The patch titled
Subject: mm/mmap: introduce vma_range_init()
has been added to the -mm mm-unstable branch. Its filename is
mm-mmap-introduce-vma_range_init.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-mmap-introduce-vma_range_init.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: Yajun Deng <yajun.deng@xxxxxxxxx>
Subject: mm/mmap: introduce vma_range_init()
Date: Thu, 11 Jan 2024 10:15:26 +0800
There is a lot of code that needs to set the range of a vma. Introduce
vma_range_init() to initialize the range of vma.
Link: https://lkml.kernel.org/r/20240111021526.3461825-1-yajun.deng@xxxxxxxxx
Signed-off-by: Yajun Deng <yajun.deng@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/mm.h | 9 +++++++++
mm/mmap.c | 29 +++++++----------------------
2 files changed, 16 insertions(+), 22 deletions(-)
--- a/include/linux/mm.h~mm-mmap-introduce-vma_range_init
+++ a/include/linux/mm.h
@@ -3516,6 +3516,15 @@ static inline bool range_in_vma(struct v
return (vma && vma->vm_start <= start && end <= vma->vm_end);
}
+static inline void vma_range_init(struct vm_area_struct *vma,
+ unsigned long start, unsigned long end,
+ pgoff_t pgoff)
+{
+ vma->vm_start = start;
+ vma->vm_end = end;
+ vma->vm_pgoff = pgoff;
+}
+
#ifdef CONFIG_MMU
pgprot_t vm_get_page_prot(unsigned long vm_flags);
void vma_set_page_prot(struct vm_area_struct *vma);
--- a/mm/mmap.c~mm-mmap-introduce-vma_range_init
+++ a/mm/mmap.c
@@ -663,9 +663,7 @@ int vma_expand(struct vma_iterator *vmi,
vma_prepare(&vp);
vma_adjust_trans_huge(vma, start, end, 0);
- vma->vm_start = start;
- vma->vm_end = end;
- vma->vm_pgoff = pgoff;
+ vma_range_init(vma, start, end, pgoff);
vma_iter_store(vmi, vma);
vma_complete(&vp, vmi, vma->vm_mm);
@@ -708,9 +706,7 @@ int vma_shrink(struct vma_iterator *vmi,
vma_adjust_trans_huge(vma, start, end, 0);
vma_iter_clear(vmi);
- vma->vm_start = start;
- vma->vm_end = end;
- vma->vm_pgoff = pgoff;
+ vma_range_init(vma, start, end, pgoff);
vma_complete(&vp, vmi, vma->vm_mm);
return 0;
}
@@ -1015,10 +1011,7 @@ static struct vm_area_struct
vma_prepare(&vp);
vma_adjust_trans_huge(vma, vma_start, vma_end, adj_start);
-
- vma->vm_start = vma_start;
- vma->vm_end = vma_end;
- vma->vm_pgoff = vma_pgoff;
+ vma_range_init(vma, vma_start, vma_end, vma_pgoff);
if (vma_expanded)
vma_iter_store(vmi, vma);
@@ -2809,11 +2802,9 @@ cannot_expand:
}
vma_iter_config(&vmi, addr, end);
- vma->vm_start = addr;
- vma->vm_end = end;
+ vma_range_init(vma, addr, end, pgoff);
vm_flags_init(vma, vm_flags);
vma->vm_page_prot = vm_get_page_prot(vm_flags);
- vma->vm_pgoff = pgoff;
if (file) {
vma->vm_file = get_file(file);
@@ -3163,9 +3154,7 @@ static int do_brk_flags(struct vma_itera
goto unacct_fail;
vma_set_anonymous(vma);
- vma->vm_start = addr;
- vma->vm_end = addr + len;
- vma->vm_pgoff = addr >> PAGE_SHIFT;
+ vma_range_init(vma, addr, addr + len, addr >> PAGE_SHIFT);
vm_flags_init(vma, flags);
vma->vm_page_prot = vm_get_page_prot(flags);
vma_start_write(vma);
@@ -3402,9 +3391,7 @@ struct vm_area_struct *copy_vma(struct v
new_vma = vm_area_dup(vma);
if (!new_vma)
goto out;
- new_vma->vm_start = addr;
- new_vma->vm_end = addr + len;
- new_vma->vm_pgoff = pgoff;
+ vma_range_init(new_vma, addr, addr + len, pgoff);
if (vma_dup_policy(vma, new_vma))
goto out_free_vma;
if (anon_vma_clone(new_vma, vma))
@@ -3572,9 +3559,7 @@ static struct vm_area_struct *__install_
if (unlikely(vma == NULL))
return ERR_PTR(-ENOMEM);
- vma->vm_start = addr;
- vma->vm_end = addr + len;
-
+ vma_range_init(vma, addr, addr + len, 0);
vm_flags_init(vma, (vm_flags | mm->def_flags |
VM_DONTEXPAND | VM_SOFTDIRTY) & ~VM_LOCKED_MASK);
vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);
_
Patches currently in -mm which might be from yajun.deng@xxxxxxxxx are
mm-mmap-simplify-vma-link-and-unlink.patch
mm-mmap-introduce-vma_range_init.patch
