maple_tree: avoid extra gap calculation

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Prior to ending the ascension loop of larger operations like split,
rebalance, and spanning store the gap in the node had been calculated. 
Once the node is inserted into the tree, the gap is recalculated in
mas_update_gap().  This can be avoided by creating a helper for
mas_update_gap() that accepts the known gap value, which reduces the
operations required for gap updating path.

Link: https://lore.kernel.org/20260821192627.4085470-19-liam@infradead.org
Signed-off-by: Liam R. Howlett (Oracle) <liam@infradead.org>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Breno Leitao <leitao@debian.org>
Cc: Chris Mason <clm@meta.com>
Cc: Chuck Lever <cel@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Joe Perches <joe@perches.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@surriel.com>
Cc: Waiman Long <longman@redhat.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

...

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Liam R. Howlett (Oracle) 2026-08-21 15:26:26 -04:00 • committed by Andrew Morton

parent 00f67814a1

commit 4e4fe9d727

1 changed files with 17 additions and 11 deletions

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lib/maple_tree.c

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