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| author |   Pranith Kumar <bobby.prani@gmail.com> | 2014-12-05 11:24:45 -0500 |
|---|---|---|
| committer |   Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2015-01-06 11:04:29 -0800 |
| commit | 83fe27ea531161a655f02dc7732d14cfaa27fd5d (patch) | |
| tree | 1f81714c3b10b76f483eea380b0eafe7cf84e75b /drivers/devfreq | |
| parent | rcu: Combine DEFINE_SRCU() and DEFINE_STATIC_SRCU() (diff) | |
| download | linux-dev-83fe27ea531161a655f02dc7732d14cfaa27fd5d.tar.xz linux-dev-83fe27ea531161a655f02dc7732d14cfaa27fd5d.zip | |
rcu: Make SRCU optional by using CONFIG_SRCU
SRCU is not necessary to be compiled by default in all cases. For tinification
efforts not compiling SRCU unless necessary is desirable.
The current patch tries to make compiling SRCU optional by introducing a new
Kconfig option CONFIG_SRCU which is selected when any of the components making
use of SRCU are selected.
If we do not select CONFIG_SRCU, srcu.o will not be compiled at all.
text data bss dec hex filename
2007 0 0 2007 7d7 kernel/rcu/srcu.o
Size of arch/powerpc/boot/zImage changes from
text data bss dec hex filename
831552 64180 23944 919676 e087c arch/powerpc/boot/zImage : before
829504 64180 23952 917636 e0084 arch/powerpc/boot/zImage : after
so the savings are about ~2000 bytes.
Signed-off-by: Pranith Kumar <bobby.prani@gmail.com>
CC: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
CC: Josh Triplett <josh@joshtriplett.org>
CC: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
[ paulmck: resolve conflict due to removal of arch/ia64/kvm/Kconfig. ]
Diffstat (limited to 'drivers/devfreq')
| -rw-r--r-- | drivers/devfreq/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/devfreq/Kconfig b/drivers/devfreq/Kconfig index faf4e70c42e0..3891f6781298 100644 --- a/drivers/devfreq/Kconfig +++ b/drivers/devfreq/Kconfig @@ -1,5 +1,6 @@ menuconfig PM_DEVFREQ bool "Generic Dynamic Voltage and Frequency Scaling (DVFS) support" + select SRCU help A device may have a list of frequencies and voltages available. devfreq, a generic DVFS framework can be registered for a device |