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Kprobes: indicate kretprobe support in Kconfig

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Add CONFIG_HAVE_KRETPROBES to the arch/<arch>/Kconfig file for relevant
architectures with kprobes support.  This facilitates easy handling of
in-kernel modules (like samples/kprobes/kretprobe_example.c) that depend on
kretprobes being present in the kernel.

Thanks to Sam Ravnborg for helping make the patch more lean.

Per Mathieu's suggestion, added CONFIG_KRETPROBES and fixed up dependencies.

Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Acked-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Ananth N Mavinakayanahalli 2008-03-04 14:28:37 -08:00 • committed by Linus Torvalds
parent 8182ec49a7
commit 9edddaa200
15 changed files with 19 additions and 16 deletions
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9
kernel/kprobes.c
View file

@ -678,8 +678,7 @@ void __kprobes unregister_jprobe(struct jprobe *jp)
unregister_kprobe(&jp->kp);
}
#ifdef ARCH_SUPPORTS_KRETPROBES
#ifdef CONFIG_KRETPROBES
/*
* This kprobe pre_handler is registered with every kretprobe. When probe
* hits it will set up the return probe.
@ -769,8 +768,7 @@ int __kprobes register_kretprobe(struct kretprobe *rp)
return ret;
}
#else /* ARCH_SUPPORTS_KRETPROBES */
#else /* CONFIG_KRETPROBES */
int __kprobes register_kretprobe(struct kretprobe *rp)
{
return -ENOSYS;
@ -781,8 +779,7 @@ static int __kprobes pre_handler_kretprobe(struct kprobe *p,
{
return 0;
}
#endif /* ARCH_SUPPORTS_KRETPROBES */
#endif /* CONFIG_KRETPROBES */
void __kprobes unregister_kretprobe(struct kretprobe *rp)
{