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| author | Liam R. Howlett <Liam.Howlett@Oracle.com> | 2022-09-06 19:48:48 +0000 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2022-09-26 19:46:16 -0700 |
| commit | 524e00b36e8c547f5582eef3fb645a8d9fc5e3df (patch) | |
| tree | 9bc59d81befe527c3fd2fba8eae465b4eaeaad8d /mm/util.c | |
| parent | 0c563f148043569c81724ee0f9c5bad5a36b115a (diff) | |
| download | linux-524e00b36e8c547f5582eef3fb645a8d9fc5e3df.tar.gz linux-524e00b36e8c547f5582eef3fb645a8d9fc5e3df.tar.bz2 linux-524e00b36e8c547f5582eef3fb645a8d9fc5e3df.zip | |
mm: remove rb tree.
Remove the RB tree and start using the maple tree for vm_area_struct
tracking.
Drop validate_mm() calls in expand_upwards() and expand_downwards() as the
lock is not held.
Link: https://lkml.kernel.org/r/20220906194824.2110408-18-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/util.c')
| -rw-r--r-- | mm/util.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/mm/util.c b/mm/util.c index 8d944ce71e94..10effe256dfa 100644 --- a/mm/util.c +++ b/mm/util.c @@ -288,6 +288,8 @@ void __vma_link_list(struct mm_struct *mm, struct vm_area_struct *vma, vma->vm_next = next; if (next) next->vm_prev = vma; + else + mm->highest_vm_end = vm_end_gap(vma); } void __vma_unlink_list(struct mm_struct *mm, struct vm_area_struct *vma) @@ -300,8 +302,14 @@ void __vma_unlink_list(struct mm_struct *mm, struct vm_area_struct *vma) prev->vm_next = next; else mm->mmap = next; - if (next) + if (next) { next->vm_prev = prev; + } else { + if (prev) + mm->highest_vm_end = vm_end_gap(prev); + else + mm->highest_vm_end = 0; + } } /* Check if the vma is being used as a stack by this task */ |