mm/mmap: change do_brk_munmap() to use do_mas_align_munmap()

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>

diff --git a/mm/mmap.c b/mm/mmap.c
index 280fc2d2854e0d4820d4864497bcb04369d71d79..29494ff6c0e674afb9e9b38793a7201182902e00 100644 (file)
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -3085,7 +3085,7 @@ static int do_brk_munmap(struct ma_state *mas, struct vm_area_struct *vma,
        int ret;
 
        arch_unmap(mm, newbrk, oldbrk);
-       ret = do_mas_munmap(mas, mm, newbrk, oldbrk-newbrk, uf, true);
+       ret = do_mas_align_munmap(mas, vma, mm, newbrk, oldbrk, uf, true);
        validate_mm_mt(mm);
        return ret;
 }