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authorFrederic Weisbecker <fweisbec@gmail.com>2009-03-21 04:33:36 +0100
committerIngo Molnar <mingo@elte.hu>2009-03-21 10:54:10 +0100
commit09c9e84d474d917d9de5b9011ed2064b03a19677 (patch)
treec725429e52c2c06822f189d05c8fe9d811e17891
parent22de89b371a18086162eacd9f8c960299334ab01 (diff)
tracing/ring-buffer: don't annotate rb_cpu_notify with __cpuinit
Impact: remove a section warning CONFIG_DEBUG_SECTION_MISMATCH raises the following warning on -tip: WARNING: kernel/trace/built-in.o(.text+0x5bc5): Section mismatch in reference from the function ring_buffer_alloc() to the function .cpuinit.text:rb_cpu_notify() The function ring_buffer_alloc() references the function __cpuinit rb_cpu_notify(). This is actually harmless. The code in the ring buffer don't build rb_cpu_notify and other cpu hotplug stuffs when !CONFIG_HOTPLUG_CPU so we have no risk to reference freed memory here (it would even be harmless if we unconditionally build it because register_cpu_notifier would do nothing when !CONFIG_HOTPLUG_CPU. But since ring_buffer_alloc() can be called everytime, we don't want it to be annotated with __cpuinit so we drop the __cpuinit from rb_cpu_notify. This is not a waste of memory because it is only defined and used on CONFIG_HOTPLUG_CPU. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Steven Rostedt <rostedt@goodmis.org> LKML-Reference: <1237606416-22268-1-git-send-email-fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
-rw-r--r--kernel/trace/ring_buffer.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index 384ca5d9d72..808b14bbf07 100644
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -535,8 +535,8 @@ static void rb_free_cpu_buffer(struct ring_buffer_per_cpu *cpu_buffer)
extern int ring_buffer_page_too_big(void);
#ifdef CONFIG_HOTPLUG_CPU
-static int __cpuinit rb_cpu_notify(struct notifier_block *self,
- unsigned long action, void *hcpu);
+static int rb_cpu_notify(struct notifier_block *self,
+ unsigned long action, void *hcpu);
#endif
/**
@@ -2784,8 +2784,8 @@ static __init int rb_init_debugfs(void)
fs_initcall(rb_init_debugfs);
#ifdef CONFIG_HOTPLUG_CPU
-static int __cpuinit rb_cpu_notify(struct notifier_block *self,
- unsigned long action, void *hcpu)
+static int rb_cpu_notify(struct notifier_block *self,
+ unsigned long action, void *hcpu)
{
struct ring_buffer *buffer =
container_of(self, struct ring_buffer, cpu_notify);