diff options
Diffstat (limited to 'kernel/ksysfs.c')
| -rw-r--r-- | kernel/ksysfs.c | 33 |
1 files changed, 27 insertions, 6 deletions
diff --git a/kernel/ksysfs.c b/kernel/ksysfs.c index 4e316e1acf5..6683ccef9ff 100644 --- a/kernel/ksysfs.c +++ b/kernel/ksysfs.c @@ -18,6 +18,9 @@ #include <linux/stat.h> #include <linux/sched.h> #include <linux/capability.h> +#include <linux/compiler.h> + +#include <linux/rcupdate.h> /* rcu_expedited */ #define KERNEL_ATTR_RO(_name) \ static struct kobj_attribute _name##_attr = __ATTR_RO(_name) @@ -26,7 +29,6 @@ static struct kobj_attribute _name##_attr = __ATTR_RO(_name) static struct kobj_attribute _name##_attr = \ __ATTR(_name, 0644, _name##_show, _name##_store) -#if defined(CONFIG_HOTPLUG) /* current uevent sequence number */ static ssize_t uevent_seqnum_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf) @@ -35,6 +37,7 @@ static ssize_t uevent_seqnum_show(struct kobject *kobj, } KERNEL_ATTR_RO(uevent_seqnum); +#ifdef CONFIG_UEVENT_HELPER /* uevent helper program, used during early boot */ static ssize_t uevent_helper_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf) @@ -114,7 +117,7 @@ static ssize_t kexec_crash_size_store(struct kobject *kobj, unsigned long cnt; int ret; - if (strict_strtoul(buf, 0, &cnt)) + if (kstrtoul(buf, 0, &cnt)) return -EINVAL; ret = crash_shrink_memory(cnt); @@ -127,7 +130,7 @@ static ssize_t vmcoreinfo_show(struct kobject *kobj, { return sprintf(buf, "%lx %x\n", paddr_vmcoreinfo_note(), - (unsigned int)vmcoreinfo_max_size); + (unsigned int)sizeof(vmcoreinfo_note)); } KERNEL_ATTR_RO(vmcoreinfo); @@ -141,11 +144,28 @@ static ssize_t fscaps_show(struct kobject *kobj, } KERNEL_ATTR_RO(fscaps); +int rcu_expedited; +static ssize_t rcu_expedited_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + return sprintf(buf, "%d\n", rcu_expedited); +} +static ssize_t rcu_expedited_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t count) +{ + if (kstrtoint(buf, 0, &rcu_expedited)) + return -EINVAL; + + return count; +} +KERNEL_ATTR_RW(rcu_expedited); + /* * Make /sys/kernel/notes give the raw contents of our kernel .notes section. */ -extern const void __start_notes __attribute__((weak)); -extern const void __stop_notes __attribute__((weak)); +extern const void __start_notes __weak; +extern const void __stop_notes __weak; #define notes_size (&__stop_notes - &__start_notes) static ssize_t notes_read(struct file *filp, struct kobject *kobj, @@ -169,8 +189,8 @@ EXPORT_SYMBOL_GPL(kernel_kobj); static struct attribute * kernel_attrs[] = { &fscaps_attr.attr, -#if defined(CONFIG_HOTPLUG) &uevent_seqnum_attr.attr, +#ifdef CONFIG_UEVENT_HELPER &uevent_helper_attr.attr, #endif #ifdef CONFIG_PROFILING @@ -182,6 +202,7 @@ static struct attribute * kernel_attrs[] = { &kexec_crash_size_attr.attr, &vmcoreinfo_attr.attr, #endif + &rcu_expedited_attr.attr, NULL }; |