From: Paul E. McKenney Date: Sun, 1 May 2005 15:59:03 +0000 (-0700) Subject: [PATCH] kernel/rcupdate.c: make the exports EXPORT_SYMBOL_GPL X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=66cf8f1443301a1d5bc9c21709e4264e6919a3e1;p=deliverable%2Flinux.git [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: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt index 56627c1546de..d3c52dd24a2a 100644 --- a/Documentation/feature-removal-schedule.txt +++ b/Documentation/feature-removal-schedule.txt @@ -48,3 +48,18 @@ When: April 2005 Why: Replaced by ->compat_ioctl in file_operations and other method vecors. Who: Andi Kleen , Christoph Hellwig + +--------------------------- + +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 diff --git a/kernel/rcupdate.c b/kernel/rcupdate.c index d00eded75d71..ad497722f04f 100644 --- a/kernel/rcupdate.c +++ b/kernel/rcupdate.c @@ -465,6 +465,6 @@ void synchronize_kernel(void) } module_param(maxbatch, int, 0); -EXPORT_SYMBOL_GPL(call_rcu); -EXPORT_SYMBOL_GPL(call_rcu_bh); -EXPORT_SYMBOL_GPL(synchronize_kernel); +EXPORT_SYMBOL(call_rcu); /* WARNING: GPL-only in April 2006. */ +EXPORT_SYMBOL(call_rcu_bh); /* WARNING: GPL-only in April 2006. */ +EXPORT_SYMBOL(synchronize_kernel); /* WARNING: GPL-only in April 2006. */