linux-kernel - [PATCH v4 44/49] mm/mremap: Convert vma_adjust() to vma

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Date:   Fri, 20 Jan 2023 11:26:45 -0500
From:   "Liam R. Howlett" <Liam.Howlett@...cle.com>
To:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        maple-tree@...ts.infradead.org
Cc:     "Liam R. Howlett" <Liam.Howlett@...cle.com>
Subject: [PATCH v4 44/49] mm/mremap: Convert vma_adjust() to vma_expand()

Stop using vma_adjust() in preparation for removing the function.
Export vma_expand() to use instead.

Signed-off-by: Liam R. Howlett <Liam.Howlett@...cle.com>
---
 include/linux/mm.h | 3 +++
 mm/mmap.c          | 6 +++---
 mm/mremap.c        | 4 ++--
 3 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index c372c09e11b5..287e340ced01 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2839,6 +2839,9 @@ static inline int vma_adjust(struct vma_iterator *vmi,
 {
 	return __vma_adjust(vmi, vma, start, end, pgoff, NULL);
 }
+extern int vma_expand(struct vma_iterator *vmi, struct vm_area_struct *vma,
+		      unsigned long start, unsigned long end, pgoff_t pgoff,
+		      struct vm_area_struct *next);
 extern struct vm_area_struct *vma_merge(struct vma_iterator *vmi,
 	struct mm_struct *, struct vm_area_struct *prev, unsigned long addr,
 	unsigned long end, unsigned long vm_flags, struct anon_vma *,
diff --git a/mm/mmap.c b/mm/mmap.c
index c1eb353c16f8..4bb8d219b53f 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -637,9 +637,9 @@ static inline void vma_complete(struct vma_prepare *vp,
  *
  * Returns: 0 on success
  */
-inline int vma_expand(struct vma_iterator *vmi, struct vm_area_struct *vma,
-		      unsigned long start, unsigned long end, pgoff_t pgoff,
-		      struct vm_area_struct *next)
+int vma_expand(struct vma_iterator *vmi, struct vm_area_struct *vma,
+	       unsigned long start, unsigned long end, pgoff_t pgoff,
+	       struct vm_area_struct *next)
 {
 	bool remove_next = false;
 	struct vma_prepare vp;
diff --git a/mm/mremap.c b/mm/mremap.c
index 30eea37f9fc4..1b3ee02bead7 100644
--- a/mm/mremap.c
+++ b/mm/mremap.c
@@ -1052,8 +1052,8 @@ SYSCALL_DEFINE5(mremap, unsigned long, addr, unsigned long, old_len,
 					extension_end, vma->vm_flags, vma->anon_vma,
 					vma->vm_file, extension_pgoff, vma_policy(vma),
 					vma->vm_userfaultfd_ctx, anon_vma_name(vma));
-			} else if (vma_adjust(&vmi, vma, vma->vm_start,
-					addr + new_len, vma->vm_pgoff)) {
+			} else if (vma_expand(&vmi, vma, vma->vm_start,
+					addr + new_len, vma->vm_pgoff, NULL)) {
 				vma = NULL;
 			}
 			if (!vma) {
-- 
2.35.1