Commit 66cf8f14 authored by Paul E. McKenney's avatar Paul E. McKenney Committed by Linus Torvalds

[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: <paulmck@us.ibm.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent f246315e
...@@ -48,3 +48,18 @@ When: April 2005 ...@@ -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>
...@@ -465,6 +465,6 @@ void synchronize_kernel(void) ...@@ -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. */
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