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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>,
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        Michel Lespinasse <walken.cr@gmail.com>,
        Liam Howlett <liam.howlett@oracle.com>
Subject: [PATCH 59/94] arch/xtensa: Use maple tree iterators for unmapped area
Thread-Topic: [PATCH 59/94] arch/xtensa: Use maple tree iterators for unmapped
 area
Thread-Index: AQHXPEQ6j0S6k1UavUqJQjvUslCcVQ==
Date:   Wed, 28 Apr 2021 15:36:17 +0000
Message-ID: <20210428153542.2814175-60-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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Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
---
 arch/xtensa/kernel/syscall.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/xtensa/kernel/syscall.c b/arch/xtensa/kernel/syscall.c
index 201356faa7e6..118fe0ca7594 100644
--- a/arch/xtensa/kernel/syscall.c
+++ b/arch/xtensa/kernel/syscall.c
@@ -58,6 +58,7 @@ unsigned long arch_get_unmapped_area(struct file *filp, u=
nsigned long addr,
 		unsigned long len, unsigned long pgoff, unsigned long flags)
 {
 	struct vm_area_struct *vmm;
+	MA_STATE(mas, &mm->mm_mt, addr, addr);
=20
 	if (flags & MAP_FIXED) {
 		/* We do not accept a shared mapping if it would violate
@@ -79,7 +80,8 @@ unsigned long arch_get_unmapped_area(struct file *filp, u=
nsigned long addr,
 	else
 		addr =3D PAGE_ALIGN(addr);
=20
-	for (vmm =3D find_vma(current->mm, addr); ; vmm =3D vmm->vm_next) {
+	/* Must hold mm_mt lock */
+	mas_for_each(&mas, vmm, ULONG_MAX) {
 		/* At this point:  (!vmm || addr < vmm->vm_end). */
 		if (TASK_SIZE - len < addr)
 			return -ENOMEM;
--=20
2.30.2