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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2009-07-10 14:57:56 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2009-07-10 14:24:05 -0700
commitc99e6efe1ba04561e7d93a81f0be07e37427e835 (patch)
tree8a1743463ef9676e68b9c3971f0bbeea04111bdd /include/linux/sched.h
parent2a6f86bc5ed4af2ff04bc927eb77789c70e53a1e (diff)
sched: INIT_PREEMPT_COUNT
Pull the initial preempt_count value into a single definition site. Maintainers for: alpha, ia64 and m68k, please have a look, your arch code is funny. The header magic is a bit odd, but similar to the KERNEL_DS one, CPP waits with expanding these macros until the INIT_THREAD_INFO macro itself is expanded, which is in arch/*/kernel/init_task.c where we've already included sched.h so we're good. Cc: tony.luck@intel.com Cc: rth@twiddle.net Cc: geert@linux-m68k.org Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Matt Mackall <mpm@selenic.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/sched.h')
-rw-r--r--include/linux/sched.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 0085d758d64..2a99f1c15cf 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -498,6 +498,12 @@ struct task_cputime {
.sum_exec_runtime = 0, \
}
+/*
+ * Disable preemption until the scheduler is running.
+ * Reset by start_kernel()->sched_init()->init_idle().
+ */
+#define INIT_PREEMPT_COUNT (1)
+
/**
* struct thread_group_cputimer - thread group interval timer counts
* @cputime: thread group interval timers.