+ optee-remove-vma-linked-list-walk.patch added to mm-unstable branch

+ optee-remove-vma-linked-list-walk.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: optee: remove vma linked list walk
has been added to the -mm mm-unstable branch.  Its filename is
     optee-remove-vma-linked-list-walk.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/optee-remove-vma-linked-list-walk.patch

This patch will later appear in the mm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Subject: optee: remove vma linked list walk
Date: Mon, 22 Aug 2022 15:06:24 +0000

Use the VMA iterator instead.  Change the calling convention of
__check_mem_type() to pass in the mm instead of the first vma in the
range.

Link: https://lkml.kernel.org/r/20220822150128.1562046-39-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 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>
Cc: Yu Zhao <yuzhao@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 drivers/tee/optee/call.c |   18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

--- a/drivers/tee/optee/call.c~optee-remove-vma-linked-list-walk
+++ a/drivers/tee/optee/call.c
@@ -492,15 +492,18 @@ static bool is_normal_memory(pgprot_t p)
 #endif
 }
 
-static int __check_mem_type(struct vm_area_struct *vma, unsigned long end)
+static int __check_mem_type(struct mm_struct *mm, unsigned long start,
+				unsigned long end)
 {
-	while (vma && is_normal_memory(vma->vm_page_prot)) {
-		if (vma->vm_end >= end)
-			return 0;
-		vma = vma->vm_next;
+	struct vm_area_struct *vma;
+	VMA_ITERATOR(vmi, mm, start);
+
+	for_each_vma_range(vmi, vma, end) {
+		if (!is_normal_memory(vma->vm_page_prot))
+			return -EINVAL;
 	}
 
-	return -EINVAL;
+	return 0;
 }
 
 int optee_check_mem_type(unsigned long start, size_t num_pages)
@@ -516,8 +519,7 @@ int optee_check_mem_type(unsigned long s
 		return 0;
 
 	mmap_read_lock(mm);
-	rc = __check_mem_type(find_vma(mm, start),
-			      start + num_pages * PAGE_SIZE);
+	rc = __check_mem_type(mm, start, start + num_pages * PAGE_SIZE);
 	mmap_read_unlock(mm);
 
 	return rc;
_

Patches currently in -mm which might be from willy@infradead.org are

support-highmem-pages-in-vmap_pages_range_noflush.patch
mm-add-vma-iterator.patch
mmap-use-the-vma-iterator-in-count_vma_pages_range.patch
proc-remove-vma-rbtree-use-from-nommu.patch
arm64-remove-mmap-linked-list-from-vdso.patch
parisc-remove-mmap-linked-list-from-cache-handling.patch
powerpc-remove-mmap-linked-list-walks.patch
s390-remove-vma-linked-list-walks.patch
x86-remove-vma-linked-list-walks.patch
xtensa-remove-vma-linked-list-walks.patch
cxl-remove-vma-linked-list-walk.patch
optee-remove-vma-linked-list-walk.patch
um-remove-vma-linked-list-walk.patch
coredump-remove-vma-linked-list-walk.patch
exec-use-vma-iterator-instead-of-linked-list.patch
fs-proc-task_mmu-stop-using-linked-list-and-highest_vm_end.patch
acct-use-vma-iterator-instead-of-linked-list.patch
perf-use-vma-iterator.patch
sched-use-maple-tree-iterator-to-walk-vmas.patch
fork-use-vma-iterator.patch
mm-khugepaged-stop-using-vma-linked-list.patch
mm-ksm-use-vma-iterators-instead-of-vma-linked-list.patch
mm-mlock-use-vma-iterator-and-maple-state-instead-of-vma-linked-list.patch
mm-pagewalk-use-vma_find-instead-of-vma-linked-list.patch
i915-use-the-vma-iterator.patch
nommu-remove-uses-of-vma-linked-list.patch