[PATCH 1/5] LSM: Auto-undef LSM_HOOK macro.

[Tetsuo Handa]

Since all users are doing "#undef LSM_HOOK" immediately after
"#include <linux/lsm_hook_defs.h>" line, let lsm_hook_defs.h do it.

Signed-off-by: Tetsuo Handa <penguin-kernel at I-love.SAKURA.ne.jp>
---
 include/linux/bpf_lsm.h       | 1 -
 include/linux/lsm_hook_defs.h | 3 ++-
 include/linux/lsm_hooks.h     | 2 --
 kernel/bpf/bpf_lsm.c          | 3 ---
 security/bpf/hooks.c          | 1 -
 security/security.c           | 4 ----
 6 files changed, 2 insertions(+), 12 deletions(-)

diff --git a/include/linux/bpf_lsm.h b/include/linux/bpf_lsm.h
index 5bbc31ac948c..11544b098c06 100644
--- a/include/linux/bpf_lsm.h
+++ b/include/linux/bpf_lsm.h
@@ -16,7 +16,6 @@
 #define LSM_HOOK(RET, DEFAULT, NAME, ...) \
 	RET bpf_lsm_##NAME(__VA_ARGS__);
 #include <linux/lsm_hook_defs.h>
-#undef LSM_HOOK
 
 struct bpf_storage_blob {
 	struct bpf_local_storage __rcu *storage;
diff --git a/include/linux/lsm_hook_defs.h b/include/linux/lsm_hook_defs.h
index 6ea529e4d9be..4229dee73eba 100644
--- a/include/linux/lsm_hook_defs.h
+++ b/include/linux/lsm_hook_defs.h
@@ -23,7 +23,6 @@
  * struct security_hook_heads {
  *   #define LSM_HOOK(RET, DEFAULT, NAME, ...) struct hlist_head NAME;
  *   #include <linux/lsm_hook_defs.h>
- *   #undef LSM_HOOK
  * };
  */
 LSM_HOOK(int, 0, binder_set_context_mgr, const struct cred *mgr)
@@ -423,3 +422,5 @@ LSM_HOOK(int, 0, uring_override_creds, const struct cred *new)
 LSM_HOOK(int, 0, uring_sqpoll, void)
 LSM_HOOK(int, 0, uring_cmd, struct io_uring_cmd *ioucmd)
 #endif /* CONFIG_IO_URING */
+
+#undef LSM_HOOK
diff --git a/include/linux/lsm_hooks.h b/include/linux/lsm_hooks.h
index b646f6746147..135b3f58f8d2 100644
--- a/include/linux/lsm_hooks.h
+++ b/include/linux/lsm_hooks.h
@@ -57,7 +57,6 @@ do {						\
 union security_list_options {
 	#define LSM_HOOK(RET, DEFAULT, NAME, ...) RET (*NAME)(__VA_ARGS__);
 	#include "lsm_hook_defs.h"
-	#undef LSM_HOOK
 	void *lsm_callback;
 };
 
@@ -87,7 +86,6 @@ struct lsm_static_calls_table {
 	#define LSM_HOOK(RET, DEFAULT, NAME, ...) \
 		struct lsm_static_call NAME[MAX_LSM_COUNT];
 	#include <linux/lsm_hook_defs.h>
-	#undef LSM_HOOK
 } __randomize_layout;
 
 /**
diff --git a/kernel/bpf/bpf_lsm.c b/kernel/bpf/bpf_lsm.c
index e14c822f8911..025d05c30f11 100644
--- a/kernel/bpf/bpf_lsm.c
+++ b/kernel/bpf/bpf_lsm.c
@@ -26,14 +26,11 @@ noinline RET bpf_lsm_##NAME(__VA_ARGS__)	\
 {						\
 	return DEFAULT;				\
 }
-
 #include <linux/lsm_hook_defs.h>
-#undef LSM_HOOK
 
 #define LSM_HOOK(RET, DEFAULT, NAME, ...) BTF_ID(func, bpf_lsm_##NAME)
 BTF_SET_START(bpf_lsm_hooks)
 #include <linux/lsm_hook_defs.h>
-#undef LSM_HOOK
 BTF_SET_END(bpf_lsm_hooks)
 
 /* List of LSM hooks that should operate on 'current' cgroup regardless
diff --git a/security/bpf/hooks.c b/security/bpf/hooks.c
index 61433633d235..294d9d152fb0 100644
--- a/security/bpf/hooks.c
+++ b/security/bpf/hooks.c
@@ -11,7 +11,6 @@ static struct security_hook_list bpf_lsm_hooks[] __ro_after_init = {
 	#define LSM_HOOK(RET, DEFAULT, NAME, ...) \
 	LSM_HOOK_INIT_DISABLED(NAME, bpf_lsm_##NAME),
 	#include <linux/lsm_hook_defs.h>
-	#undef LSM_HOOK
 	LSM_HOOK_INIT(inode_free_security, bpf_inode_storage_free),
 	LSM_HOOK_INIT(task_free, bpf_task_storage_free),
 };
diff --git a/security/security.c b/security/security.c
index 5f4e5e6d0989..986aa5e6e29d 100644
--- a/security/security.c
+++ b/security/security.c
@@ -131,7 +131,6 @@ static __initdata struct lsm_info *exclusive;
 #define LSM_HOOK(RET, DEFAULT, NAME, ...)				\
 	LSM_DEFINE_UNROLL(DEFINE_LSM_STATIC_CALL, NAME, RET, __VA_ARGS__)
 #include <linux/lsm_hook_defs.h>
-#undef LSM_HOOK
 #undef DEFINE_LSM_STATIC_CALL
 
 /*
@@ -152,7 +151,6 @@ struct lsm_static_calls_table static_calls_table __ro_after_init = {
 		LSM_DEFINE_UNROLL(INIT_LSM_STATIC_CALL, NAME)		\
 	},
 #include <linux/lsm_hook_defs.h>
-#undef LSM_HOOK
 #undef INIT_LSM_STATIC_CALL
 };
 
@@ -894,9 +892,7 @@ int lsm_fill_user_ctx(struct lsm_ctx __user *uctx, size_t *uctx_len,
 	static const int __maybe_unused LSM_RET_DEFAULT(NAME) = (DEFAULT);
 #define LSM_HOOK(RET, DEFAULT, NAME, ...) \
 	DECLARE_LSM_RET_DEFAULT_##RET(DEFAULT, NAME)
-
 #include <linux/lsm_hook_defs.h>
-#undef LSM_HOOK
 
 /*
  * Hook list operation macros.
-- 
2.34.1