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Date: Wed, 10 May 2023 14:10:49 +0800
From: Peng Zhang <zhangpeng.00@...edance.com>
To: Liam.Howlett@...cle.com
Cc: akpm@...ux-foundation.org, linux-mm@...ck.org,
linux-kernel@...r.kernel.org, maple-tree@...ts.infradead.org,
Peng Zhang <zhangpeng.00@...edance.com>
Subject: [PATCH 2/2] maple_tree: Drop mtree_alloc_{range,rrange}() and related functions.
Drop mtree_alloc_{range,rrange}(), mas_alloc() and mas_fill_gap().
mtree_alloc_{range,rrange}() currently have no users and can be easily
implemented with mas_empty_area{_rev}(). mas_alloc() and mas_fill_gap()
are just their internal functions, drop them together.
Signed-off-by: Peng Zhang <zhangpeng.00@...edance.com>
---
include/linux/maple_tree.h | 7 --
lib/maple_tree.c | 177 -------------------------------------
2 files changed, 184 deletions(-)
diff --git a/include/linux/maple_tree.h b/include/linux/maple_tree.h
index 542b09118a09f..3dd6edccf83af 100644
--- a/include/linux/maple_tree.h
+++ b/include/linux/maple_tree.h
@@ -306,13 +306,6 @@ int mtree_insert(struct maple_tree *mt, unsigned long index,
void *entry, gfp_t gfp);
int mtree_insert_range(struct maple_tree *mt, unsigned long first,
unsigned long last, void *entry, gfp_t gfp);
-int mtree_alloc_range(struct maple_tree *mt, unsigned long *startp,
- void *entry, unsigned long size, unsigned long min,
- unsigned long max, gfp_t gfp);
-int mtree_alloc_rrange(struct maple_tree *mt, unsigned long *startp,
- void *entry, unsigned long size, unsigned long min,
- unsigned long max, gfp_t gfp);
-
int mtree_store_range(struct maple_tree *mt, unsigned long first,
unsigned long last, void *entry, gfp_t gfp);
int mtree_store(struct maple_tree *mt, unsigned long index,
diff --git a/lib/maple_tree.c b/lib/maple_tree.c
index b37065a6f570d..49dfe81dfa1b6 100644
--- a/lib/maple_tree.c
+++ b/lib/maple_tree.c
@@ -5120,46 +5120,6 @@ static inline void mas_awalk(struct ma_state *mas, unsigned long size)
}
}
-/*
- * mas_fill_gap() - Fill a located gap with @entry.
- * @mas: The maple state
- * @entry: The value to store
- * @slot: The offset into the node to store the @entry
- * @size: The size of the entry
- * @index: The start location
- */
-static inline void mas_fill_gap(struct ma_state *mas, void *entry,
- unsigned char slot, unsigned long size, unsigned long *index)
-{
- MA_WR_STATE(wr_mas, mas, entry);
- unsigned char pslot = mte_parent_slot(mas->node);
- struct maple_enode *mn = mas->node;
- unsigned long *pivots;
- enum maple_type ptype;
- /*
- * mas->index is the start address for the search
- * which may no longer be needed.
- * mas->last is the end address for the search
- */
-
- *index = mas->index;
- mas->last = mas->index + size - 1;
-
- /*
- * It is possible that using mas->max and mas->min to correctly
- * calculate the index and last will cause an issue in the gap
- * calculation, so fix the ma_state here
- */
- mas_ascend(mas);
- ptype = mte_node_type(mas->node);
- pivots = ma_pivots(mas_mn(mas), ptype);
- mas->max = mas_safe_pivot(mas, pivots, pslot, ptype);
- mas->min = mas_safe_min(mas, pivots, pslot);
- mas->node = mn;
- mas->offset = slot;
- mas_wr_store_entry(&wr_mas);
-}
-
/*
* mas_sparse_area() - Internal function. Return upper or lower limit when
* searching for a gap in an empty tree.
@@ -5307,74 +5267,6 @@ int mas_empty_area_rev(struct ma_state *mas, unsigned long min,
}
EXPORT_SYMBOL_GPL(mas_empty_area_rev);
-static inline int mas_alloc(struct ma_state *mas, void *entry,
- unsigned long size, unsigned long *index)
-{
- unsigned long min;
-
- mas_start(mas);
- if (mas_is_none(mas) || mas_is_ptr(mas)) {
- mas_root_expand(mas, entry);
- if (mas_is_err(mas))
- return xa_err(mas->node);
-
- if (!mas->index)
- return mas_pivot(mas, 0);
- return mas_pivot(mas, 1);
- }
-
- /* Must be walking a tree. */
- mas_awalk(mas, size);
- if (mas_is_err(mas))
- return xa_err(mas->node);
-
- if (mas->offset == MAPLE_NODE_SLOTS)
- goto no_gap;
-
- /*
- * At this point, mas->node points to the right node and we have an
- * offset that has a sufficient gap.
- */
- min = mas->min;
- if (mas->offset)
- min = mas_pivot(mas, mas->offset - 1) + 1;
-
- if (mas_is_err(mas))
- return xa_err(mas->node);
-
- if (mas->index < min)
- mas->index = min;
-
- mas_fill_gap(mas, entry, mas->offset, size, index);
- return 0;
-
-no_gap:
- return -EBUSY;
-}
-
-static inline int mas_rev_alloc(struct ma_state *mas, unsigned long min,
- unsigned long max, void *entry,
- unsigned long size, unsigned long *index)
-{
- int ret = 0;
-
- ret = mas_empty_area_rev(mas, min, max, size);
- if (ret)
- return ret;
-
- if (mas_is_err(mas))
- return xa_err(mas->node);
-
- if (mas->offset == MAPLE_NODE_SLOTS)
- goto no_gap;
-
- mas_fill_gap(mas, entry, mas->offset, size, index);
- return 0;
-
-no_gap:
- return -EBUSY;
-}
-
/*
* mte_dead_leaves() - Mark all leaves of a node as dead.
* @mas: The maple state
@@ -6481,75 +6373,6 @@ int mtree_insert(struct maple_tree *mt, unsigned long index, void *entry,
}
EXPORT_SYMBOL(mtree_insert);
-int mtree_alloc_range(struct maple_tree *mt, unsigned long *startp,
- void *entry, unsigned long size, unsigned long min,
- unsigned long max, gfp_t gfp)
-{
- int ret = 0;
-
- MA_STATE(mas, mt, min, min);
- if (!mt_is_alloc(mt))
- return -EINVAL;
-
- if (WARN_ON_ONCE(mt_is_reserved(entry)))
- return -EINVAL;
-
- if (min > max)
- return -EINVAL;
-
- if (max < size)
- return -EINVAL;
-
- if (!size)
- return -EINVAL;
-
- mtree_lock(mt);
-retry:
- mas.offset = 0;
- mas.index = min;
- mas.last = max - size + 1;
- ret = mas_alloc(&mas, entry, size, startp);
- if (mas_nomem(&mas, gfp))
- goto retry;
-
- mtree_unlock(mt);
- return ret;
-}
-EXPORT_SYMBOL(mtree_alloc_range);
-
-int mtree_alloc_rrange(struct maple_tree *mt, unsigned long *startp,
- void *entry, unsigned long size, unsigned long min,
- unsigned long max, gfp_t gfp)
-{
- int ret = 0;
-
- MA_STATE(mas, mt, min, max - size + 1);
- if (!mt_is_alloc(mt))
- return -EINVAL;
-
- if (WARN_ON_ONCE(mt_is_reserved(entry)))
- return -EINVAL;
-
- if (min > max)
- return -EINVAL;
-
- if (max < size - 1)
- return -EINVAL;
-
- if (!size)
- return -EINVAL;
-
- mtree_lock(mt);
-retry:
- ret = mas_rev_alloc(&mas, min, max, entry, size, startp);
- if (mas_nomem(&mas, gfp))
- goto retry;
-
- mtree_unlock(mt);
- return ret;
-}
-EXPORT_SYMBOL(mtree_alloc_rrange);
-
/**
* mtree_erase() - Find an index and erase the entire range.
* @mt: The maple tree
--
2.20.1
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