cpufreq / governor: Fix problem with cpufreq_ondemand or cpufreq_conservative

Since commit 2aacdff entitled "cpufreq: Move common part from governors
to separate file", whenever the drivers that depend on this new file
(cpufreq_ondemand or cpufreq_conservative) are built as modules, a new
module named cpufreq_governor is created because the Makefile includes
cpufreq_governor.o twice. As drivers/cpufreq/cpufreq_governor.c contains no
MODULE directives, the resulting module has no license specified, which
results in logging of a "module license 'unspecified' taints kernel". In
addition, a number of globals are exported GPL only, and are therefore
not available. This fix establishes a new boolean configuration variable
that forces cpufreq_governor.o to be linked into the kernel whenever
either cpufreq_ondemand or cpufreq_conservative is selected.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/cpufreq/Kconfig b/drivers/cpufreq/Kconfig
index ea512f47b789b49c842a78388f15957fb65d62be..e0a899f25e37445491574f34e8350032d6d228ae 100644 (file)
--- a/drivers/cpufreq/Kconfig
+++ b/drivers/cpufreq/Kconfig
@@ -20,6 +20,9 @@ if CPU_FREQ
 config CPU_FREQ_TABLE
        tristate
 
+config CPU_FREQ_GOV_COMMON
+       bool
+
 config CPU_FREQ_STAT
        tristate "CPU frequency translation statistics"
        select CPU_FREQ_TABLE
@@ -141,6 +144,7 @@ config CPU_FREQ_GOV_USERSPACE
 config CPU_FREQ_GOV_ONDEMAND
        tristate "'ondemand' cpufreq policy governor"
        select CPU_FREQ_TABLE
+       select CPU_FREQ_GOV_COMMON
        help
          'ondemand' - This driver adds a dynamic cpufreq policy governor.
          The governor does a periodic polling and 
@@ -159,6 +163,7 @@ config CPU_FREQ_GOV_ONDEMAND
 config CPU_FREQ_GOV_CONSERVATIVE
        tristate "'conservative' cpufreq governor"
        depends on CPU_FREQ
+       select CPU_FREQ_GOV_COMMON
        help
          'conservative' - this driver is rather similar to the 'ondemand'
          governor both in its source code and its purpose, the difference is

diff --git a/drivers/cpufreq/Makefile b/drivers/cpufreq/Makefile
index 1f254ec087c1c398d3da2035d477e37d8523b969..fadc4d496e2fc55383c2f9ddf6c59b9ff2072ec3 100644 (file)
--- a/drivers/cpufreq/Makefile
+++ b/drivers/cpufreq/Makefile
@@ -7,8 +7,9 @@ obj-$(CONFIG_CPU_FREQ_STAT)             += cpufreq_stats.o
 obj-$(CONFIG_CPU_FREQ_GOV_PERFORMANCE) += cpufreq_performance.o
 obj-$(CONFIG_CPU_FREQ_GOV_POWERSAVE)   += cpufreq_powersave.o
 obj-$(CONFIG_CPU_FREQ_GOV_USERSPACE)   += cpufreq_userspace.o
-obj-$(CONFIG_CPU_FREQ_GOV_ONDEMAND)    += cpufreq_ondemand.o cpufreq_governor.o
-obj-$(CONFIG_CPU_FREQ_GOV_CONSERVATIVE)        += cpufreq_conservative.o cpufreq_governor.o
+obj-$(CONFIG_CPU_FREQ_GOV_ONDEMAND)    += cpufreq_ondemand.o
+obj-$(CONFIG_CPU_FREQ_GOV_CONSERVATIVE)        += cpufreq_conservative.o
+obj-$(CONFIG_CPU_FREQ_GOV_COMMON)              += cpufreq_governor.o
 
 # CPUfreq cross-arch helpers
 obj-$(CONFIG_CPU_FREQ_TABLE)           += freq_table.o