diff options
Diffstat (limited to 'arch/arm64/mm')
| -rw-r--r-- | arch/arm64/mm/context.c | 8 | ||||
| -rw-r--r-- | arch/arm64/mm/dma-mapping.c | 3 | ||||
| -rw-r--r-- | arch/arm64/mm/hugetlbpage.c | 4 | ||||
| -rw-r--r-- | arch/arm64/mm/init.c | 2 |
4 files changed, 12 insertions, 5 deletions
diff --git a/arch/arm64/mm/context.c b/arch/arm64/mm/context.c index baa758d37021..76c1e6cd36fc 100644 --- a/arch/arm64/mm/context.c +++ b/arch/arm64/mm/context.c @@ -92,6 +92,14 @@ static void reset_context(void *info) unsigned int cpu = smp_processor_id(); struct mm_struct *mm = current->active_mm; + /* + * current->active_mm could be init_mm for the idle thread immediately + * after secondary CPU boot or hotplug. TTBR0_EL1 is already set to + * the reserved value, so no need to reset any context. + */ + if (mm == &init_mm) + return; + smp_rmb(); asid = cpu_last_asid + cpu; diff --git a/arch/arm64/mm/dma-mapping.c b/arch/arm64/mm/dma-mapping.c index de3abbe6c59f..893802645efe 100644 --- a/arch/arm64/mm/dma-mapping.c +++ b/arch/arm64/mm/dma-mapping.c @@ -65,8 +65,7 @@ static void *__dma_alloc_coherent(struct device *dev, size_t size, *dma_handle = phys_to_dma(dev, page_to_phys(page)); addr = page_address(page); - if (flags & __GFP_ZERO) - memset(addr, 0, size); + memset(addr, 0, size); return addr; } else { return swiotlb_alloc_coherent(dev, size, dma_handle, flags); diff --git a/arch/arm64/mm/hugetlbpage.c b/arch/arm64/mm/hugetlbpage.c index 023747bf4dd7..e3a24b75e53c 100644 --- a/arch/arm64/mm/hugetlbpage.c +++ b/arch/arm64/mm/hugetlbpage.c @@ -46,13 +46,13 @@ struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address, int pmd_huge(pmd_t pmd) { - return !(pmd_val(pmd) & PMD_TABLE_BIT); + return pmd_val(pmd) && !(pmd_val(pmd) & PMD_TABLE_BIT); } int pud_huge(pud_t pud) { #ifndef __PAGETABLE_PMD_FOLDED - return !(pud_val(pud) & PUD_TABLE_BIT); + return pud_val(pud) && !(pud_val(pud) & PUD_TABLE_BIT); #else return 0; #endif diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c index 2d8f884d7f92..7a45e8c7868b 100644 --- a/arch/arm64/mm/init.c +++ b/arch/arm64/mm/init.c @@ -260,7 +260,7 @@ static void __init free_unused_memmap(void) * memmap entries are valid from the bank end aligned to * MAX_ORDER_NR_PAGES. */ - prev_end = ALIGN(start + __phys_to_pfn(reg->size), + prev_end = ALIGN(__phys_to_pfn(reg->base + reg->size), MAX_ORDER_NR_PAGES); } |