bpf: fix typos

src/lxc/cgroups/cgfsng.c

@@ -3096,9 +3096,9 @@ static int bpf_device_cgroup_prepare(struct cgroup_ops *ops,
 		return log_error_errno(-1, EINVAL, "Failed to parse device string %s=%s", key, val);
 
 	/*
-	 * Note that bpf_list_add_device() indicates whether or not it had to
-	 * alter the current device list by return 1 and 0; both indicate
-	 * success. A negative return value indicates and error.
+	 * Note that bpf_list_add_device() returns 1 if it altered the device
+	 * list and 0 if it didn't; both return values indicate success.
+	 * Only a negative return value indicates an error.
 	 */
 	ret = bpf_list_add_device(&conf->bpf_devices, &device_item);
 	if (ret < 0)

src/lxc/cgroups/cgroup2_devices.c

@@ -653,9 +653,9 @@ bool bpf_cgroup_devices_update(struct cgroup_ops *ops,
 		return ret_set_errno(false, EBADF);
 
 	/*
-	 * Note that bpf_list_add_device() indicates whether or not it had to
-	 * alter the current device list by return 1 and 0; both indicate
-	 * success. A negative return value indicates and error.
+	 * Note that bpf_list_add_device() returns 1 if it altered the device
+	 * list and 0 if it didn't; both return values indicate success.
+	 * Only a negative return value indicates an error.
 	 */
 	ret = bpf_list_add_device(bpf_devices, new);
 	if (ret < 0)

src/lxc/cgroups/cgroup2_devices.h

@@ -63,9 +63,9 @@ __hidden extern void bpf_device_program_free(struct cgroup_ops *ops);
 __hidden extern bool bpf_devices_cgroup_supported(void);
 
 /*
- * Note that bpf_list_add_device() indicates whether or not it had to alter the
- * current device list by return 1 and 0; both indicate success. A negative
- * return value indicates and error.
+ * Note that bpf_list_add_device() returns 1 if it altered the device list and
+ * 0 if it didn't; both return values indicate success. Only a negative return
+ * value indicates an error.
  */
 __hidden extern int bpf_list_add_device(struct bpf_devices *bpf_devices,
 					struct device_item *device);