From: Liam Howlett <liam.howlett@oracle.com>
To: "linux-mm@kvack.org" <linux-mm@kvack.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
"maple-tree@lists.infradead.org" <maple-tree@lists.infradead.org>
Cc: Liam Howlett <liam.howlett@oracle.com>,
Liam Howlett <liam.howlett@oracle.com>
Subject: [PATCH v3 14/48] mm: Add temporary vma iterator versions of vma_merge(), split_vma(), and __split_vma()
Date: Tue, 17 Jan 2023 02:34:14 +0000 [thread overview]
Message-ID: <20230117023335.1690727-15-Liam.Howlett@oracle.com> (raw)
In-Reply-To: <20230117023335.1690727-1-Liam.Howlett@oracle.com>
From: "Liam R. Howlett" <Liam.Howlett@Oracle.com>
These wrappers are short-lived in this patch set so that each user can
be converted on its own. In the end, these functions are renamed in one
commit.
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
---
include/linux/mm.h | 11 ++++++++++-
mm/mmap.c | 44 ++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 54 insertions(+), 1 deletion(-)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 126f94b6f434..14e3698fcbe7 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2834,11 +2834,20 @@ extern struct vm_area_struct *vma_merge(struct mm_struct *,
struct vm_area_struct *prev, unsigned long addr, unsigned long end,
unsigned long vm_flags, struct anon_vma *, struct file *, pgoff_t,
struct mempolicy *, struct vm_userfaultfd_ctx, struct anon_vma_name *);
+extern struct vm_area_struct *vmi_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 *,
+ struct file *, pgoff_t, struct mempolicy *, struct vm_userfaultfd_ctx,
+ struct anon_vma_name *);
extern struct anon_vma *find_mergeable_anon_vma(struct vm_area_struct *);
extern int __split_vma(struct mm_struct *, struct vm_area_struct *,
- unsigned long addr, int new_below);
+ unsigned long addr, int new_below);
+extern int vmi__split_vma(struct vma_iterator *vmi, struct mm_struct *,
+ struct vm_area_struct *, unsigned long addr, int new_below);
extern int split_vma(struct mm_struct *, struct vm_area_struct *,
unsigned long addr, int new_below);
+extern int vmi_split_vma(struct vma_iterator *vmi, struct mm_struct *,
+ struct vm_area_struct *, unsigned long addr, int new_below);
extern int insert_vm_struct(struct mm_struct *, struct vm_area_struct *);
extern void unlink_file_vma(struct vm_area_struct *);
extern struct vm_area_struct *copy_vma(struct vm_area_struct **,
diff --git a/mm/mmap.c b/mm/mmap.c
index 02083b2cacfa..1fd6962f440a 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1091,6 +1091,25 @@ struct vm_area_struct *vma_merge(struct mm_struct *mm,
return res;
}
+struct vm_area_struct *vmi_vma_merge(struct vma_iterator *vmi,
+ struct mm_struct *mm,
+ struct vm_area_struct *prev, unsigned long addr,
+ unsigned long end, unsigned long vm_flags,
+ struct anon_vma *anon_vma, struct file *file,
+ pgoff_t pgoff, struct mempolicy *policy,
+ struct vm_userfaultfd_ctx vm_userfaultfd_ctx,
+ struct anon_vma_name *anon_name)
+{
+ struct vm_area_struct *tmp;
+
+ tmp = vma_merge(mm, prev, addr, end, vm_flags, anon_vma, file, pgoff,
+ policy, vm_userfaultfd_ctx, anon_name);
+ if (tmp)
+ vma_iter_set(vmi, end);
+
+ return tmp;
+}
+
/*
* Rough compatibility check to quickly see if it's even worth looking
* at sharing an anon_vma.
@@ -2272,6 +2291,18 @@ int __split_vma(struct mm_struct *mm, struct vm_area_struct *vma,
validate_mm_mt(mm);
return err;
}
+int vmi__split_vma(struct vma_iterator *vmi, struct mm_struct *mm,
+ struct vm_area_struct *vma, unsigned long addr, int new_below)
+{
+ int ret;
+ unsigned long end = vma->vm_end;
+
+ ret = __split_vma(mm, vma, addr, new_below);
+ if (!ret)
+ vma_iter_set(vmi, end);
+
+ return ret;
+}
/*
* Split a vma into two pieces at address 'addr', a new vma is allocated
@@ -2286,6 +2317,19 @@ int split_vma(struct mm_struct *mm, struct vm_area_struct *vma,
return __split_vma(mm, vma, addr, new_below);
}
+int vmi_split_vma(struct vma_iterator *vmi, struct mm_struct *mm,
+ struct vm_area_struct *vma, unsigned long addr, int new_below)
+{
+ int ret;
+ unsigned long end = vma->vm_end;
+
+ ret = split_vma(mm, vma, addr, new_below);
+ if (!ret)
+ vma_iter_set(vmi, end);
+
+ return ret;
+}
+
static inline int munmap_sidetree(struct vm_area_struct *vma,
struct ma_state *mas_detach)
{
--
2.35.1
next prev parent reply other threads:[~2023-01-17 2:34 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-17 2:34 [PATCH v3 00/48] VMA tree type safety and remove __vma_adjust() Liam Howlett
2023-01-17 2:34 ` [PATCH v3 01/48] maple_tree: Add mas_init() function Liam Howlett
2023-01-17 2:34 ` [PATCH v3 03/48] maple_tree: Reduce user error potential Liam Howlett
2023-01-17 2:34 ` [PATCH v3 04/48] test_maple_tree: Test modifications while iterating Liam Howlett
2023-01-17 2:34 ` [PATCH v3 02/48] maple_tree: Fix potential rcu issue Liam Howlett
2023-01-17 2:34 ` [PATCH v3 06/48] maple_tree: Fix mas_prev() and mas_find() state handling Liam Howlett
2023-01-17 2:34 ` [PATCH v3 07/48] mm: Expand vma iterator interface Liam Howlett
2023-01-17 2:34 ` [PATCH v3 05/48] maple_tree: Fix handle of invalidated state in mas_wr_store_setup() Liam Howlett
2023-01-17 2:34 ` [PATCH v3 09/48] kernel/fork: Convert forking to using the vmi iterator Liam Howlett
2023-01-17 2:34 ` [PATCH v3 08/48] mm/mmap: convert brk to use vma iterator Liam Howlett
2023-01-17 2:34 ` [PATCH v3 10/48] mmap: Convert vma_link() " Liam Howlett
2023-01-17 2:34 ` [PATCH v3 12/48] mmap: Change do_mas_munmap and do_mas_aligned_munmap() to use " Liam Howlett
2023-01-17 2:34 ` [PATCH v3 11/48] mm/mmap: Remove preallocation from do_mas_align_munmap() Liam Howlett
2023-01-17 2:34 ` Liam Howlett [this message]
2023-01-17 2:34 ` [PATCH v3 15/48] ipc/shm: Use the vma iterator for munmap calls Liam Howlett
2023-01-17 2:34 ` [PATCH v3 13/48] mmap: Convert vma_expand() to use vma iterator Liam Howlett
2023-01-17 2:34 ` [PATCH v3 18/48] mlock: Convert mlock to " Liam Howlett
2023-01-17 2:34 ` [PATCH v3 16/48] userfaultfd: Use " Liam Howlett
2023-01-17 2:34 ` [PATCH v3 17/48] mm: Change mprotect_fixup to " Liam Howlett
2023-01-17 2:34 ` [PATCH v3 21/48] task_mmu: Convert " Liam Howlett
2023-01-17 2:34 ` [PATCH v3 19/48] coredump: " Liam Howlett
2023-01-17 2:34 ` [PATCH v3 20/48] mempolicy: " Liam Howlett
2023-01-17 2:34 ` [PATCH v3 22/48] sched: " Liam Howlett
2023-01-17 2:34 ` [PATCH v3 24/48] mmap: Pass through vmi iterator to __split_vma() Liam Howlett
2023-01-17 2:34 ` [PATCH v3 23/48] madvise: Use vmi iterator for __split_vma() and vma_merge() Liam Howlett
2023-01-17 2:34 ` [PATCH v3 25/48] mmap: Use vmi version of vma_merge() Liam Howlett
2023-01-17 2:34 ` [PATCH v3 27/48] nommu: Convert nommu to using the vma iterator Liam Howlett
2023-01-17 2:34 ` [PATCH v3 28/48] nommu: Pass through vma iterator to shrink_vma() Liam Howlett
2023-01-17 2:34 ` [PATCH v3 26/48] mm/mremap: Use vmi version of vma_merge() Liam Howlett
2023-01-17 2:34 ` [PATCH v3 31/48] mmap: Convert __vma_adjust() to use vma iterator Liam Howlett
2023-01-17 2:34 ` [PATCH v3 29/48] mm: Switch vma_merge(), split_vma(), and __split_vma to " Liam Howlett
2023-01-17 2:34 ` [PATCH v3 30/48] mm/damon: Stop using vma_mas_store() for maple tree store Liam Howlett
2023-01-17 19:11 ` SeongJae Park
2023-01-17 19:16 ` SeongJae Park
2023-01-17 22:20 ` Daniel Latypov
2023-01-17 22:47 ` Liam Howlett
2023-01-19 2:00 ` SeongJae Park
2023-01-19 18:55 ` Liam R. Howlett
2023-01-17 2:34 ` [PATCH v3 34/48] mm: Remove unnecessary write to vma iterator in __vma_adjust() Liam Howlett
2023-01-17 2:34 ` [PATCH v3 33/48] madvise: Use split_vma() instead of __split_vma() Liam Howlett
2023-01-17 2:34 ` [PATCH v3 35/48] mm: Pass vma iterator through to __vma_adjust() Liam Howlett
2023-01-17 2:34 ` [PATCH v3 32/48] mm: Pass through vma iterator " Liam Howlett
2023-01-17 2:34 ` [PATCH v3 38/48] mm: Change munmap splitting order and move_vma() Liam Howlett
2023-01-17 2:34 ` [PATCH v3 36/48] mm: Add vma iterator to vma_adjust() arguments Liam Howlett
2023-01-17 2:34 ` [PATCH v3 37/48] mmap: Clean up mmap_region() unrolling Liam Howlett
2023-01-17 2:34 ` [PATCH v3 39/48] mm/mmap: move anon_vma setting in __vma_adjust() Liam Howlett
2023-01-17 2:34 ` [PATCH v3 41/48] mm/mmap: Use vma_prepare() and vma_complete() in vma_expand() Liam Howlett
2023-01-17 2:34 ` [PATCH v3 40/48] mm/mmap: Refactor locking out of __vma_adjust() Liam Howlett
2023-01-17 2:34 ` [PATCH v3 42/48] mm/mmap: Introduce init_vma_prep() and init_multi_vma_prep() Liam Howlett
2023-01-17 2:34 ` [PATCH v3 43/48] mm: Don't use __vma_adjust() in __split_vma() Liam Howlett
2023-01-17 2:34 ` [PATCH v3 45/48] mm/mmap: Introduce dup_vma_anon() helper Liam Howlett
2023-01-17 2:34 ` [PATCH v3 44/48] mm/mmap: Don't use __vma_adjust() in shift_arg_pages() Liam Howlett
2023-01-17 2:34 ` [PATCH v3 47/48] mm/mmap: Remove __vma_adjust() Liam Howlett
2023-01-17 2:34 ` [PATCH v3 48/48] vma_merge: Set vma iterator to correct position Liam Howlett
2023-01-17 2:34 ` [PATCH v3 46/48] mm/mmap: Convert do_brk_flags() to use vma_prepare() and vma_complete() Liam Howlett
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