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kprobes: add kprobe_insn_mutex and cleanup arch_remove_kprobe()

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Add kprobe_insn_mutex for protecting kprobe_insn_pages hlist, and remove
kprobe_mutex from architecture dependent code.

This allows us to call arch_remove_kprobe() (and free_insn_slot) while
holding kprobe_mutex.

Signed-off-by: Masami Hiramatsu <[email protected]>
Acked-by: Ananth N Mavinakayanahalli <[email protected]>
Cc: Anil S Keshavamurthy <[email protected]>
Cc: Russell King <[email protected]>
Cc: "Luck, Tony" <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Cc: Martin Schwidefsky <[email protected]>
Cc: Heiko Carstens <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Masami Hiramatsu 2009-01-06 14:41:50 -08:00 • committed by Linus Torvalds
commit 1294156078
7 changed files with 38 additions and 19 deletions
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8
arch/ia64/kernel/kprobes.c
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@ -670,9 +670,11 @@ void __kprobes arch_disarm_kprobe(struct kprobe *p)
void __kprobes arch_remove_kprobe(struct kprobe *p)
{
mutex_lock(&kprobe_mutex);
free_insn_slot(p->ainsn.insn, p->ainsn.inst_flag & INST_FLAG_BOOSTABLE);
mutex_unlock(&kprobe_mutex);
if (p->ainsn.insn) {
free_insn_slot(p->ainsn.insn,
p->ainsn.inst_flag & INST_FLAG_BOOSTABLE);
p->ainsn.insn = NULL;
}
}
/*
* We are resuming execution after a single step fault, so the pt_regs