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rcu: Flag need for rcu_node_tree.h and rcu_segcblist.h visibility 

The rcu_node_tree.h and rcu_segcblist.h header files in the include/linux
directory might appear at first sight to be internal to the RCU
implementation.  However, the definitions in these files are needed to
determine the size of TREE SRCU's srcu_struct structure, so they must
be externally visible, which is why they live in include/linux.

This commit adds comments to this effect to those files.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
This commit is contained in:
Paul E. McKenney 2017-05-02 09:39:09 -07:00
parent 6b5fc3a133
commit aaaad0bfac
2 changed files with 8 additions and 0 deletions
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4
include/linux/rcu_node_tree.h
View File

@ -7,6 +7,10 @@
* unlimited scalability while maintaining a constant level of contention * unlimited scalability while maintaining a constant level of contention
* on the root node. * on the root node.
* *
* This seemingly RCU-private file must be available to SRCU users
* because the size of the TREE SRCU srcu_struct structure depends
* on these definitions.
*
* This program is free software; you can redistribute it and/or modify * This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by * it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or * the Free Software Foundation; either version 2 of the License, or

4
include/linux/rcu_segcblist.h
View File

@ -1,6 +1,10 @@
/* /*
* RCU segmented callback lists * RCU segmented callback lists
* *
* This seemingly RCU-private file must be available to SRCU users
* because the size of the TREE SRCU srcu_struct structure depends
* on these definitions.
*
* This program is free software; you can redistribute it and/or modify * This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by * it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or * the Free Software Foundation; either version 2 of the License, or