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| author |   Hou Tao <houtao1@huawei.com> | 2022-12-16 12:23:53 +0800 |
|---|---|---|
| committer |   Mike Snitzer <snitzer@kernel.org> | 2023-02-17 14:49:21 -0500 |
| commit | a2f998a78a425edde5a1a1973c1d4854fe9d019f (patch) | |
| tree | 291cf12c7f177e9c60fbc9a0772b69364f64cf80 /scripts/generate_rust_analyzer.py | |
| parent | dm ioctl: assert _hash_lock is held in __hash_remove (diff) | |
| download | linux-rng-a2f998a78a425edde5a1a1973c1d4854fe9d019f.tar.xz linux-rng-a2f998a78a425edde5a1a1973c1d4854fe9d019f.zip | |
dm ioctl: remove unnecessary check when using dm_get_mdptr()
__hash_remove() removes hash_cell with _hash_lock locked, so acquiring
_hash_lock can guarantee no-NULL hc returned from dm_get_mdptr() must
have not been removed and hc->md must still be md.
__hash_remove() also acquires dm_hash_cells_mutex before setting mdptr
as NULL. So in dm_copy_name_and_uuid(), after acquiring
dm_hash_cells_mutex and ensuring returned hc is not NULL, the returned
hc must still be alive and hc->md must still be md.
Remove the unnecessary hc->md != md checks when using dm_get_mdptr()
with _hash_lock or dm_hash_cells_mutex acquired.
Signed-off-by: Hou Tao <houtao1@huawei.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Diffstat (limited to 'scripts/generate_rust_analyzer.py')
0 files changed, 0 insertions, 0 deletions