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| author | Miaohe Lin <linmiaohe@huawei.com> | 2022-04-29 09:16:14 +0300 |
|---|---|---|
| committer | akpm <akpm@linux-foundation.org> | 2022-04-29 09:16:14 +0300 |
| commit | 3c9fe8b8f5e3e30bfa81eeeff4bc34c0fb67b739 (patch) | |
| tree | f6a07150f94cb5db7b0128f0825d10c508459c16 /include/linux/device | |
| parent | f433195679a9639a3af5be03bcb9c3d933e3b261 (diff) | |
| download | linux-3c9fe8b8f5e3e30bfa81eeeff4bc34c0fb67b739.tar.xz | |
mm/mremap: avoid unneeded do_munmap call
When old_len == new_len, do_munmap will return -EINVAL due to len == 0.
This errno will be simply ignored because of old_len != new_len check. So
it is unnecessary to call do_munmap when old_len == new_len because
nothing is actually done.
Link: https://lkml.kernel.org/r/20220401081023.37080-1-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Acked-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include/linux/device')
0 files changed, 0 insertions, 0 deletions