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    Subject[PATCH v3 26/66] arch/parisc: Remove mmap linked list from kernel/cache
    Date
    From: "Liam R. Howlett" <Liam.Howlett@Oracle.com>

    Start using the maple tree

    Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
    ---
    arch/parisc/kernel/cache.c | 15 ++++++++++++---
    1 file changed, 12 insertions(+), 3 deletions(-)

    diff --git a/arch/parisc/kernel/cache.c b/arch/parisc/kernel/cache.c
    index 39e02227e231..f6316aafba10 100644
    --- a/arch/parisc/kernel/cache.c
    +++ b/arch/parisc/kernel/cache.c
    @@ -519,9 +519,13 @@ static inline unsigned long mm_total_size(struct mm_struct *mm)
    {
    struct vm_area_struct *vma;
    unsigned long usize = 0;
    + MA_STATE(mas, &mm->mm_mt, 0, 0);

    - for (vma = mm->mmap; vma; vma = vma->vm_next)
    + rcu_read_lock();
    + mas_for_each(&mas, vma, ULONG_MAX)
    usize += vma->vm_end - vma->vm_start;
    + rcu_read_unlock();
    +
    return usize;
    }

    @@ -547,6 +551,7 @@ void flush_cache_mm(struct mm_struct *mm)
    {
    struct vm_area_struct *vma;
    pgd_t *pgd;
    + MA_STATE(mas, &mm->mm_mt, 0, 0);

    /* Flushing the whole cache on each cpu takes forever on
    rp3440, etc. So, avoid it if the mm isn't too big. */
    @@ -559,17 +564,20 @@ void flush_cache_mm(struct mm_struct *mm)
    }

    if (mm->context == mfsp(3)) {
    - for (vma = mm->mmap; vma; vma = vma->vm_next) {
    + rcu_read_lock();
    + mas_for_each(&mas, vma, ULONG_MAX) {
    flush_user_dcache_range_asm(vma->vm_start, vma->vm_end);
    if (vma->vm_flags & VM_EXEC)
    flush_user_icache_range_asm(vma->vm_start, vma->vm_end);
    flush_tlb_range(vma, vma->vm_start, vma->vm_end);
    }
    + rcu_read_unlock();
    return;
    }

    pgd = mm->pgd;
    - for (vma = mm->mmap; vma; vma = vma->vm_next) {
    + rcu_read_lock();
    + mas_for_each(&mas, vma, ULONG_MAX) {
    unsigned long addr;

    for (addr = vma->vm_start; addr < vma->vm_end;
    @@ -589,6 +597,7 @@ void flush_cache_mm(struct mm_struct *mm)
    }
    }
    }
    + rcu_read_unlock();
    }

    void flush_cache_range(struct vm_area_struct *vma,
    --
    2.30.2
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