetable_alloc_noprof(gfp, 0); if (!ptdesc) -- 2.51.2