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Date:	Thu, 23 Aug 2012 13:01:43 +1000
From:	Stephen Rothwell <>
To:	"Paul E. McKenney" <>
	Frederic Weisbecker <>,
	Thomas Gleixner <>,
	Ingo Molnar <>, "H. Peter Anvin" <>,
	Peter Zijlstra <>
Subject: linux-next: manual merge of the rcu tree with the tip tree

Hi Paul,

Today's linux-next merge of the rcu tree got a conflict in arch/Kconfig
between commit b952741c8079 ("cputime: Generalize
CONFIG_VIRT_CPU_ACCOUNTING") from the tip tree and commit 3dbdfc26e27f
("rcu: Settle config for userspace extended quiescent state") from the
rcu tree.

Just context changes.  I fixed it up (see below) and can carry the fix as
Stephen Rothwell          

diff --cc arch/Kconfig
index 07db929,1c7c9be..0000000
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@@ -294,26 -274,14 +294,36 @@@ config SECCOMP_FILTE
  	  See Documentation/prctl/seccomp_filter.txt for details.
 +	bool
 +	help
 +	  The arch uses struct mod_arch_specific to store data.  Many arches
 +	  just need a simple module loader without arch specific data - those
 +	  should not enable this.
 +	bool
 +	help
 +	  Modules only use ELF RELA relocations.  Modules with ELF REL
 +	  relocations will give an error.
 +	bool
 +	help
 +	  Modules only use ELF REL relocations.  Modules with ELF RELA
 +	  relocations will give an error.
 +	bool
+ 	bool
+ 	help
+ 	  Provide kernel entry/exit hooks necessary for userspace
+ 	  RCU extended quiescent state. Syscalls need to be wrapped inside
+ 	  rcu_user_exit()-rcu_user_enter() through the slow path using
+ 	  TIF_NOHZ flag. Exceptions handlers must be wrapped as well. Irqs
+ 	  are already protected inside rcu_irq_enter/rcu_irq_exit() but
+ 	  preemption or signal handling on irq exit still need to be protected.
  source "kernel/gcov/Kconfig"

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