Messages in this thread | | | Date | Wed, 12 Mar 2008 08:21:41 +0100 | From | Laurent Riffard <> | Subject | Re: 2.6.25-rc5-mm1: NO_HZ=Y && PREEMPT_RCU=Y fails to build |
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Le 11.03.2008 09:14, Andrew Morton a écrit : > ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.25-rc5/2.6.25-rc5-mm1/ >
The kernel won't build if CONFIG_NO_HZ=y and CONFIG_PREEMPT_RCU=y:
$ grep -e PREEMPT -e HZ .config CONFIG_NO_HZ=y # CONFIG_PREEMPT_NONE is not set # CONFIG_PREEMPT_VOLUNTARY is not set CONFIG_PREEMPT=y CONFIG_PREEMPT_RCU=y # CONFIG_HZ_100 is not set CONFIG_HZ_250=y # CONFIG_HZ_300 is not set # CONFIG_HZ_1000 is not set CONFIG_HZ=250 CONFIG_DEBUG_PREEMPT=y $ $ make ... CC init/main.o In file included from include/linux/rcupdate.h:60, from include/linux/rculist.h:11, from include/linux/dcache.h:9, from include/linux/fs.h:279, from include/linux/proc_fs.h:6, from init/main.c:15: include/linux/rcupreempt.h: In function 'rcu_enter_nohz': include/linux/rcupreempt.h:91: error: 'HZ' undeclared (first use in this function) include/linux/rcupreempt.h:91: error: (Each undeclared identifier is reported only once include/linux/rcupreempt.h:91: error: for each function it appears in.) include/linux/rcupreempt.h: In function 'rcu_exit_nohz': include/linux/rcupreempt.h:99: error: 'HZ' undeclared (first use in this function) make[1]: *** [init/main.o] Error 1 make: *** [init] Error 2 $
At first glance, I would suspect these patches: add-warn_on_secs-macro.patch use-warn_on_secs-in-rcupreempth.patch
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