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Commit 66cf8f14 authored by Paul E. McKenney's avatar Paul E. McKenney Committed by Linus Torvalds
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[PATCH] kernel/rcupdate.c: make the exports EXPORT_SYMBOL_GPL 

The gpl exports need to be put back.  Moving them to GPL -- but in a
measured manner, as I proposed on this list some months ago -- is fine.
Changing these particular exports precipitously is most definitely -not-
fine.  Here is my earlier proposal:

	http://marc.theaimsgroup.com/?l=linux-kernel&m=110520930301813&w=2



See below for a patch that puts the exports back, along with an updated
version of my earlier patch that starts the process of moving them to GPL.
I will also be following this message with RFC patches that introduce two
(EXPORT_SYMBOL_GPL) interfaces to replace synchronize_kernel(), which then
becomes deprecated.

Signed-off-by: default avatar <paulmck@us.ibm.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent f246315e

Documentation/feature-removal-schedule.txt

+15 −0
Original line number Original line Diff line number Diff line
@@ -48,3 +48,18 @@ When: April 2005 
Why:	Replaced by ->compat_ioctl in file_operations and other method

Why:	Replaced by ->compat_ioctl in file_operations and other method

	vecors.

	vecors.

Who:	Andi Kleen <ak@muc.de>, Christoph Hellwig <hch@lst.de>

Who:	Andi Kleen <ak@muc.de>, Christoph Hellwig <hch@lst.de>



---------------------------



What:	RCU API moves to EXPORT_SYMBOL_GPL

When:	April 2006

Files:	include/linux/rcupdate.h, kernel/rcupdate.c

Why:	Outside of Linux, the only implementations of anything even

	vaguely resembling RCU that I am aware of are in DYNIX/ptx,

	VM/XA, Tornado, and K42.  I do not expect anyone to port binary

	drivers or kernel modules from any of these, since the first two

	are owned by IBM and the last two are open-source research OSes.

	So these will move to GPL after a grace period to allow

	people, who might be using implementations that I am not aware

	of, to adjust to this upcoming change.

Who:	Paul E. McKenney <paulmck@us.ibm.com>

kernel/rcupdate.c

+3 −3
Original line number Original line Diff line number Diff line
@@ -465,6 +465,6 @@ void synchronize_kernel(void) 
}

}





module_param(maxbatch, int, 0);

module_param(maxbatch, int, 0);

EXPORT_SYMBOL_GPL(call_rcu);

EXPORT_SYMBOL(call_rcu);  /* WARNING: GPL-only in April 2006. */

EXPORT_SYMBOL_GPL(call_rcu_bh);

EXPORT_SYMBOL(call_rcu_bh);  /* WARNING: GPL-only in April 2006. */

EXPORT_SYMBOL_GPL(synchronize_kernel);
 
EXPORT_SYMBOL(synchronize_kernel);  /* WARNING: GPL-only in April 2006. */