parisc: remove mmap linked list from cache handling

Use the VMA iterator instead.

Link: https://lkml.kernel.org/r/20220906194824.2110408-33-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>
Reviewed-by: Davidlohr Bueso <dave@stgolabs.net>
Tested-by: Yu Zhao <yuzhao@google.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Cc: SeongJae Park <sj@kernel.org>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/arch/parisc/kernel/cache.c b/arch/parisc/kernel/cache.c
index 3feb769..1d3b8bc 100644 (file)
--- a/arch/parisc/kernel/cache.c
+++ b/arch/parisc/kernel/cache.c
@@ -657,15 +657,20 @@ 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
@@ -685,7 +690,7 @@ 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);
 }