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

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Message-ID: <20220720021727.17018-33-Liam.Howlett@oracle.com>
Date:   Wed, 20 Jul 2022 02:17:54 +0000
From:   Liam Howlett <liam.howlett@...cle.com>
To:     "maple-tree@...ts.infradead.org" <maple-tree@...ts.infradead.org>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Hugh Dickins <hughd@...gle.com>
CC:     Yu Zhao <yuzhao@...gle.com>
Subject: [PATCH v12 32/69] parisc: remove mmap linked list from cache handling

From: "Matthew Wilcox (Oracle)" <willy@...radead.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@...radead.org>
Signed-off-by: Liam R. Howlett <Liam.Howlett@...cle.com>
Acked-by: Vlastimil Babka <vbabka@...e.cz>
Cc: Catalin Marinas <catalin.marinas@....com>
Cc: David Howells <dhowells@...hat.com>
Cc: SeongJae Park <sj@...nel.org>
Cc: Will Deacon <will@...nel.org>
Cc: Davidlohr Bueso <dave@...olabs.net>
Signed-off-by: Andrew Morton <akpm@...ux-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