Messages in this thread Patch in this message |  | | From | Liam Howlett <> | Subject | [PATCH v11 29/69] mm/mmap: change do_brk_munmap() to use do_mas_align_munmap() | Date | Sun, 17 Jul 2022 02:46:46 +0000 |
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From: "Liam R. Howlett" <Liam.Howlett@Oracle.com>
do_brk_munmap() has already aligned the address and has a maple tree state to be used. Use the new do_mas_align_munmap() to avoid unnecessary alignment and error checks.
Link: https://lkml.kernel.org/r/20220504011345.662299-14-Liam.Howlett@oracle.com Link: https://lkml.kernel.org/r/20220519150509.1290067-1-Liam.Howlett@oracle.com Link: https://lkml.kernel.org/r/20220621204632.3370049-30-Liam.Howlett@oracle.com Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: David Howells <dhowells@redhat.com> Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org> Cc: SeongJae Park <sj@kernel.org> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Will Deacon <will@kernel.org> Cc: Davidlohr Bueso <dave@stgolabs.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> --- mm/mmap.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/mm/mmap.c b/mm/mmap.c index 7f5301ed0213..e4bfee3d2ae2 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -3092,14 +3092,14 @@ static int do_brk_munmap(struct ma_state *mas, struct vm_area_struct *vma, struct mm_struct *mm = vma->vm_mm; struct vm_area_struct unmap; unsigned long unmap_pages; - int ret = 1; + int ret; arch_unmap(mm, newbrk, oldbrk); - if (likely((vma->vm_end < oldbrk) || - ((vma->vm_start == newbrk) && (vma->vm_end == oldbrk)))) { + if (likely((vma->vm_end < oldbrk) || (vma->vm_start >= newbrk))) { /* remove entire mapping(s) */ - ret = do_mas_munmap(mas, mm, newbrk, oldbrk-newbrk, uf, true); + ret = do_mas_align_munmap(mas, vma, mm, newbrk, oldbrk, uf, + true); goto munmap_full_vma; } -- 2.35.1
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