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authorPranith Kumar <bobby.prani@gmail.com>2014-12-05 11:24:45 -0500
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2015-01-06 11:04:29 -0800
commit83fe27ea531161a655f02dc7732d14cfaa27fd5d (patch)
tree1f81714c3b10b76f483eea380b0eafe7cf84e75b /fs
parent9735af5c78599703be633c057af3faee26482028 (diff)
downloadop-kernel-dev-83fe27ea531161a655f02dc7732d14cfaa27fd5d.zip
op-kernel-dev-83fe27ea531161a655f02dc7732d14cfaa27fd5d.tar.gz
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 'fs')
-rw-r--r--fs/btrfs/Kconfig1
-rw-r--r--fs/notify/Kconfig1
-rw-r--r--fs/quota/Kconfig1
3 files changed, 3 insertions, 0 deletions
diff --git a/fs/btrfs/Kconfig b/fs/btrfs/Kconfig
index a66768e..80e9c18 100644
--- a/fs/btrfs/Kconfig
+++ b/fs/btrfs/Kconfig
@@ -8,6 +8,7 @@ config BTRFS_FS
select LZO_DECOMPRESS
select RAID6_PQ
select XOR_BLOCKS
+ select SRCU
help
Btrfs is a general purpose copy-on-write filesystem with extents,
diff --git a/fs/notify/Kconfig b/fs/notify/Kconfig
index 22c629e..2a24249 100644
--- a/fs/notify/Kconfig
+++ b/fs/notify/Kconfig
@@ -1,5 +1,6 @@
config FSNOTIFY
def_bool n
+ select SRCU
source "fs/notify/dnotify/Kconfig"
source "fs/notify/inotify/Kconfig"
diff --git a/fs/quota/Kconfig b/fs/quota/Kconfig
index c51df1d..4a09975 100644
--- a/fs/quota/Kconfig
+++ b/fs/quota/Kconfig
@@ -5,6 +5,7 @@
config QUOTA
bool "Quota support"
select QUOTACTL
+ select SRCU
help
If you say Y here, you will be able to set per user limits for disk
usage (also called disk quotas). Currently, it works for the
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