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From:   Liam Howlett <liam.howlett@oracle.com>
To:     "maple-tree@lists.infradead.org" <maple-tree@lists.infradead.org>,
        "linux-mm@kvack.org" <linux-mm@kvack.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Andrew Morton <akpm@linux-foundation.org>
CC:     Song Liu <songliubraving@fb.com>,
        Davidlohr Bueso <dave@stgolabs.net>,
        "Paul E . McKenney" <paulmck@kernel.org>,
        Matthew Wilcox <willy@infradead.org>,
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        Rik van Riel <riel@surriel.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Michel Lespinasse <walken.cr@gmail.com>,
        Liam Howlett <liam.howlett@oracle.com>
Subject: [PATCH 55/94] arch/powerpc: Remove mmap linked list from
 mm/book3s32/tlb
Thread-Topic: [PATCH 55/94] arch/powerpc: Remove mmap linked list from
 mm/book3s32/tlb
Thread-Index: AQHXPEQ5yqMQ+4LCgk2H5dMsxH8uuQ==
Date:   Wed, 28 Apr 2021 15:36:15 +0000
Message-ID: <20210428153542.2814175-56-Liam.Howlett@Oracle.com>
References: <20210428153542.2814175-1-Liam.Howlett@Oracle.com>
In-Reply-To: <20210428153542.2814175-1-Liam.Howlett@Oracle.com>
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Start using the maple tree

Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
---
 arch/powerpc/mm/book3s32/tlb.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/mm/book3s32/tlb.c b/arch/powerpc/mm/book3s32/tlb.=
c
index 19f0ef950d77..2c8b991de8e8 100644
--- a/arch/powerpc/mm/book3s32/tlb.c
+++ b/arch/powerpc/mm/book3s32/tlb.c
@@ -81,6 +81,7 @@ EXPORT_SYMBOL(hash__flush_range);
 void hash__flush_tlb_mm(struct mm_struct *mm)
 {
 	struct vm_area_struct *mp;
+	MA_STATE(mas, &mm->mm_mt, 0, 0);
=20
 	/*
 	 * It is safe to go down the mm's list of vmas when called
@@ -88,8 +89,10 @@ void hash__flush_tlb_mm(struct mm_struct *mm)
 	 * unmap_region or exit_mmap, but not from vmtruncate on SMP -
 	 * but it seems dup_mmap is the only SMP case which gets here.
 	 */
-	for (mp =3D mm->mmap; mp !=3D NULL; mp =3D mp->vm_next)
+	rcu_read_lock();
+	mas_for_each(&mas, mp, ULONG_MAX)
 		hash__flush_range(mp->vm_mm, mp->vm_start, mp->vm_end);
+	rcu_read_unlock();
 }
 EXPORT_SYMBOL(hash__flush_tlb_mm);
=20
--=20
2.30.2