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author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2008-03-10 11:43:57 -0700 |
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committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-03-10 18:01:20 -0700 |
commit | 21bbb39c376ce6beeeb549d155f0d53dc76ed000 (patch) | |
tree | 762d0ae6d1cd88aaa231739c3e88437e52ffa387 /mm | |
parent | f47831fabaf0206abc56ee5a33fd006fe29b6dc6 (diff) | |
download | kernel_samsung_smdk4412-21bbb39c376ce6beeeb549d155f0d53dc76ed000.zip kernel_samsung_smdk4412-21bbb39c376ce6beeeb549d155f0d53dc76ed000.tar.gz kernel_samsung_smdk4412-21bbb39c376ce6beeeb549d155f0d53dc76ed000.tar.bz2 |
rcu: move PREEMPT_RCU config option back under PREEMPT
The original preemptible-RCU patch put the choice between classic and
preemptible RCU into kernel/Kconfig.preempt, which resulted in build failures
on machines not supporting CONFIG_PREEMPT. This choice was therefore moved to
init/Kconfig, which worked, but placed the choice between classic and
preemptible RCU at the top level, a very obtuse choice indeed.
This patch changes from the Kconfig "choice" mechanism to a pair of booleans,
only one of which (CONFIG_PREEMPT_RCU) is user-visible, and is located in
kernel/Kconfig.preempt, where one would expect it to be. The other
(CONFIG_CLASSIC_RCU) is in init/Kconfig so that it is available to all
architectures, hopefully avoiding build breakage. Thanks to Roman Zippel for
suggesting this approach.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Dipankar Sarma <dipankar@in.ibm.com>
Cc: Josh Triplett <josh@freedesktop.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Roman Zippel <zippel@linux-m68k.org>
Cc: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
0 files changed, 0 insertions, 0 deletions