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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2015-12-07 13:09:52 -0800
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2015-12-07 16:59:37 -0800
commit79cfea0273876d9c438f3227b8f68c8c7ae31583 (patch)
treeb147a1c382fd50ac1ee5113ea851b517bf3405df /kernel/ksysfs.c
parent3e42ec1aa716f10c68294b8492ae3ea684528699 (diff)
downloadlinux-sh-79cfea0273876d9c438f3227b8f68c8c7ae31583.tar.gz
rcu: Remove TINY_RCU bloat from pointless boot parameters
The rcu_expedited, rcu_normal, and rcu_normal_after_boot kernel boot parameters are pointless in the case of TINY_RCU because in that case synchronous grace periods, both expedited and normal, are no-ops. However, these three symbols contribute several hundred bytes of bloat. This commit therefore uses CPP directives to avoid compiling this code in TINY_RCU kernels. Reported-by: kbuild test robot <fengguang.wu@intel.com> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Diffstat (limited to 'kernel/ksysfs.c')
-rw-r--r--kernel/ksysfs.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/ksysfs.c b/kernel/ksysfs.c
index b4e2fa52d8bc..152da4a48867 100644
--- a/kernel/ksysfs.c
+++ b/kernel/ksysfs.c
@@ -144,6 +144,7 @@ static ssize_t fscaps_show(struct kobject *kobj,
}
KERNEL_ATTR_RO(fscaps);
+#ifndef CONFIG_TINY_RCU
int rcu_expedited;
static ssize_t rcu_expedited_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
@@ -177,6 +178,7 @@ static ssize_t rcu_normal_store(struct kobject *kobj,
return count;
}
KERNEL_ATTR_RW(rcu_normal);
+#endif /* #ifndef CONFIG_TINY_RCU */
/*
* Make /sys/kernel/notes give the raw contents of our kernel .notes section.
@@ -219,8 +221,10 @@ static struct attribute * kernel_attrs[] = {
&kexec_crash_size_attr.attr,
&vmcoreinfo_attr.attr,
#endif
+#ifndef CONFIG_TINY_RCU
&rcu_expedited_attr.attr,
&rcu_normal_attr.attr,
+#endif
NULL
};