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[PATCH] hotplug CPU: clean up hotcpu_notifier() use

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There was lots of #ifdef noise in the kernel due to hotcpu_notifier(fn,
prio) not correctly marking 'fn' as used in the !HOTPLUG_CPU case, and thus
generating compiler warnings of unused symbols, hence forcing people to add
#ifdefs.

the compiler can skip truly unused functions just fine:

    text    data     bss     dec     hex filename
 1624412  728710 3674856 6027978  5bfaca vmlinux.before
 1624412  728710 3674856 6027978  5bfaca vmlinux.after

[[email protected]: topology.c fix]
Signed-off-by: Ingo Molnar <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Ingo Molnar 2006-12-06 20:38:17 -08:00 • committed by Linus Torvalds
commit 0231606785
25 changed files with 8 additions and 56 deletions
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3
kernel/profile.c
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@ -319,7 +319,6 @@ out:
put_cpu();
}
#ifdef CONFIG_HOTPLUG_CPU
static int __devinit profile_cpu_callback(struct notifier_block *info,
unsigned long action, void *__cpu)
{
@ -372,10 +371,10 @@ static int __devinit profile_cpu_callback(struct notifier_block *info,
}
return NOTIFY_OK;
}
#endif /* CONFIG_HOTPLUG_CPU */
#else /* !CONFIG_SMP */
#define profile_flip_buffers() do { } while (0)
#define profile_discard_flip_buffers() do { } while (0)
#define profile_cpu_callback NULL
void profile_hits(int type, void *__pc, unsigned int nr_hits)
{