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Message-ID: <tip-c438f140cc16d47fac808d893f5017f6d641cb46@git.kernel.org>
Date: Mon, 29 Apr 2019 11:45:45 -0700
From: tip-bot for Thomas Gleixner <tipbot@...or.com>
To: linux-tip-commits@...r.kernel.org
Cc: penberg@...nel.org, rostedt@...dmis.org,
linux-kernel@...r.kernel.org, aryabinin@...tuozzo.com, clm@...com,
mingo@...nel.org, jpoimboe@...hat.com, luto@...nel.org,
josef@...icpanda.com, rientjes@...gle.com, akinobu.mita@...il.com,
mbenes@...e.cz, daniel@...ll.ch, tglx@...utronix.de,
dsterba@...e.com, airlied@...ux.ie, dvyukov@...gle.com,
hpa@...or.com, akpm@...ux-foundation.org,
jani.nikula@...ux.intel.com, glider@...gle.com, hch@....de,
rppt@...ux.vnet.ibm.com, catalin.marinas@....com,
snitzer@...hat.com, agk@...hat.com, rodrigo.vivi@...el.com,
adobriyan@...il.com, joonas.lahtinen@...ux.intel.com,
robin.murphy@....com, m.szyprowski@...sung.com,
tom.zanussi@...ux.intel.com, jthumshirn@...e.de, cl@...ux.com,
maarten.lankhorst@...ux.intel.com
Subject: [tip:core/stacktrace] tracing: Make ftrace_trace_userstack() static
and conditional
Commit-ID: c438f140cc16d47fac808d893f5017f6d641cb46
Gitweb: https://git.kernel.org/tip/c438f140cc16d47fac808d893f5017f6d641cb46
Author: Thomas Gleixner <tglx@...utronix.de>
AuthorDate: Thu, 25 Apr 2019 11:45:15 +0200
Committer: Thomas Gleixner <tglx@...utronix.de>
CommitDate: Mon, 29 Apr 2019 12:37:55 +0200
tracing: Make ftrace_trace_userstack() static and conditional
It's only used in trace.c and there is absolutely no point in compiling it
in when user space stack traces are not supported.
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Reviewed-by: Steven Rostedt <rostedt@...dmis.org>
Reviewed-by: Josh Poimboeuf <jpoimboe@...hat.com>
Cc: Andy Lutomirski <luto@...nel.org>
Cc: Alexander Potapenko <glider@...gle.com>
Cc: Alexey Dobriyan <adobriyan@...il.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Christoph Lameter <cl@...ux.com>
Cc: Pekka Enberg <penberg@...nel.org>
Cc: linux-mm@...ck.org
Cc: David Rientjes <rientjes@...gle.com>
Cc: Catalin Marinas <catalin.marinas@....com>
Cc: Dmitry Vyukov <dvyukov@...gle.com>
Cc: Andrey Ryabinin <aryabinin@...tuozzo.com>
Cc: kasan-dev@...glegroups.com
Cc: Mike Rapoport <rppt@...ux.vnet.ibm.com>
Cc: Akinobu Mita <akinobu.mita@...il.com>
Cc: Christoph Hellwig <hch@....de>
Cc: iommu@...ts.linux-foundation.org
Cc: Robin Murphy <robin.murphy@....com>
Cc: Marek Szyprowski <m.szyprowski@...sung.com>
Cc: Johannes Thumshirn <jthumshirn@...e.de>
Cc: David Sterba <dsterba@...e.com>
Cc: Chris Mason <clm@...com>
Cc: Josef Bacik <josef@...icpanda.com>
Cc: linux-btrfs@...r.kernel.org
Cc: dm-devel@...hat.com
Cc: Mike Snitzer <snitzer@...hat.com>
Cc: Alasdair Kergon <agk@...hat.com>
Cc: Daniel Vetter <daniel@...ll.ch>
Cc: intel-gfx@...ts.freedesktop.org
Cc: Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>
Cc: dri-devel@...ts.freedesktop.org
Cc: David Airlie <airlied@...ux.ie>
Cc: Jani Nikula <jani.nikula@...ux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@...el.com>
Cc: Tom Zanussi <tom.zanussi@...ux.intel.com>
Cc: Miroslav Benes <mbenes@...e.cz>
Cc: linux-arch@...r.kernel.org
Link: https://lkml.kernel.org/r/20190425094803.162400595@linutronix.de
---
kernel/trace/trace.c | 14 ++++++++------
kernel/trace/trace.h | 8 --------
2 files changed, 8 insertions(+), 14 deletions(-)
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 4fc93004feab..d8369d27c1af 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -159,6 +159,8 @@ static union trace_eval_map_item *trace_eval_maps;
#endif /* CONFIG_TRACE_EVAL_MAP_FILE */
static int tracing_set_tracer(struct trace_array *tr, const char *buf);
+static void ftrace_trace_userstack(struct ring_buffer *buffer,
+ unsigned long flags, int pc);
#define MAX_TRACER_SIZE 100
static char bootup_tracer_buf[MAX_TRACER_SIZE] __initdata;
@@ -2905,9 +2907,10 @@ void trace_dump_stack(int skip)
}
EXPORT_SYMBOL_GPL(trace_dump_stack);
+#ifdef CONFIG_USER_STACKTRACE_SUPPORT
static DEFINE_PER_CPU(int, user_stack_count);
-void
+static void
ftrace_trace_userstack(struct ring_buffer *buffer, unsigned long flags, int pc)
{
struct trace_event_call *call = &event_user_stack;
@@ -2958,13 +2961,12 @@ ftrace_trace_userstack(struct ring_buffer *buffer, unsigned long flags, int pc)
out:
preempt_enable();
}
-
-#ifdef UNUSED
-static void __trace_userstack(struct trace_array *tr, unsigned long flags)
+#else /* CONFIG_USER_STACKTRACE_SUPPORT */
+static void ftrace_trace_userstack(struct ring_buffer *buffer,
+ unsigned long flags, int pc)
{
- ftrace_trace_userstack(tr, flags, preempt_count());
}
-#endif /* UNUSED */
+#endif /* !CONFIG_USER_STACKTRACE_SUPPORT */
#endif /* CONFIG_STACKTRACE */
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index d80cee49e0eb..639047b259d7 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -782,17 +782,9 @@ void update_max_tr_single(struct trace_array *tr,
#endif /* CONFIG_TRACER_MAX_TRACE */
#ifdef CONFIG_STACKTRACE
-void ftrace_trace_userstack(struct ring_buffer *buffer, unsigned long flags,
- int pc);
-
void __trace_stack(struct trace_array *tr, unsigned long flags, int skip,
int pc);
#else
-static inline void ftrace_trace_userstack(struct ring_buffer *buffer,
- unsigned long flags, int pc)
-{
-}
-
static inline void __trace_stack(struct trace_array *tr, unsigned long flags,
int skip, int pc)
{
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