static_call: Pull some static_call declarations to the type headers

Some static call declarations are going to be needed on low level header
files. Move the necessary material to the dedicated static call types
header to avoid inclusion dependency hell.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lkml.kernel.org/r/20210118141223.123667-4-frederic@kernel.org

diff --git a/include/linux/static_call.h b/include/linux/static_call.h
index 695da4c9b33812e670cba9afd97474357595644d..a2c064585c033b334bceafe335a034cb47e971b1 100644 (file)
--- a/include/linux/static_call.h
+++ b/include/linux/static_call.h
@@ -107,26 +107,10 @@ extern void arch_static_call_transform(void *site, void *tramp, void *func, bool
 
 #define STATIC_CALL_TRAMP_ADDR(name) &STATIC_CALL_TRAMP(name)
 
-/*
- * __ADDRESSABLE() is used to ensure the key symbol doesn't get stripped from
- * the symbol table so that objtool can reference it when it generates the
- * .static_call_sites section.
- */
-#define __static_call(name)                                            \
-({                                                                     \
-       __ADDRESSABLE(STATIC_CALL_KEY(name));                           \
-       &STATIC_CALL_TRAMP(name);                                       \
-})
-
 #else
 #define STATIC_CALL_TRAMP_ADDR(name) NULL
 #endif
 
-
-#define DECLARE_STATIC_CALL(name, func)                                        \
-       extern struct static_call_key STATIC_CALL_KEY(name);            \
-       extern typeof(func) STATIC_CALL_TRAMP(name);
-
 #define static_call_update(name, func)                                 \
 ({                                                                     \
        BUILD_BUG_ON(!__same_type(*(func), STATIC_CALL_TRAMP(name)));   \
@@ -174,7 +158,6 @@ extern int static_call_text_reserved(void *start, void *end);
        };                                                              \
        ARCH_DEFINE_STATIC_CALL_NULL_TRAMP(name)
 
-#define static_call(name)      __static_call(name)
 #define static_call_cond(name) (void)__static_call(name)
 
 #define EXPORT_STATIC_CALL(name)                                       \
@@ -207,7 +190,6 @@ struct static_call_key {
        };                                                              \
        ARCH_DEFINE_STATIC_CALL_NULL_TRAMP(name)
 
-#define static_call(name)      __static_call(name)
 #define static_call_cond(name) (void)__static_call(name)
 
 static inline
@@ -252,9 +234,6 @@ struct static_call_key {
                .func = NULL,                                           \
        }
 
-#define static_call(name)                                              \
-       ((typeof(STATIC_CALL_TRAMP(name))*)(STATIC_CALL_KEY(name).func))
-
 static inline void __static_call_nop(void) { }
 
 /*

diff --git a/include/linux/static_call_types.h b/include/linux/static_call_types.h
index 89135bb35bf7619bd3227612e16b17d7a7a88a43..08f78b1b88b47843a4d5b2b23fc8dfeee70c2704 100644 (file)
--- a/include/linux/static_call_types.h
+++ b/include/linux/static_call_types.h
@@ -4,6 +4,7 @@
 
 #include <linux/types.h>
 #include <linux/stringify.h>
+#include <linux/compiler.h>
 
 #define STATIC_CALL_KEY_PREFIX         __SCK__
 #define STATIC_CALL_KEY_PREFIX_STR     __stringify(STATIC_CALL_KEY_PREFIX)
@@ -32,4 +33,30 @@ struct static_call_site {
        s32 key;
 };
 
+#define DECLARE_STATIC_CALL(name, func)                                        \
+       extern struct static_call_key STATIC_CALL_KEY(name);            \
+       extern typeof(func) STATIC_CALL_TRAMP(name);
+
+#ifdef CONFIG_HAVE_STATIC_CALL
+
+/*
+ * __ADDRESSABLE() is used to ensure the key symbol doesn't get stripped from
+ * the symbol table so that objtool can reference it when it generates the
+ * .static_call_sites section.
+ */
+#define __static_call(name)                                            \
+({                                                                     \
+       __ADDRESSABLE(STATIC_CALL_KEY(name));                           \
+       &STATIC_CALL_TRAMP(name);                                       \
+})
+
+#define static_call(name)      __static_call(name)
+
+#else
+
+#define static_call(name)                                              \
+       ((typeof(STATIC_CALL_TRAMP(name))*)(STATIC_CALL_KEY(name).func))
+
+#endif /* CONFIG_HAVE_STATIC_CALL */
+
 #endif /* _STATIC_CALL_TYPES_H */

diff --git a/tools/include/linux/static_call_types.h b/tools/include/linux/static_call_types.h
index 89135bb35bf7619bd3227612e16b17d7a7a88a43..08f78b1b88b47843a4d5b2b23fc8dfeee70c2704 100644 (file)
--- a/tools/include/linux/static_call_types.h
+++ b/tools/include/linux/static_call_types.h
@@ -4,6 +4,7 @@
 
 #include <linux/types.h>
 #include <linux/stringify.h>
+#include <linux/compiler.h>
 
 #define STATIC_CALL_KEY_PREFIX         __SCK__
 #define STATIC_CALL_KEY_PREFIX_STR     __stringify(STATIC_CALL_KEY_PREFIX)
@@ -32,4 +33,30 @@ struct static_call_site {
        s32 key;
 };
 
+#define DECLARE_STATIC_CALL(name, func)                                        \
+       extern struct static_call_key STATIC_CALL_KEY(name);            \
+       extern typeof(func) STATIC_CALL_TRAMP(name);
+
+#ifdef CONFIG_HAVE_STATIC_CALL
+
+/*
+ * __ADDRESSABLE() is used to ensure the key symbol doesn't get stripped from
+ * the symbol table so that objtool can reference it when it generates the
+ * .static_call_sites section.
+ */
+#define __static_call(name)                                            \
+({                                                                     \
+       __ADDRESSABLE(STATIC_CALL_KEY(name));                           \
+       &STATIC_CALL_TRAMP(name);                                       \
+})
+
+#define static_call(name)      __static_call(name)
+
+#else
+
+#define static_call(name)                                              \
+       ((typeof(STATIC_CALL_TRAMP(name))*)(STATIC_CALL_KEY(name).func))
+
+#endif /* CONFIG_HAVE_STATIC_CALL */
+
 #endif /* _STATIC_CALL_TYPES_H */