[PATCH 3/3 v2] tracing/kprobe: cleanup unused return value of function

From: Xiao Guangrong
Date: Tue Jan 19 2010 - 03:43:34 EST


Those function's return value is meaningless

Acked-by: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
Signed-off-by: Xiao Guangrong <xiaoguangrong@xxxxxxxxxxxxxx>
---
kernel/trace/trace_kprobe.c | 28 ++++++++++++++--------------
1 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index 2714d23..de2cf85 100644
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -942,7 +942,7 @@ static const struct file_operations kprobe_profile_ops = {
};

/* Kprobe handler */
-static __kprobes int kprobe_trace_func(struct kprobe *kp, struct pt_regs *regs)
+static __kprobes void kprobe_trace_func(struct kprobe *kp, struct pt_regs *regs)
{
struct trace_probe *tp = container_of(kp, struct trace_probe, rp.kp);
struct kprobe_trace_entry *entry;
@@ -962,7 +962,7 @@ static __kprobes int kprobe_trace_func(struct kprobe *kp, struct pt_regs *regs)
event = trace_current_buffer_lock_reserve(&buffer, call->id, size,
irq_flags, pc);
if (!event)
- return 0;
+ return ;

entry = ring_buffer_event_data(event);
entry->nargs = tp->nr_args;
@@ -972,11 +972,11 @@ static __kprobes int kprobe_trace_func(struct kprobe *kp, struct pt_regs *regs)

if (!filter_current_check_discard(buffer, call, entry, event))
trace_nowake_buffer_unlock_commit(buffer, event, irq_flags, pc);
- return 0;
+ return ;
}

/* Kretprobe handler */
-static __kprobes int kretprobe_trace_func(struct kretprobe_instance *ri,
+static __kprobes void kretprobe_trace_func(struct kretprobe_instance *ri,
struct pt_regs *regs)
{
struct trace_probe *tp = container_of(ri->rp, struct trace_probe, rp);
@@ -995,7 +995,7 @@ static __kprobes int kretprobe_trace_func(struct kretprobe_instance *ri,
event = trace_current_buffer_lock_reserve(&buffer, call->id, size,
irq_flags, pc);
if (!event)
- return 0;
+ return ;

entry = ring_buffer_event_data(event);
entry->nargs = tp->nr_args;
@@ -1007,7 +1007,7 @@ static __kprobes int kretprobe_trace_func(struct kretprobe_instance *ri,
if (!filter_current_check_discard(buffer, call, entry, event))
trace_nowake_buffer_unlock_commit(buffer, event, irq_flags, pc);

- return 0;
+ return ;
}

/* Event entry printers */
@@ -1217,7 +1217,7 @@ static int set_print_fmt(struct trace_probe *tp)
#ifdef CONFIG_PERF_EVENTS

/* Kprobe profile handler */
-static __kprobes int kprobe_profile_func(struct kprobe *kp,
+static __kprobes void kprobe_profile_func(struct kprobe *kp,
struct pt_regs *regs)
{
struct trace_probe *tp = container_of(kp, struct trace_probe, rp.kp);
@@ -1232,11 +1232,11 @@ static __kprobes int kprobe_profile_func(struct kprobe *kp,
size -= sizeof(u32);
if (WARN_ONCE(size > FTRACE_MAX_PROFILE_SIZE,
"profile buffer not large enough"))
- return 0;
+ return ;

entry = ftrace_perf_buf_prepare(size, call->id, &rctx, &irq_flags);
if (!entry)
- return 0;
+ return ;

entry->nargs = tp->nr_args;
entry->ip = (unsigned long)kp->addr;
@@ -1245,11 +1245,11 @@ static __kprobes int kprobe_profile_func(struct kprobe *kp,

ftrace_perf_buf_submit(entry, size, rctx, entry->ip, 1, irq_flags);

- return 0;
+ return ;
}

/* Kretprobe profile handler */
-static __kprobes int kretprobe_profile_func(struct kretprobe_instance *ri,
+static __kprobes void kretprobe_profile_func(struct kretprobe_instance *ri,
struct pt_regs *regs)
{
struct trace_probe *tp = container_of(ri->rp, struct trace_probe, rp);
@@ -1264,11 +1264,11 @@ static __kprobes int kretprobe_profile_func(struct kretprobe_instance *ri,
size -= sizeof(u32);
if (WARN_ONCE(size > FTRACE_MAX_PROFILE_SIZE,
"profile buffer not large enough"))
- return 0;
+ return ;

entry = ftrace_perf_buf_prepare(size, call->id, &rctx, &irq_flags);
if (!entry)
- return 0;
+ return ;

entry->nargs = tp->nr_args;
entry->func = (unsigned long)tp->rp.kp.addr;
@@ -1278,7 +1278,7 @@ static __kprobes int kretprobe_profile_func(struct kretprobe_instance *ri,

ftrace_perf_buf_submit(entry, size, rctx, entry->ret_ip, 1, irq_flags);

- return 0;
+ return ;
}

static int probe_profile_enable(struct ftrace_event_call *call)
--
1.6.1.2


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