fix: tracepoint: Optimize using static_call() (v5.10)

[lttng-modules.git] / wrapper / tracepoint.h

diff --git a/wrapper/tracepoint.h b/wrapper/tracepoint.h
index 23bc6e2590fedcc21072f0eb2d91dd45d95beb86..bc19d8c123139cd27aceea1c579b9f962e7e044f 100644 (file)
--- a/wrapper/tracepoint.h
+++ b/wrapper/tracepoint.h
@@ -14,10 +14,12 @@
 #include <linux/tracepoint.h>
 #include <linux/module.h>
 
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,35))
-
-#define DECLARE_EVENT_CLASS(name, proto, args, tstruct, assign, print)
-
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,10,0))
+#define LTTNG_DEFINE_TRACE(name, proto, args)          \
+       DEFINE_TRACE(name, PARAMS(proto), PARAMS(args))
+#else
+#define LTTNG_DEFINE_TRACE(name, proto, args)          \
+       DEFINE_TRACE(name)
 #endif
 
 #ifndef HAVE_KABI_2635_TRACEPOINT
@@ -52,7 +54,7 @@ void lttng_tracepoint_exit(void)
 
 #endif /* #else #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,15,0)) */
 
-#ifdef CONFIG_MODULE_SIG
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3,15,0) && defined(CONFIG_MODULE_SIG))
 
 #include <linux/kallsyms.h>
 #include <wrapper/kallsyms.h>
@@ -74,9 +76,20 @@ int wrapper_tracepoint_module_notify(struct notifier_block *nb,
        }
 }
 
-#endif /* CONFIG_MODULE_SIG */
+/*
+ * No canary for 'tracepoint_module_notify()', it's only defined in 'kernel/tracepoint.c'.
+ *
+ * static inline
+ * int __canary__tracepoint_module_notify(struct notifier_block *nb,
+ *             unsigned long val, struct module *mod)
+ * {
+ *     return tracepoint_module_notify(nb, val, mod);
+ * }
+ */
+
+#endif /* #if (LINUX_VERSION_CODE < KERNEL_VERSION(3,15,0) && defined(CONFIG_MODULE_SIG)) */
 
-#if defined(CONFIG_MODULE_SIG) && defined(MODULE)
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(3,15,0) && defined(CONFIG_MODULE_SIG) && defined(MODULE))
 
 static inline
 int wrapper_lttng_fixup_sig(struct module *mod)
@@ -97,7 +110,7 @@ int wrapper_lttng_fixup_sig(struct module *mod)
        return ret;
 }
 
-#else /* #if defined(CONFIG_MODULE_SIG) && defined(MODULE) */
+#else /* #if (LINUX_VERSION_CODE < KERNEL_VERSION(3,15,0) && defined(CONFIG_MODULE_SIG) && defined(MODULE)) */
 
 static inline
 int wrapper_lttng_fixup_sig(struct module *mod)
@@ -105,7 +118,7 @@ int wrapper_lttng_fixup_sig(struct module *mod)
        return 0;
 }
 
-#endif /*#else #if defined(CONFIG_MODULE_SIG) && defined(MODULE) */
+#endif /* #else #if (LINUX_VERSION_CODE < KERNEL_VERSION(3,15,0) && defined(CONFIG_MODULE_SIG) && defined(MODULE)) */
 
 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,19,0))
 static inline struct tracepoint *lttng_tracepoint_ptr_deref(tracepoint_ptr_t *p)
@@ -113,7 +126,7 @@ static inline struct tracepoint *lttng_tracepoint_ptr_deref(tracepoint_ptr_t *p)
        return tracepoint_ptr_deref(p);
 }
 #else /* #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,19,0)) */
-static inline struct tracepoint *lttng_tracepoint_ptr_deref(struct tracepoint **p)
+static inline struct tracepoint *lttng_tracepoint_ptr_deref(struct tracepoint * const *p)
 {
        return *p;
 }