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Diffstat (limited to 'arch/s390/kernel/kprobes.c')
-rw-r--r--arch/s390/kernel/kprobes.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/arch/s390/kernel/kprobes.c b/arch/s390/kernel/kprobes.c
index 569079ec4ff0..a01cf0284db2 100644
--- a/arch/s390/kernel/kprobes.c
+++ b/arch/s390/kernel/kprobes.c
@@ -218,9 +218,10 @@ 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, 0);
- mutex_unlock(&kprobe_mutex);
+ if (p->ainsn.insn) {
+ free_insn_slot(p->ainsn.insn, 0);
+ p->ainsn.insn = NULL;
+ }
}
static void __kprobes prepare_singlestep(struct kprobe *p, struct pt_regs *regs)
@@ -381,7 +382,7 @@ static int __kprobes trampoline_probe_handler(struct kprobe *p,
/*
* It is possible to have multiple instances associated with a given
* task either because an multiple functions in the call path
- * have a return probe installed on them, and/or more then one return
+ * have a return probe installed on them, and/or more than one return
* return probe was registered for a target function.
*
* We can handle this because: