From: "Paul E. McKenney" Remove synchronize_kernel() (deprecated 2-APR-2005 in http://lkml.org/lkml/2005/4/3/11) and makes the RCU API inaccessible to non-GPL Linux kernel modules (as was announced more than one year ago in http://lkml.org/lkml/2005/4/3/8). Tested on x86 and ppc64. Signed-off-by: "Paul E. McKenney" Signed-off-by: Andrew Morton --- Documentation/RCU/whatisRCU.txt | 1 - Documentation/feature-removal-schedule.txt | 15 --------------- include/linux/rcupdate.h | 3 +-- kernel/rcupdate.c | 13 ++----------- 4 files changed, 3 insertions(+), 29 deletions(-) diff -puN Documentation/feature-removal-schedule.txt~make-rcu-api-inaccessible-to-non-gpl-linux-kernel-modules Documentation/feature-removal-schedule.txt --- devel/Documentation/feature-removal-schedule.txt~make-rcu-api-inaccessible-to-non-gpl-linux-kernel-modules 2006-05-19 16:00:46.000000000 -0700 +++ devel-akpm/Documentation/feature-removal-schedule.txt 2006-05-19 16:00:46.000000000 -0700 @@ -33,21 +33,6 @@ Who: Adrian Bunk --------------------------- -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 - ---------------------------- - What: raw1394: requests of type RAW1394_REQ_ISO_SEND, RAW1394_REQ_ISO_LISTEN When: November 2005 Why: Deprecated in favour of the new ioctl-based rawiso interface, which is diff -puN Documentation/RCU/whatisRCU.txt~make-rcu-api-inaccessible-to-non-gpl-linux-kernel-modules Documentation/RCU/whatisRCU.txt --- devel/Documentation/RCU/whatisRCU.txt~make-rcu-api-inaccessible-to-non-gpl-linux-kernel-modules 2006-05-19 16:00:46.000000000 -0700 +++ devel-akpm/Documentation/RCU/whatisRCU.txt 2006-05-19 16:00:46.000000000 -0700 @@ -790,7 +790,6 @@ RCU pointer update: RCU grace period: - synchronize_kernel (deprecated) synchronize_net synchronize_sched synchronize_rcu diff -puN include/linux/rcupdate.h~make-rcu-api-inaccessible-to-non-gpl-linux-kernel-modules include/linux/rcupdate.h --- devel/include/linux/rcupdate.h~make-rcu-api-inaccessible-to-non-gpl-linux-kernel-modules 2006-05-19 16:00:46.000000000 -0700 +++ devel-akpm/include/linux/rcupdate.h 2006-05-19 16:00:46.000000000 -0700 @@ -246,7 +246,7 @@ extern int rcu_needs_cpu(int cpu); * softirq handlers will have completed, since in some kernels, these * handlers can run in process context, and can block. * - * This primitive provides the guarantees made by the (deprecated) + * This primitive provides the guarantees made by the (now removed) * synchronize_kernel() API. In contrast, synchronize_rcu() only * guarantees that rcu_read_lock() sections will have completed. * In "classic RCU", these two guarantees happen to be one and @@ -264,7 +264,6 @@ extern void FASTCALL(call_rcu(struct rcu void (*func)(struct rcu_head *head))); extern void FASTCALL(call_rcu_bh(struct rcu_head *head, void (*func)(struct rcu_head *head))); -extern __deprecated_for_modules void synchronize_kernel(void); extern void synchronize_rcu(void); void synchronize_idle(void); extern void rcu_barrier(void); diff -puN kernel/rcupdate.c~make-rcu-api-inaccessible-to-non-gpl-linux-kernel-modules kernel/rcupdate.c --- devel/kernel/rcupdate.c~make-rcu-api-inaccessible-to-non-gpl-linux-kernel-modules 2006-05-19 16:00:46.000000000 -0700 +++ devel-akpm/kernel/rcupdate.c 2006-05-19 16:00:46.000000000 -0700 @@ -612,14 +612,6 @@ void synchronize_rcu(void) wait_for_completion(&rcu.completion); } -/* - * Deprecated, use synchronize_rcu() or synchronize_sched() instead. - */ -void synchronize_kernel(void) -{ - synchronize_rcu(); -} - module_param(blimit, int, 0); module_param(qhimark, int, 0); module_param(qlowmark, int, 0); @@ -627,7 +619,6 @@ module_param(qlowmark, int, 0); module_param(rsinterval, int, 0); #endif EXPORT_SYMBOL_GPL(rcu_batches_completed); -EXPORT_SYMBOL_GPL_FUTURE(call_rcu); /* WARNING: GPL-only in April 2006. */ -EXPORT_SYMBOL_GPL_FUTURE(call_rcu_bh); /* WARNING: GPL-only in April 2006. */ +EXPORT_SYMBOL_GPL(call_rcu); +EXPORT_SYMBOL_GPL(call_rcu_bh); EXPORT_SYMBOL_GPL(synchronize_rcu); -EXPORT_SYMBOL_GPL_FUTURE(synchronize_kernel); /* WARNING: GPL-only in April 2006. */ _