tracing/kprobes: Pass trace_probe directly from dispatcher

Pass the pointer of struct trace_probe directly from probe
dispatcher to handlers. This removes redundant container_of
macro uses. Same thing has already done in trace_uprobe.

Link: http://lkml.kernel.org/r/20130509054441.30398.69112.stgit@mhiramat-M0-7522
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Tom Zanussi <tom.zanussi@intel.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index 6e86fbb..9ca44fc 100644 (file)
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -723,9 +723,9 @@ static __kprobes void store_trace_args(int ent_size, struct trace_probe *tp,
 }
 
 /* Kprobe handler */
-static __kprobes void kprobe_trace_func(struct kprobe *kp, struct pt_regs *regs)
+static __kprobes void
+kprobe_trace_func(struct trace_probe *tp, struct pt_regs *regs)
 {
-       struct trace_probe *tp = container_of(kp, struct trace_probe, rp.kp);
        struct kprobe_trace_entry_head *entry;
        struct ring_buffer_event *event;
        struct ring_buffer *buffer;
@@ -745,7 +745,7 @@ static __kprobes void kprobe_trace_func(struct kprobe *kp, struct pt_regs *regs)
                return;
 
        entry = ring_buffer_event_data(event);
-       entry->ip = (unsigned long)kp->addr;
+       entry->ip = (unsigned long)tp->rp.kp.addr;
        store_trace_args(sizeof(*entry), tp, regs, (u8 *)&entry[1], dsize);
 
        if (!filter_current_check_discard(buffer, call, entry, event))
@@ -754,10 +754,10 @@ static __kprobes void kprobe_trace_func(struct kprobe *kp, struct pt_regs *regs)
 }
 
 /* Kretprobe handler */
-static __kprobes void kretprobe_trace_func(struct kretprobe_instance *ri,
-                                         struct pt_regs *regs)
+static __kprobes void
+kretprobe_trace_func(struct trace_probe *tp, struct kretprobe_instance *ri,
+                    struct pt_regs *regs)
 {
-       struct trace_probe *tp = container_of(ri->rp, struct trace_probe, rp);
        struct kretprobe_trace_entry_head *entry;
        struct ring_buffer_event *event;
        struct ring_buffer *buffer;
@@ -973,10 +973,9 @@ static int set_print_fmt(struct trace_probe *tp)
 #ifdef CONFIG_PERF_EVENTS
 
 /* Kprobe profile handler */
-static __kprobes void kprobe_perf_func(struct kprobe *kp,
-                                        struct pt_regs *regs)
+static __kprobes void
+kprobe_perf_func(struct trace_probe *tp, struct pt_regs *regs)
 {
-       struct trace_probe *tp = container_of(kp, struct trace_probe, rp.kp);
        struct ftrace_event_call *call = &tp->call;
        struct kprobe_trace_entry_head *entry;
        struct hlist_head *head;
@@ -995,7 +994,7 @@ static __kprobes void kprobe_perf_func(struct kprobe *kp,
        if (!entry)
                return;
 
-       entry->ip = (unsigned long)kp->addr;
+       entry->ip = (unsigned long)tp->rp.kp.addr;
        memset(&entry[1], 0, dsize);
        store_trace_args(sizeof(*entry), tp, regs, (u8 *)&entry[1], dsize);
 
@@ -1005,10 +1004,10 @@ static __kprobes void kprobe_perf_func(struct kprobe *kp,
 }
 
 /* Kretprobe profile handler */
-static __kprobes void kretprobe_perf_func(struct kretprobe_instance *ri,
-                                           struct pt_regs *regs)
+static __kprobes void
+kretprobe_perf_func(struct trace_probe *tp, struct kretprobe_instance *ri,
+                   struct pt_regs *regs)
 {
-       struct trace_probe *tp = container_of(ri->rp, struct trace_probe, rp);
        struct ftrace_event_call *call = &tp->call;
        struct kretprobe_trace_entry_head *entry;
        struct hlist_head *head;
@@ -1074,10 +1073,10 @@ int kprobe_dispatcher(struct kprobe *kp, struct pt_regs *regs)
        tp->nhit++;
 
        if (tp->flags & TP_FLAG_TRACE)
-               kprobe_trace_func(kp, regs);
+               kprobe_trace_func(tp, regs);
 #ifdef CONFIG_PERF_EVENTS
        if (tp->flags & TP_FLAG_PROFILE)
-               kprobe_perf_func(kp, regs);
+               kprobe_perf_func(tp, regs);
 #endif
        return 0;       /* We don't tweek kernel, so just return 0 */
 }
@@ -1090,10 +1089,10 @@ int kretprobe_dispatcher(struct kretprobe_instance *ri, struct pt_regs *regs)
        tp->nhit++;
 
        if (tp->flags & TP_FLAG_TRACE)
-               kretprobe_trace_func(ri, regs);
+               kretprobe_trace_func(tp, ri, regs);
 #ifdef CONFIG_PERF_EVENTS
        if (tp->flags & TP_FLAG_PROFILE)
-               kretprobe_perf_func(ri, regs);
+               kretprobe_perf_func(tp, ri, regs);
 #endif
        return 0;       /* We don't tweek kernel, so just return 0 */
 }