diff --git a/libc/kernel/uapi/linux/ndctl.h b/libc/kernel/uapi/linux/ndctl.h
index 44c9ee0..bee0b1c 100644
--- a/libc/kernel/uapi/linux/ndctl.h
+++ b/libc/kernel/uapi/linux/ndctl.h
@@ -19,49 +19,6 @@
 #ifndef __NDCTL_H__
 #define __NDCTL_H__
 #include <linux/types.h>
-struct nd_cmd_smart {
-  __u32 status;
-  __u8 data[128];
-} __packed;
-#define ND_SMART_HEALTH_VALID (1 << 0)
-#define ND_SMART_SPARES_VALID (1 << 1)
-#define ND_SMART_USED_VALID (1 << 2)
-#define ND_SMART_TEMP_VALID (1 << 3)
-#define ND_SMART_CTEMP_VALID (1 << 4)
-#define ND_SMART_ALARM_VALID (1 << 9)
-#define ND_SMART_SHUTDOWN_VALID (1 << 10)
-#define ND_SMART_VENDOR_VALID (1 << 11)
-#define ND_SMART_SPARE_TRIP (1 << 0)
-#define ND_SMART_TEMP_TRIP (1 << 1)
-#define ND_SMART_CTEMP_TRIP (1 << 2)
-#define ND_SMART_NON_CRITICAL_HEALTH (1 << 0)
-#define ND_SMART_CRITICAL_HEALTH (1 << 1)
-#define ND_SMART_FATAL_HEALTH (1 << 2)
-struct nd_smart_payload {
-  __u32 flags;
-  __u8 reserved0[4];
-  __u8 health;
-  __u8 spares;
-  __u8 life_used;
-  __u8 alarm_flags;
-  __u16 temperature;
-  __u16 ctrl_temperature;
-  __u8 reserved1[15];
-  __u8 shutdown_state;
-  __u32 vendor_size;
-  __u8 vendor_data[92];
-} __packed;
-struct nd_cmd_smart_threshold {
-  __u32 status;
-  __u8 data[8];
-} __packed;
-struct nd_smart_threshold_payload {
-  __u8 alarm_control;
-  __u8 reserved0;
-  __u16 temperature;
-  __u8 spares;
-  __u8 reserved[3];
-} __packed;
 struct nd_cmd_dimm_flags {
   __u32 status;
   __u32 flags;
@@ -158,8 +115,6 @@
   ND_CONFIG_LOCKED = 1,
 };
 #define ND_IOCTL 'N'
-#define ND_IOCTL_SMART _IOWR(ND_IOCTL, ND_CMD_SMART, struct nd_cmd_smart)
-#define ND_IOCTL_SMART_THRESHOLD _IOWR(ND_IOCTL, ND_CMD_SMART_THRESHOLD, struct nd_cmd_smart_threshold)
 #define ND_IOCTL_DIMM_FLAGS _IOWR(ND_IOCTL, ND_CMD_DIMM_FLAGS, struct nd_cmd_dimm_flags)
 #define ND_IOCTL_GET_CONFIG_SIZE _IOWR(ND_IOCTL, ND_CMD_GET_CONFIG_SIZE, struct nd_cmd_get_config_size)
 #define ND_IOCTL_GET_CONFIG_DATA _IOWR(ND_IOCTL, ND_CMD_GET_CONFIG_DATA, struct nd_cmd_get_config_data_hdr)
@@ -186,7 +141,7 @@
   ND_DRIVER_DAX_PMEM = 1 << ND_DEVICE_DAX_PMEM,
 };
 enum {
-  ND_MIN_NAMESPACE_SIZE = 0x00400000,
+  ND_MIN_NAMESPACE_SIZE = PAGE_SIZE,
 };
 enum ars_masks {
   ARS_STATUS_MASK = 0x0000FFFF,