mm/vmalloc: make link_va()/unlink_va() common to different rb_root

Patch series "Reduce a vmalloc internal lock contention preparation work".

This small serias is preparation work to implement per-cpu vmalloc
allocation in order to reduce a high internal lock contention.  This
series does not introduce any functional changes, it is only about
preparation.


This patch (of 5):

Currently link_va() and unlik_va(), in order to figure out a tree type,
compares a passed root value with a global free_vmap_area_root variable to
distinguish the augmented rb-tree from a regular one.  It is hard coded
since such functions can manipulate only with specific
"free_vmap_area_root" tree that represents a global free vmap space.

Make it common by introducing "_augment" versions of both internal
functions, so it is possible to deal with different trees.

There is no functional change as a result of this patch.

Link: https://lkml.kernel.org/r/[email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Uladzislau Rezki (Sony) <[email protected]>
Reviewed-by: Baoquan He <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: Matthew Wilcox <[email protected]>
Cc: Nicholas Piggin <[email protected]>
Cc: Oleksiy Avramchenko <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

0 files changed, 0 insertions, 0 deletions