Re: [PATCH 2/2] maple_tree: remove sanity check from mas_wr_slot_store()

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On 10/15/24 8:22 PM, Wei Yang wrote:
After commit 5d659bbb52a2 ("maple_tree: introduce mas_wr_store_type()"),
the check here is redundant.

Let's remove it.

Signed-off-by: Wei Yang <richard.weiyang@xxxxxxxxx>
CC: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
CC: Sidhartha Kumar <sidhartha.kumar@xxxxxxxxxx>
CC: Lorenzo Stoakes <lorenzo.stoakes@xxxxxxxxxx>
---
  lib/maple_tree.c | 4 +---
  1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/lib/maple_tree.c b/lib/maple_tree.c
index f2628e3f3efc..5dfc589a8cde 100644
--- a/lib/maple_tree.c
+++ b/lib/maple_tree.c
@@ -3810,7 +3810,7 @@ static inline void mas_wr_slot_store(struct ma_wr_state *wr_mas)
  			wr_mas->pivots[offset] = mas->index - 1;
  			mas->offset++; /* Keep mas accurate. */
  		}
-	} else if (!mt_in_rcu(mas->tree)) {


This means ((new_end == mas->end) && (!mt_in_rcu(mas->tree)) must be true so we know we are not in rcu mode at this point. So this makes sense

+	} else {
  		/*
  		 * Expand the range, only partially overwriting the previous and
  		 * next ranges
@@ -3820,8 +3820,6 @@ static inline void mas_wr_slot_store(struct ma_wr_state *wr_mas)
  		wr_mas->pivots[offset] = mas->index - 1;
  		wr_mas->pivots[offset + 1] = mas->last;
  		mas->offset++; /* Keep mas accurate. */
-	} else {
-		return;
  	}
trace_ma_write(__func__, mas, 0, wr_mas->entry);

Reviewed-by: Sidhartha Kumar <sidhartha.kumar@xxxxxxxxxx>





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