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Subject[PATCH tip 1/1] trace: Make the trace_event callbacks return enum print_line_t
As they actually all return these enumerators.

Reported-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/block/blktrace.c b/block/blktrace.c
index 12df276..c7698d1 100644
--- a/block/blktrace.c
+++ b/block/blktrace.c
@@ -1158,7 +1158,8 @@ static struct {
[__BLK_TA_REMAP] = {{ "A", "remap" }, blk_log_remap },
};

-static int blk_trace_event_print(struct trace_iterator *iter, int flags)
+static enum print_line_t blk_trace_event_print(struct trace_iterator *iter,
+ int flags)
{
struct trace_seq *s = &iter->seq;
const struct blk_io_trace *t = (struct blk_io_trace *)iter->ent;
@@ -1196,7 +1197,8 @@ static int blk_trace_synthesize_old_trace(struct trace_iterator *iter)
sizeof(old) - offset + t->pdu_len);
}

-static int blk_trace_event_print_binary(struct trace_iterator *iter, int flags)
+static enum print_line_t
+blk_trace_event_print_binary(struct trace_iterator *iter, int flags)
{
return blk_trace_synthesize_old_trace(iter) ?
TRACE_TYPE_HANDLED : TRACE_TYPE_PARTIAL_LINE;
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 5822ff4..fd51cf0 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -1495,7 +1495,7 @@ static enum print_line_t print_hex_fmt(struct trace_iterator *iter)

event = ftrace_find_event(entry->type);
if (event && event->hex) {
- int ret = event->hex(iter, 0);
+ enum print_line_t ret = event->hex(iter, 0);
if (ret != TRACE_TYPE_HANDLED)
return ret;
}
diff --git a/kernel/trace/trace_branch.c b/kernel/trace/trace_branch.c
index f6b35e1..7ac72a4 100644
--- a/kernel/trace/trace_branch.c
+++ b/kernel/trace/trace_branch.c
@@ -160,7 +160,8 @@ trace_print_print(struct trace_seq *s, struct trace_entry *entry, int flags)
return TRACE_TYPE_PARTIAL_LINE;
}

-static int trace_branch_print(struct trace_iterator *iter, int flags)
+static enum print_line_t trace_branch_print(struct trace_iterator *iter,
+ int flags)
{
struct trace_branch *field;

diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c
index 5b3c914..b7380ee 100644
--- a/kernel/trace/trace_output.c
+++ b/kernel/trace/trace_output.c
@@ -463,13 +463,14 @@ int unregister_ftrace_event(struct trace_event *event)
* Standard events
*/

-int trace_nop_print(struct trace_iterator *iter, int flags)
+enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags)
{
return TRACE_TYPE_HANDLED;
}

/* TRACE_FN */
-static int trace_fn_latency(struct trace_iterator *iter, int flags)
+static enum print_line_t trace_fn_latency(struct trace_iterator *iter,
+ int flags)
{
struct ftrace_entry *field;
struct trace_seq *s = &iter->seq;
@@ -491,7 +492,7 @@ static int trace_fn_latency(struct trace_iterator *iter, int flags)
return TRACE_TYPE_PARTIAL_LINE;
}

-static int trace_fn_trace(struct trace_iterator *iter, int flags)
+static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags)
{
struct ftrace_entry *field;
struct trace_seq *s = &iter->seq;
@@ -518,7 +519,7 @@ static int trace_fn_trace(struct trace_iterator *iter, int flags)
return TRACE_TYPE_PARTIAL_LINE;
}

-static int trace_fn_raw(struct trace_iterator *iter, int flags)
+static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags)
{
struct ftrace_entry *field;

@@ -532,7 +533,7 @@ static int trace_fn_raw(struct trace_iterator *iter, int flags)
return TRACE_TYPE_HANDLED;
}

-static int trace_fn_hex(struct trace_iterator *iter, int flags)
+static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags)
{
struct ftrace_entry *field;
struct trace_seq *s = &iter->seq;
@@ -545,7 +546,7 @@ static int trace_fn_hex(struct trace_iterator *iter, int flags)
return TRACE_TYPE_HANDLED;
}

-static int trace_fn_bin(struct trace_iterator *iter, int flags)
+static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags)
{
struct ftrace_entry *field;
struct trace_seq *s = &iter->seq;
@@ -568,7 +569,8 @@ static struct trace_event trace_fn_event = {
};

/* TRACE_CTX an TRACE_WAKE */
-static int trace_ctxwake_print(struct trace_iterator *iter, char *delim)
+static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter,
+ char *delim)
{
struct ctx_switch_entry *field;
char *comm;
@@ -593,12 +595,13 @@ static int trace_ctxwake_print(struct trace_iterator *iter, char *delim)
return TRACE_TYPE_HANDLED;
}

-static int trace_ctx_print(struct trace_iterator *iter, int flags)
+static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags)
{
return trace_ctxwake_print(iter, "==>");
}

-static int trace_wake_print(struct trace_iterator *iter, int flags)
+static enum print_line_t trace_wake_print(struct trace_iterator *iter,
+ int flags)
{
return trace_ctxwake_print(iter, " +");
}
@@ -626,12 +629,12 @@ static int trace_ctxwake_raw(struct trace_iterator *iter, char S)
return TRACE_TYPE_HANDLED;
}

-static int trace_ctx_raw(struct trace_iterator *iter, int flags)
+static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags)
{
return trace_ctxwake_raw(iter, 0);
}

-static int trace_wake_raw(struct trace_iterator *iter, int flags)
+static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags)
{
return trace_ctxwake_raw(iter, '+');
}
@@ -660,17 +663,18 @@ static int trace_ctxwake_hex(struct trace_iterator *iter, char S)
return TRACE_TYPE_HANDLED;
}

-static int trace_ctx_hex(struct trace_iterator *iter, int flags)
+static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags)
{
return trace_ctxwake_hex(iter, 0);
}

-static int trace_wake_hex(struct trace_iterator *iter, int flags)
+static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags)
{
return trace_ctxwake_hex(iter, '+');
}

-static int trace_ctxwake_bin(struct trace_iterator *iter, int flags)
+static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter,
+ int flags)
{
struct ctx_switch_entry *field;
struct trace_seq *s = &iter->seq;
@@ -706,7 +710,8 @@ static struct trace_event trace_wake_event = {
};

/* TRACE_SPECIAL */
-static int trace_special_print(struct trace_iterator *iter, int flags)
+static enum print_line_t trace_special_print(struct trace_iterator *iter,
+ int flags)
{
struct special_entry *field;

@@ -721,7 +726,8 @@ static int trace_special_print(struct trace_iterator *iter, int flags)
return TRACE_TYPE_HANDLED;
}

-static int trace_special_hex(struct trace_iterator *iter, int flags)
+static enum print_line_t trace_special_hex(struct trace_iterator *iter,
+ int flags)
{
struct special_entry *field;
struct trace_seq *s = &iter->seq;
@@ -735,7 +741,8 @@ static int trace_special_hex(struct trace_iterator *iter, int flags)
return TRACE_TYPE_HANDLED;
}

-static int trace_special_bin(struct trace_iterator *iter, int flags)
+static enum print_line_t trace_special_bin(struct trace_iterator *iter,
+ int flags)
{
struct special_entry *field;
struct trace_seq *s = &iter->seq;
@@ -760,7 +767,8 @@ static struct trace_event trace_special_event = {

/* TRACE_STACK */

-static int trace_stack_print(struct trace_iterator *iter, int flags)
+static enum print_line_t trace_stack_print(struct trace_iterator *iter,
+ int flags)
{
struct stack_entry *field;
struct trace_seq *s = &iter->seq;
@@ -796,7 +804,8 @@ static struct trace_event trace_stack_event = {
};

/* TRACE_USER_STACK */
-static int trace_user_stack_print(struct trace_iterator *iter, int flags)
+static enum print_line_t trace_user_stack_print(struct trace_iterator *iter,
+ int flags)
{
struct userstack_entry *field;
struct trace_seq *s = &iter->seq;
@@ -825,7 +834,8 @@ static struct trace_event trace_user_stack_event = {
};

/* TRACE_PRINT */
-static int trace_print_print(struct trace_iterator *iter, int flags)
+static enum print_line_t trace_print_print(struct trace_iterator *iter,
+ int flags)
{
struct print_entry *field;
struct trace_seq *s = &iter->seq;
@@ -844,7 +854,7 @@ static int trace_print_print(struct trace_iterator *iter, int flags)
return TRACE_TYPE_PARTIAL_LINE;
}

-static int trace_print_raw(struct trace_iterator *iter, int flags)
+static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags)
{
struct print_entry *field;

diff --git a/kernel/trace/trace_output.h b/kernel/trace/trace_output.h
index 3aeb31f..551a25a 100644
--- a/kernel/trace/trace_output.h
+++ b/kernel/trace/trace_output.h
@@ -3,7 +3,8 @@

#include "trace.h"

-typedef int (*trace_print_func)(struct trace_iterator *iter, int flags);
+typedef enum print_line_t (*trace_print_func)(struct trace_iterator *iter,
+ int flags);

struct trace_event {
struct hlist_node node;
@@ -39,7 +40,7 @@ struct trace_event *ftrace_find_event(int type);
int register_ftrace_event(struct trace_event *event);
int unregister_ftrace_event(struct trace_event *event);

-int trace_nop_print(struct trace_iterator *iter, int flags);
+enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags);

#define MAX_MEMHEX_BYTES 8
#define HEX_CHARS (MAX_MEMHEX_BYTES*2 + 1)

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