Commit 19138a2c authored by Sidhartha Kumar's avatar Sidhartha Kumar Committed by Andrew Morton
Browse files

maple_tree: introduce mas_wr_prealloc_setup() 

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: default avatarSidhartha 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: default avatarAndrew Morton <akpm@linux-foundation.org>
parent bd164d81

lib/maple_tree.c

+8 −2
Original line number Diff line number Diff line
@@ -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;