tracing: Replace syscall_meta_data struct array with pointer array
[linux-3.10.git] / kernel / trace / trace_syscalls.c
index b706529..5c9fe08 100644 (file)
@@ -55,20 +55,21 @@ struct ftrace_event_class event_class_syscall_exit = {
        .raw_init       = init_syscall_trace,
 };
 
-extern unsigned long __start_syscalls_metadata[];
-extern unsigned long __stop_syscalls_metadata[];
+extern struct syscall_metadata *__start_syscalls_metadata[];
+extern struct syscall_metadata *__stop_syscalls_metadata[];
 
 static struct syscall_metadata **syscalls_metadata;
 
-static struct syscall_metadata *find_syscall_meta(unsigned long syscall)
+static __init struct syscall_metadata *
+find_syscall_meta(unsigned long syscall)
 {
-       struct syscall_metadata *start;
-       struct syscall_metadata *stop;
+       struct syscall_metadata **start;
+       struct syscall_metadata **stop;
        char str[KSYM_SYMBOL_LEN];
 
 
-       start = (struct syscall_metadata *)__start_syscalls_metadata;
-       stop = (struct syscall_metadata *)__stop_syscalls_metadata;
+       start = __start_syscalls_metadata;
+       stop = __stop_syscalls_metadata;
        kallsyms_lookup(syscall, NULL, NULL, NULL, str);
 
        for ( ; start < stop; start++) {
@@ -78,8 +79,8 @@ static struct syscall_metadata *find_syscall_meta(unsigned long syscall)
                 * with "SyS" instead of "sys", leading to an unwanted
                 * mismatch.
                 */
-               if (start->name && !strcmp(start->name + 3, str + 3))
-                       return start;
+               if ((*start)->name && !strcmp((*start)->name + 3, str + 3))
+                       return *start;
        }
        return NULL;
 }