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| author | Liam R. Howlett <Liam.Howlett@Oracle.com> | 2022-09-06 19:48:50 +0000 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2022-09-26 19:46:17 -0700 |
| commit | abdba2dda0c477ca708a939b02f9b2e74666ed2d (patch) | |
| tree | c634443af9c5026c42d8b3effb20de631bbb38d0 /mm/nommu.c | |
| parent | 2e7ce7d354f2fae4c9becb8af799cbedf4f71665 (diff) | |
| download | lwn-abdba2dda0c477ca708a939b02f9b2e74666ed2d.tar.gz lwn-abdba2dda0c477ca708a939b02f9b2e74666ed2d.zip | |
mm: use maple tree operations for find_vma_intersection()
Move find_vma_intersection() to mmap.c and change implementation to maple
tree.
When searching for a vma within a range, it is easier to use the maple
tree interface.
Exported find_vma_intersection() for kvm module.
Link: https://lkml.kernel.org/r/20220906194824.2110408-24-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
Tested-by: Yu Zhao <yuzhao@google.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Cc: SeongJae Park <sj@kernel.org>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/nommu.c')
| -rw-r--r-- | mm/nommu.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/mm/nommu.c b/mm/nommu.c index 321c7e6718a8..2702790d05d3 100644 --- a/mm/nommu.c +++ b/mm/nommu.c @@ -642,6 +642,17 @@ static void delete_vma(struct mm_struct *mm, struct vm_area_struct *vma) vm_area_free(vma); } +struct vm_area_struct *find_vma_intersection(struct mm_struct *mm, + unsigned long start_addr, + unsigned long end_addr) +{ + unsigned long index = start_addr; + + mmap_assert_locked(mm); + return mt_find(&mm->mm_mt, &index, end_addr - 1); +} +EXPORT_SYMBOL(find_vma_intersection); + /* * look up the first VMA in which addr resides, NULL if none * - should be called with mm->mmap_lock at least held readlocked |