[PATCH v12 32/69] parisc: remove mmap linked list from cache handling

Liam Howlett
2022-07-20T02:22:07Z

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