Merge branch 'acpi-misc'

[linux-2.6-microblaze.git] / include / linux / static_call_types.h

diff --git a/include/linux/static_call_types.h b/include/linux/static_call_types.h
index 89135bb..ae5662d 100644 (file)
--- a/include/linux/static_call_types.h
+++ b/include/linux/static_call_types.h
@@ -4,11 +4,13 @@
 
 #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)
 #define STATIC_CALL_KEY_PREFIX_LEN     (sizeof(STATIC_CALL_KEY_PREFIX_STR) - 1)
 #define STATIC_CALL_KEY(name)          __PASTE(STATIC_CALL_KEY_PREFIX, name)
+#define STATIC_CALL_KEY_STR(name)      __stringify(STATIC_CALL_KEY(name))
 
 #define STATIC_CALL_TRAMP_PREFIX       __SCT__
 #define STATIC_CALL_TRAMP_PREFIX_STR   __stringify(STATIC_CALL_TRAMP_PREFIX)
@@ -32,4 +34,52 @@ 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
+
+#define __raw_static_call(name)        (&STATIC_CALL_TRAMP(name))
+
+#ifdef CONFIG_HAVE_STATIC_CALL_INLINE
+
+/*
+ * __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_ADDRESSABLE(name) \
+       __ADDRESSABLE(STATIC_CALL_KEY(name))
+
+#define __static_call(name)                                            \
+({                                                                     \
+       __STATIC_CALL_ADDRESSABLE(name);                                \
+       __raw_static_call(name);                                        \
+})
+
+#else /* !CONFIG_HAVE_STATIC_CALL_INLINE */
+
+#define __STATIC_CALL_ADDRESSABLE(name)
+#define __static_call(name)    __raw_static_call(name)
+
+#endif /* CONFIG_HAVE_STATIC_CALL_INLINE */
+
+#ifdef MODULE
+#define __STATIC_CALL_MOD_ADDRESSABLE(name)
+#define static_call_mod(name)  __raw_static_call(name)
+#else
+#define __STATIC_CALL_MOD_ADDRESSABLE(name) __STATIC_CALL_ADDRESSABLE(name)
+#define static_call_mod(name)  __static_call(name)
+#endif
+
+#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 */