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    Subject[PATCH v11 32/69] parisc: remove mmap linked list from cache handling
    Date
    From: "Matthew Wilcox (Oracle)" <willy@infradead.org>

    Use the VMA iterator instead.

    Link: https://lkml.kernel.org/r/20220504011345.662299-17-Liam.Howlett@oracle.com
    Link: https://lkml.kernel.org/r/20220621204632.3370049-33-Liam.Howlett@oracle.com
    Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
    Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
    Acked-by: Vlastimil Babka <vbabka@suse.cz>
    Cc: Catalin Marinas <catalin.marinas@arm.com>
    Cc: David Howells <dhowells@redhat.com>
    Cc: SeongJae Park <sj@kernel.org>
    Cc: Will Deacon <will@kernel.org>
    Cc: Davidlohr Bueso <dave@stgolabs.net>
    Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
    ---
    arch/parisc/kernel/cache.c | 9 +++++++--
    1 file changed, 7 insertions(+), 2 deletions(-)

    diff --git a/arch/parisc/kernel/cache.c b/arch/parisc/kernel/cache.c
    index c8a11fcecf4c..3c8679e3ef10 100644
    --- a/arch/parisc/kernel/cache.c
    +++ b/arch/parisc/kernel/cache.c
    @@ -660,15 +660,20 @@ static inline unsigned long mm_total_size(struct mm_struct *mm)
    {
    struct vm_area_struct *vma;
    unsigned long usize = 0;
    + VMA_ITERATOR(vmi, mm, 0);

    - for (vma = mm->mmap; vma && usize < parisc_cache_flush_threshold; vma = vma->vm_next)
    + for_each_vma(vmi, vma) {
    + if (usize >= parisc_cache_flush_threshold)
    + break;
    usize += vma->vm_end - vma->vm_start;
    + }
    return usize;
    }

    void flush_cache_mm(struct mm_struct *mm)
    {
    struct vm_area_struct *vma;
    + VMA_ITERATOR(vmi, mm, 0);

    /*
    * Flushing the whole cache on each cpu takes forever on
    @@ -688,7 +693,7 @@ void flush_cache_mm(struct mm_struct *mm)
    }

    /* Flush mm */
    - for (vma = mm->mmap; vma; vma = vma->vm_next)
    + for_each_vma(vmi, vma)
    flush_cache_pages(vma, vma->vm_start, vma->vm_end);
    }

    --
    2.35.1
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