Merge branch 'master' into percpu

[mv-sheeva.git] / kernel / trace / trace.c

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 0df1b0f2cb9e0717f2a21f6923389c1978a1fa04..667ba805cd37d37af8d0a545452a1e2d1ec3d883 100644 (file)
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -91,12 +91,12 @@ DEFINE_PER_CPU(int, ftrace_cpu_disabled);
 static inline void ftrace_disable_cpu(void)
 {
        preempt_disable();
-       __this_cpu_inc(per_cpu_var(ftrace_cpu_disabled));
+       __this_cpu_inc(ftrace_cpu_disabled);
 }
 
 static inline void ftrace_enable_cpu(void)
 {
-       __this_cpu_dec(per_cpu_var(ftrace_cpu_disabled));
+       __this_cpu_dec(ftrace_cpu_disabled);
        preempt_enable();
 }
 
@@ -951,6 +951,11 @@ void trace_find_cmdline(int pid, char comm[])
                return;
        }
 
+       if (WARN_ON_ONCE(pid < 0)) {
+               strcpy(comm, "<XXX>");
+               return;
+       }
+
        if (pid > PID_MAX_DEFAULT) {
                strcpy(comm, "<...>");
                return;
@@ -1084,7 +1089,7 @@ trace_function(struct trace_array *tr,
        struct ftrace_entry *entry;
 
        /* If we are reading the ring buffer, don't trace */
-       if (unlikely(__this_cpu_read(per_cpu_var(ftrace_cpu_disabled))))
+       if (unlikely(__this_cpu_read(ftrace_cpu_disabled)))
                return;
 
        event = trace_buffer_lock_reserve(buffer, TRACE_FN, sizeof(*entry),