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Code Issues Releases Wiki Activity

maple_tree: remove mas_searchable()

Browse source 
Now that the status of the maple state is outside of the node, the
mas_searchable() function can be dropped for easier open-coding of what is
going on.

Link: https://lkml.kernel.org/r/20231101171629.3612299-10-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Peng Zhang <zhangpeng.00@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Liam R. Howlett 2023-11-01 13:16:26 -04:00 committed by Andrew Morton
parent 067311d33e
commit 9a40d45c1f
2 changed files with 19 additions and 51 deletions
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66
lib/maple_tree.c
View file

@ -285,17 +285,6 @@ static inline bool mas_is_underflow(struct ma_state *mas)
return mas->status == ma_underflow;
}
static inline bool mas_searchable(struct ma_state *mas)
{
if (mas_is_none(mas))
return false;
if (mas_is_ptr(mas))
return false;
return true;
}
static __always_inline struct maple_node *mte_to_node(
const struct maple_enode *entry)
{
@ -6030,12 +6019,11 @@ static __always_inline bool mas_find_setup(struct ma_state *mas, unsigned long m
}
if (unlikely(!mas_searchable(mas))) {
if (unlikely(mas_is_ptr(mas)))
goto ptr_out_of_range;
if (unlikely(mas_is_ptr(mas)))
goto ptr_out_of_range;
if (unlikely(mas_is_none(mas)))
return true;
}
if (mas->index == max)
return true;
@ -6162,20 +6150,18 @@ static bool mas_find_rev_setup(struct ma_state *mas, unsigned long min,
return true;
}
if (unlikely(!mas_searchable(mas))) {
if (mas_is_ptr(mas))
goto none;
if (unlikely(mas_is_ptr(mas)))
goto none;
if (mas_is_none(mas)) {
/*
* Walked to the location, and there was nothing so the
* previous location is 0.
*/
mas->last = mas->index = 0;
mas->status = ma_root;
*entry = mas_root(mas);
return true;
}
if (unlikely(mas_is_none(mas))) {
/*
* Walked to the location, and there was nothing so the previous
* location is 0.
*/
mas->last = mas->index = 0;
mas->status = ma_root;
*entry = mas_root(mas);
return true;
}
active:
@ -6905,7 +6891,7 @@ void *mt_find(struct maple_tree *mt, unsigned long *index, unsigned long max)
if (entry)
goto unlock;
while (mas_searchable(&mas) && (mas.last < max)) {
while (mas_is_active(&mas) && (mas.last < max)) {
entry = mas_next_entry(&mas, max);
if (likely(entry && !xa_is_zero(entry)))
break;
@ -6987,26 +6973,6 @@ unsigned int mt_nr_allocated(void)
return kmem_cache_nr_allocated(maple_node_cache);
}
/*
* mas_dead_node() - Check if the maple state is pointing to a dead node.
* @mas: The maple state
* @index: The index to restore in @mas.
*
* Used in test code.
* Return: 1 if @mas has been reset to MAS_START, 0 otherwise.
*/
static inline int mas_dead_node(struct ma_state *mas, unsigned long index)
{
if (unlikely(!mas_searchable(mas) || mas_is_start(mas)))
return 0;
if (likely(!mte_dead_node(mas->node)))
return 0;
mas_rewalk(mas, index);
return 1;
}
void mt_cache_shrink(void)
{
}
@ -7558,7 +7524,7 @@ void mt_validate(struct maple_tree *mt)
MA_STATE(mas, mt, 0, 0);
rcu_read_lock();
mas_start(&mas);
if (!mas_searchable(&mas))
if (!mas_is_active(&mas))
goto done;
while (!mte_is_leaf(mas.node))

4
tools/testing/radix-tree/maple.c
View file

@ -974,8 +974,10 @@ static inline void *mas_range_load(struct ma_state *mas,
if (likely(mas->offset != MAPLE_NODE_SLOTS))
entry = mas_get_slot(mas, mas->offset);
if (mas_dead_node(mas, index))
if (mas_is_active(mas) && mte_dead_node(mas->node)) {
mas_set(mas, index);
goto retry;
}
return entry;
}