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maple_tree: introduce mas_wr_prealloc_setup()

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Introduce a helper function, mas_wr_prealoc_setup(), that will set up a
maple write state in order to start a walk of a maple tree.

Link: https://lkml.kernel.org/r/20240814161944.55347-3-sidhartha.kumar@oracle.com
Signed-off-by: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Cc: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Sidhartha Kumar 2024-08-14 12:19:29 -04:00 committed by Andrew Morton
parent bd164d81a7
commit 19138a2cc1
1 changed files with 8 additions and 2 deletions
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10
lib/maple_tree.c
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@ -5399,6 +5399,13 @@ static void mas_wr_store_setup(struct ma_wr_state *wr_mas)
mas_reset(wr_mas->mas);
}
static inline void mas_wr_prealloc_setup(struct ma_wr_state *wr_mas)
{
struct ma_state *mas = wr_mas->mas;
mas_wr_store_setup(wr_mas);
wr_mas->content = mas_start(mas);
}
/* Interface */
/**
@ -5509,8 +5516,7 @@ int mas_preallocate(struct ma_state *mas, void *entry, gfp_t gfp)
if (unlikely(!mas->index && mas->last == ULONG_MAX))
goto ask_now;
mas_wr_store_setup(&wr_mas);
wr_mas.content = mas_start(mas);
mas_wr_prealloc_setup(&wr_mas);
/* Root expand */
if (unlikely(mas_is_none(mas) || mas_is_ptr(mas)))
goto ask_now;