diff options
| -rw-r--r-- | Documentation/ABI/testing/sysfs-kernel-address_bits | 10 | ||||
| -rw-r--r-- | kernel/ksysfs.c | 9 |
2 files changed, 19 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-kernel-address_bits b/Documentation/ABI/testing/sysfs-kernel-address_bits new file mode 100644 index 000000000000..5d09ff84d4d6 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-kernel-address_bits @@ -0,0 +1,10 @@ +What: /sys/kernel/address_bit +Date: May 2023 +KernelVersion: 6.3 +Contact: Thomas Weißschuh <linux@weissschuh.net> +Description: + The address size of the running kernel in bits. + + Access: Read + +Users: util-linux diff --git a/kernel/ksysfs.c b/kernel/ksysfs.c index 2df00b789b90..0408aab80941 100644 --- a/kernel/ksysfs.c +++ b/kernel/ksysfs.c @@ -51,6 +51,14 @@ static ssize_t cpu_byteorder_show(struct kobject *kobj, } KERNEL_ATTR_RO(cpu_byteorder); +/* address bits */ +static ssize_t address_bits_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + return sysfs_emit(buf, "%zu\n", sizeof(void *) * 8 /* CHAR_BIT */); +} +KERNEL_ATTR_RO(address_bits); + #ifdef CONFIG_UEVENT_HELPER /* uevent helper program, used during early boot */ static ssize_t uevent_helper_show(struct kobject *kobj, @@ -233,6 +241,7 @@ static struct attribute * kernel_attrs[] = { &fscaps_attr.attr, &uevent_seqnum_attr.attr, &cpu_byteorder_attr.attr, + &address_bits_attr.attr, #ifdef CONFIG_UEVENT_HELPER &uevent_helper_attr.attr, #endif |