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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>,
        Hugh Dickins <hughd@google.com>
CC:     Yu Zhao <yuzhao@google.com>
Subject: [PATCH v12 31/69] arm64: Change elfcore for_each_mte_vma() to use VMA
 iterator
Thread-Topic: [PATCH v12 31/69] arm64: Change elfcore for_each_mte_vma() to
 use VMA iterator
Thread-Index: AQHYm97rG1IFQaek0E2j6iFq4wTw1w==
Date:   Wed, 20 Jul 2022 02:17:54 +0000
Message-ID: <20220720021727.17018-32-Liam.Howlett@oracle.com>
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From: "Liam R. Howlett" <Liam.Howlett@Oracle.com>

Rework for_each_mte_vma() to use a VMA iterator instead of an explicit
linked-list.

Link: https://lkml.kernel.org/r/20220504011345.662299-16-Liam.Howlett@oracl=
e.com
Link: https://lkml.kernel.org/r/20220621204632.3370049-32-Liam.Howlett@orac=
le.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/20220218023650.672072-1-Liam.Howlett@oracle=
.com
Signed-off-by: Will Deacon <will@kernel.org>
Cc: David Howells <dhowells@redhat.com>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Cc: SeongJae Park <sj@kernel.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
 arch/arm64/kernel/elfcore.c | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/arch/arm64/kernel/elfcore.c b/arch/arm64/kernel/elfcore.c
index 98d67444a5b6..27ef7ad3ffd2 100644
--- a/arch/arm64/kernel/elfcore.c
+++ b/arch/arm64/kernel/elfcore.c
@@ -8,9 +8,9 @@
 #include <asm/cpufeature.h>
 #include <asm/mte.h>
=20
-#define for_each_mte_vma(tsk, vma)					\
+#define for_each_mte_vma(vmi, vma)					\
 	if (system_supports_mte())					\
-		for (vma =3D tsk->mm->mmap; vma; vma =3D vma->vm_next)	\
+		for_each_vma(vmi, vma)					\
 			if (vma->vm_flags & VM_MTE)
=20
 static unsigned long mte_vma_tag_dump_size(struct vm_area_struct *vma)
@@ -81,8 +81,9 @@ Elf_Half elf_core_extra_phdrs(void)
 {
 	struct vm_area_struct *vma;
 	int vma_count =3D 0;
+	VMA_ITERATOR(vmi, current->mm, 0);
=20
-	for_each_mte_vma(current, vma)
+	for_each_mte_vma(vmi, vma)
 		vma_count++;
=20
 	return vma_count;
@@ -91,8 +92,9 @@ Elf_Half elf_core_extra_phdrs(void)
 int elf_core_write_extra_phdrs(struct coredump_params *cprm, loff_t offset=
)
 {
 	struct vm_area_struct *vma;
+	VMA_ITERATOR(vmi, current->mm, 0);
=20
-	for_each_mte_vma(current, vma) {
+	for_each_mte_vma(vmi, vma) {
 		struct elf_phdr phdr;
=20
 		phdr.p_type =3D PT_AARCH64_MEMTAG_MTE;
@@ -116,8 +118,9 @@ size_t elf_core_extra_data_size(void)
 {
 	struct vm_area_struct *vma;
 	size_t data_size =3D 0;
+	VMA_ITERATOR(vmi, current->mm, 0);
=20
-	for_each_mte_vma(current, vma)
+	for_each_mte_vma(vmi, vma)
 		data_size +=3D mte_vma_tag_dump_size(vma);
=20
 	return data_size;
@@ -126,8 +129,9 @@ size_t elf_core_extra_data_size(void)
 int elf_core_write_extra_data(struct coredump_params *cprm)
 {
 	struct vm_area_struct *vma;
+	VMA_ITERATOR(vmi, current->mm, 0);
=20
-	for_each_mte_vma(current, vma) {
+	for_each_mte_vma(vmi, vma) {
 		if (vma->vm_flags & VM_DONTDUMP)
 			continue;
=20
--=20
2.35.1