linux-kernel - [PATCH -next] cpufreq: provide cpufreq

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Message-Id: <20091006110211.139b91e5.randy.dunlap@oracle.com>
Date:	Tue, 6 Oct 2009 11:02:11 -0700
From:	Randy Dunlap <randy.dunlap@...cle.com>
To:	Stephen Rothwell <sfr@...b.auug.org.au>,
	Dave Jones <davej@...hat.com>, Avi Kivity <avi@...hat.com>
Cc:	linux-next@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
	cpufreq@...r.kernel.org
Subject: [PATCH -next] cpufreq: provide cpufreq_get stub

From: Randy Dunlap <randy.dunlap@...cle.com>

When CONFIG_CPU_FREQ is disabled, cpufreq_get() needs a stub.
Used by kvm (although it looks like a bit of the kvm code could
be omitted when CONFIG_CPU_FREQ is disabled).

arch/x86/built-in.o: In function `kvm_arch_init':
(.text+0x10de7): undefined reference to `cpufreq_get'
 
Signed-off-by: Randy Dunlap <randy.dunlap@...cle.com>
---
 include/linux/cpufreq.h |    7 +++++++
 1 file changed, 7 insertions(+)

--- linux-next-20091006.orig/include/linux/cpufreq.h
+++ linux-next-20091006/include/linux/cpufreq.h
@@ -291,8 +291,15 @@ struct global_attr {
 int cpufreq_get_policy(struct cpufreq_policy *policy, unsigned int cpu);
 int cpufreq_update_policy(unsigned int cpu);
 
+#ifdef CONFIG_CPU_FREQ
 /* query the current CPU frequency (in kHz). If zero, cpufreq couldn't detect it */
 unsigned int cpufreq_get(unsigned int cpu);
+#else
+static inline unsigned int cpufreq_get(unsigned int cpu)
+{
+	return 0;
+}
+#endif
 
 /* query the last known CPU freq (in kHz). If zero, cpufreq couldn't detect it */
 #ifdef CONFIG_CPU_FREQ
---
~Randy
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