AuxXxilium/linux_dsm_epyc7002
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dm space map metadata: skip useless memcpy in metadata_ll_init_index()

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When metadata_ll_init_index() is called by sm_ll_new_metadata(),
ll->mi_le hasn't been initialized yet. So, when
metadata_ll_init_index() copies the contents of ll->mi_le into the
newly allocated bitmap_root, it is just copying garbage. ll->mi_le
will be allocated later in sm_ll_extend() and copied into the
bitmap_root, in sm_ll_commit().

Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Benjamin Marzinski 2016-12-02 15:14:17 -06:00 committed by Mike Snitzer
parent 314c25c56c
commit 0c79ce0b75
1 changed files with 0 additions and 1 deletions
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drivers/md/persistent-data/dm-space-map-common.c
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@ -547,7 +547,6 @@ static int metadata_ll_init_index(struct ll_disk *ll)
if (r < 0)
return r;
memcpy(dm_block_data(b), &ll->mi_le, sizeof(ll->mi_le));
ll->bitmap_root = dm_block_location(b);
dm_tm_unlock(ll->tm, b);