[PATCH -next -v2 5/8] lockdown: drop an unused include and move lockdown_reasons

[Cai Xinchen <caixinchen1@huawei.com>]

linux/export.h is not needed since the file has no EXPORT_SYMBOL() usage.

lockdown_reasons[] is only used by the lockdown LSM after the audit data
was removed from lsm_audit.  Move it into security/lockdown/lockdown.c,
make it static, and drop the now stale extern declaration.  The existing
enum comment in include/linux/security.h already pointed at
security/lockdown/lockdown.c and becomes accurate now that the array has
moved there.

No functional change.

Signed-off-by: Cai Xinchen <caixinchen1@huawei.com>
---
 include/linux/security.h     |  2 --
 security/lockdown/lockdown.c | 40 +++++++++++++++++++++++++++++++++++-
 security/security.c          | 40 ------------------------------------
 3 files changed, 39 insertions(+), 43 deletions(-)

diff --git a/include/linux/security.h b/include/linux/security.h
index 40831fab5470..9d3a1eaa90ff 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -170,8 +170,6 @@ struct lsm_prop {
 	struct lsm_prop_bpf bpf;
 };
 
-extern const char *const lockdown_reasons[LOCKDOWN_CONFIDENTIALITY_MAX+1];
-
 /* These functions are in security/commoncap.c */
 extern int cap_capable(const struct cred *cred, struct user_namespace *ns,
 		       int cap, unsigned int opts);
diff --git a/security/lockdown/lockdown.c b/security/lockdown/lockdown.c
index 8648508d49b2..84efd533fe5a 100644
--- a/security/lockdown/lockdown.c
+++ b/security/lockdown/lockdown.c
@@ -11,10 +11,48 @@
  */
 
 #include <linux/security.h>
-#include <linux/export.h>
 #include <linux/lsm_hooks.h>
 #include <uapi/linux/lsm.h>
 
+/*
+ * These are descriptions of the reasons that can be passed to the
+ * security_locked_down() LSM hook, used for the denial message and the
+ * securityfs status file.
+ */
+static const char *const lockdown_reasons[LOCKDOWN_CONFIDENTIALITY_MAX + 1] = {
+	[LOCKDOWN_NONE] = "none",
+	[LOCKDOWN_MODULE_SIGNATURE] = "unsigned module loading",
+	[LOCKDOWN_DEV_MEM] = "/dev/mem,kmem,port",
+	[LOCKDOWN_EFI_TEST] = "/dev/efi_test access",
+	[LOCKDOWN_KEXEC] = "kexec of unsigned images",
+	[LOCKDOWN_HIBERNATION] = "hibernation",
+	[LOCKDOWN_PCI_ACCESS] = "direct PCI access",
+	[LOCKDOWN_IOPORT] = "raw io port access",
+	[LOCKDOWN_MSR] = "raw MSR access",
+	[LOCKDOWN_ACPI_TABLES] = "modifying ACPI tables",
+	[LOCKDOWN_DEVICE_TREE] = "modifying device tree contents",
+	[LOCKDOWN_PCMCIA_CIS] = "direct PCMCIA CIS storage",
+	[LOCKDOWN_TIOCSSERIAL] = "reconfiguration of serial port IO",
+	[LOCKDOWN_MODULE_PARAMETERS] = "unsafe module parameters",
+	[LOCKDOWN_MMIOTRACE] = "unsafe mmio",
+	[LOCKDOWN_DEBUGFS] = "debugfs access",
+	[LOCKDOWN_XMON_WR] = "xmon write access",
+	[LOCKDOWN_BPF_WRITE_USER] = "use of bpf to write user RAM",
+	[LOCKDOWN_DBG_WRITE_KERNEL] = "use of kgdb/kdb to write kernel RAM",
+	[LOCKDOWN_RTAS_ERROR_INJECTION] = "RTAS error injection",
+	[LOCKDOWN_XEN_USER_ACTIONS] = "Xen guest user action",
+	[LOCKDOWN_INTEGRITY_MAX] = "integrity",
+	[LOCKDOWN_KCORE] = "/proc/kcore access",
+	[LOCKDOWN_KPROBES] = "use of kprobes",
+	[LOCKDOWN_BPF_READ_KERNEL] = "use of bpf to read kernel RAM",
+	[LOCKDOWN_DBG_READ_KERNEL] = "use of kgdb/kdb to read kernel RAM",
+	[LOCKDOWN_PERF] = "unsafe use of perf",
+	[LOCKDOWN_TRACEFS] = "use of tracefs",
+	[LOCKDOWN_XMON_RW] = "xmon read and write access",
+	[LOCKDOWN_XFRM_SECRET] = "xfrm SA secret",
+	[LOCKDOWN_CONFIDENTIALITY_MAX] = "confidentiality",
+};
+
 static enum lockdown_reason kernel_locked_down;
 
 static const enum lockdown_reason lockdown_levels[] = {LOCKDOWN_NONE,
diff --git a/security/security.c b/security/security.c
index 4727b8347fc4..68cf2ab9174f 100644
--- a/security/security.c
+++ b/security/security.c
@@ -35,46 +35,6 @@
 
 #include "lsm.h"
 
-/*
- * These are descriptions of the reasons that can be passed to the
- * security_locked_down() LSM hook. Placing this array here allows
- * all security modules to use the same descriptions for auditing
- * purposes.
- */
-const char *const lockdown_reasons[LOCKDOWN_CONFIDENTIALITY_MAX + 1] = {
-	[LOCKDOWN_NONE] = "none",
-	[LOCKDOWN_MODULE_SIGNATURE] = "unsigned module loading",
-	[LOCKDOWN_DEV_MEM] = "/dev/mem,kmem,port",
-	[LOCKDOWN_EFI_TEST] = "/dev/efi_test access",
-	[LOCKDOWN_KEXEC] = "kexec of unsigned images",
-	[LOCKDOWN_HIBERNATION] = "hibernation",
-	[LOCKDOWN_PCI_ACCESS] = "direct PCI access",
-	[LOCKDOWN_IOPORT] = "raw io port access",
-	[LOCKDOWN_MSR] = "raw MSR access",
-	[LOCKDOWN_ACPI_TABLES] = "modifying ACPI tables",
-	[LOCKDOWN_DEVICE_TREE] = "modifying device tree contents",
-	[LOCKDOWN_PCMCIA_CIS] = "direct PCMCIA CIS storage",
-	[LOCKDOWN_TIOCSSERIAL] = "reconfiguration of serial port IO",
-	[LOCKDOWN_MODULE_PARAMETERS] = "unsafe module parameters",
-	[LOCKDOWN_MMIOTRACE] = "unsafe mmio",
-	[LOCKDOWN_DEBUGFS] = "debugfs access",
-	[LOCKDOWN_XMON_WR] = "xmon write access",
-	[LOCKDOWN_BPF_WRITE_USER] = "use of bpf to write user RAM",
-	[LOCKDOWN_DBG_WRITE_KERNEL] = "use of kgdb/kdb to write kernel RAM",
-	[LOCKDOWN_RTAS_ERROR_INJECTION] = "RTAS error injection",
-	[LOCKDOWN_XEN_USER_ACTIONS] = "Xen guest user action",
-	[LOCKDOWN_INTEGRITY_MAX] = "integrity",
-	[LOCKDOWN_KCORE] = "/proc/kcore access",
-	[LOCKDOWN_KPROBES] = "use of kprobes",
-	[LOCKDOWN_BPF_READ_KERNEL] = "use of bpf to read kernel RAM",
-	[LOCKDOWN_DBG_READ_KERNEL] = "use of kgdb/kdb to read kernel RAM",
-	[LOCKDOWN_PERF] = "unsafe use of perf",
-	[LOCKDOWN_TRACEFS] = "use of tracefs",
-	[LOCKDOWN_XMON_RW] = "xmon read and write access",
-	[LOCKDOWN_XFRM_SECRET] = "xfrm SA secret",
-	[LOCKDOWN_CONFIDENTIALITY_MAX] = "confidentiality",
-};
-
 bool lsm_debug __ro_after_init;
 
 unsigned int lsm_active_cnt __ro_after_init;
-- 
2.18.0.huawei.25