From: Oleg Nesterov <oleg@redhat.com>
To: Namhyung Kim <namhyung@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>,
Frederic Weisbecker <fweisbec@gmail.com>,
Ingo Molnar <mingo@kernel.org>,
Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>,
LKML <linux-kernel@vger.kernel.org>,
Namhyung Kim <namhyung.kim@lge.com>,
Srikar Dronamraju <srikar@linux.vnet.ibm.com>,
"zhangwei(Jovi)" <jovi.zhangwei@huawei.com>,
Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Subject: Re: [PATCH 2/2] tracing/probes: Fix basic print type functions
Date: Wed, 20 Nov 2013 16:22:45 +0100 [thread overview]
Message-ID: <20131120152245.GB24734@redhat.com> (raw)
In-Reply-To: <1384749649-31447-2-git-send-email-namhyung@kernel.org>
On 11/18, Namhyung Kim wrote:
>
> -DEFINE_BASIC_PRINT_TYPE_FUNC(u8, "%x", unsigned int)
> -DEFINE_BASIC_PRINT_TYPE_FUNC(u16, "%x", unsigned int)
> -DEFINE_BASIC_PRINT_TYPE_FUNC(u32, "%lx", unsigned long)
> +DEFINE_BASIC_PRINT_TYPE_FUNC(u8 , "%x", unsigned char)
> +DEFINE_BASIC_PRINT_TYPE_FUNC(u16, "%x", unsigned short)
> +DEFINE_BASIC_PRINT_TYPE_FUNC(u32, "%x", unsigned int)
> +DEFINE_BASIC_PRINT_TYPE_FUNC(s8, "%d", signed char)
> +DEFINE_BASIC_PRINT_TYPE_FUNC(s16, "%d", short)
> +DEFINE_BASIC_PRINT_TYPE_FUNC(s32, "%d", int)
> +#if BITS_PER_LONG == 32
> DEFINE_BASIC_PRINT_TYPE_FUNC(u64, "%llx", unsigned long long)
> -DEFINE_BASIC_PRINT_TYPE_FUNC(s8, "%d", int)
> -DEFINE_BASIC_PRINT_TYPE_FUNC(s16, "%d", int)
> -DEFINE_BASIC_PRINT_TYPE_FUNC(s32, "%ld", long)
> DEFINE_BASIC_PRINT_TYPE_FUNC(s64, "%lld", long long)
> +#else /* BITS_PER_LONG == 64 */
> +DEFINE_BASIC_PRINT_TYPE_FUNC(u64, "%lx", unsigned long)
> +DEFINE_BASIC_PRINT_TYPE_FUNC(s64, "%ld", long)
> +#endif
I must have missed something... Not only I do not understand why
do we need "#if BITS_PER_LONG", I can't understand why
DEFINE_BASIC_PRINT_TYPE_FUNC() needs "cast" argument.
IOW, how about the patch below instead?
Oleg.
--- x/kernel/trace/trace_probe.c
+++ x/kernel/trace/trace_probe.c
@@ -40,23 +40,23 @@ const char *reserved_field_names[] = {
#define PRINT_TYPE_FMT_NAME(type) print_type_format_##type
/* Printing in basic type function template */
-#define DEFINE_BASIC_PRINT_TYPE_FUNC(type, fmt, cast) \
+#define DEFINE_BASIC_PRINT_TYPE_FUNC(type, fmt) \
static __kprobes int PRINT_TYPE_FUNC_NAME(type)(struct trace_seq *s, \
const char *name, \
- void *data, void *ent)\
+ void *data, void *ent) \
{ \
- return trace_seq_printf(s, " %s=" fmt, name, (cast)*(type *)data);\
+ return trace_seq_printf(s, " %s=" fmt, name, *(type *)data); \
} \
static const char PRINT_TYPE_FMT_NAME(type)[] = fmt;
-DEFINE_BASIC_PRINT_TYPE_FUNC(u8, "%x", unsigned int)
-DEFINE_BASIC_PRINT_TYPE_FUNC(u16, "%x", unsigned int)
-DEFINE_BASIC_PRINT_TYPE_FUNC(u32, "%lx", unsigned long)
-DEFINE_BASIC_PRINT_TYPE_FUNC(u64, "%llx", unsigned long long)
-DEFINE_BASIC_PRINT_TYPE_FUNC(s8, "%d", int)
-DEFINE_BASIC_PRINT_TYPE_FUNC(s16, "%d", int)
-DEFINE_BASIC_PRINT_TYPE_FUNC(s32, "%ld", long)
-DEFINE_BASIC_PRINT_TYPE_FUNC(s64, "%lld", long long)
+DEFINE_BASIC_PRINT_TYPE_FUNC(u8, "%x")
+DEFINE_BASIC_PRINT_TYPE_FUNC(u16, "%x")
+DEFINE_BASIC_PRINT_TYPE_FUNC(u32, "%x")
+DEFINE_BASIC_PRINT_TYPE_FUNC(u64, "%Lx")
+DEFINE_BASIC_PRINT_TYPE_FUNC(s8, "%d")
+DEFINE_BASIC_PRINT_TYPE_FUNC(s16, "%d")
+DEFINE_BASIC_PRINT_TYPE_FUNC(s32, "%d")
+DEFINE_BASIC_PRINT_TYPE_FUNC(s64, "%Ld")
static inline void *get_rloc_data(u32 *dl)
{
next prev parent reply other threads:[~2013-11-20 15:21 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-18 4:40 [PATCH 1/2] tracing/uprobes: Fix documentation of uprobe registration syntax Namhyung Kim
2013-11-18 4:40 ` [PATCH 2/2] tracing/probes: Fix basic print type functions Namhyung Kim
2013-11-20 15:22 ` Oleg Nesterov [this message]
2013-11-22 6:05 ` Namhyung Kim
2013-11-22 8:10 ` Masami Hiramatsu
2013-11-20 15:19 ` [PATCH 1/2] tracing/uprobes: Fix documentation of uprobe registration syntax Oleg Nesterov
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