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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>
This commit is contained in:
Frederic Weisbecker 2009-03-21 04:33:36 +01:00 committed by Ingo Molnar
parent 22de89b371
commit 09c9e84d47
1 changed files with 4 additions and 4 deletions
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8
kernel/trace/ring_buffer.c
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@ -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); extern int ring_buffer_page_too_big(void);
#ifdef CONFIG_HOTPLUG_CPU #ifdef CONFIG_HOTPLUG_CPU
static int __cpuinit rb_cpu_notify(struct notifier_block *self, static int rb_cpu_notify(struct notifier_block *self,
unsigned long action, void *hcpu); unsigned long action, void *hcpu);
#endif #endif
/** /**
@ -2784,8 +2784,8 @@ static __init int rb_init_debugfs(void)
fs_initcall(rb_init_debugfs); fs_initcall(rb_init_debugfs);
#ifdef CONFIG_HOTPLUG_CPU #ifdef CONFIG_HOTPLUG_CPU
static int __cpuinit rb_cpu_notify(struct notifier_block *self, static int rb_cpu_notify(struct notifier_block *self,
unsigned long action, void *hcpu) unsigned long action, void *hcpu)
{ {
struct ring_buffer *buffer = struct ring_buffer *buffer =
container_of(self, struct ring_buffer, cpu_notify); container_of(self, struct ring_buffer, cpu_notify);