devfreq: Fix build break of devfreq-event class
This patch fixes the build break of the exynos-ppmu driver because Makefile in drivers/devfreq don't include the entry of devfreq-event.c driver. The original patch[1] includes the entry to build devfreq-event.c without the build break. This build break is generated in the process of merging the patch. [1] https://lkml.org/lkml/2015/1/25/579 - [PATCH v10 1/7] devfreq: event: Add new devfreq_event class to provide basic data for devfreq governor CC init/version.o LD init/built-in.o drivers/built-in.o: In function `exynos_ppmu_probe': binder.c:(.text+0x4447ec): undefined reference to `devm_devfreq_event_add_edev' make: *** [vmlinux] Error 1 Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Cc: MyungJoo Ham <myungjoo.ham@samsung.com> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
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