[PATCH] sem2mutex: kprobes

Semaphore to mutex conversion.

The conversion was generated via scripts, and the result was validated
automatically via a script as well.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/i386/kernel/kprobes.c

@@ -84,9 +84,9 @@ void __kprobes arch_disarm_kprobe(struct kprobe *p)
 
 void __kprobes arch_remove_kprobe(struct kprobe *p)
 {
-	down(&kprobe_mutex);
+	mutex_lock(&kprobe_mutex);
 	free_insn_slot(p->ainsn.insn);
-	up(&kprobe_mutex);
+	mutex_unlock(&kprobe_mutex);
 }
 
 static inline void save_previous_kprobe(struct kprobe_ctlblk *kcb)

arch/powerpc/kernel/kprobes.c

@@ -81,9 +81,9 @@ void __kprobes arch_disarm_kprobe(struct kprobe *p)
 
 void __kprobes arch_remove_kprobe(struct kprobe *p)
 {
-	down(&kprobe_mutex);
+	mutex_lock(&kprobe_mutex);
 	free_insn_slot(p->ainsn.insn);
-	up(&kprobe_mutex);
+	mutex_unlock(&kprobe_mutex);
 }
 
 static inline void prepare_singlestep(struct kprobe *p, struct pt_regs *regs)

arch/x86_64/kernel/kprobes.c

@@ -222,9 +222,9 @@ void __kprobes arch_disarm_kprobe(struct kprobe *p)
 
 void __kprobes arch_remove_kprobe(struct kprobe *p)
 {
-	down(&kprobe_mutex);
+	mutex_lock(&kprobe_mutex);
 	free_insn_slot(p->ainsn.insn);
-	up(&kprobe_mutex);
+	mutex_unlock(&kprobe_mutex);
 }
 
 static inline void save_previous_kprobe(struct kprobe_ctlblk *kcb)

include/linux/kprobes.h

@@ -36,6 +36,7 @@
 #include <linux/percpu.h>
 #include <linux/spinlock.h>
 #include <linux/rcupdate.h>
+#include <linux/mutex.h>
 
 #ifdef CONFIG_KPROBES
 #include <asm/kprobes.h>
@@ -152,7 +153,7 @@ struct kretprobe_instance {
 };
 
 extern spinlock_t kretprobe_lock;
-extern struct semaphore kprobe_mutex;
+extern struct mutex kprobe_mutex;
 extern int arch_prepare_kprobe(struct kprobe *p);
 extern void arch_arm_kprobe(struct kprobe *p);
 extern void arch_disarm_kprobe(struct kprobe *p);

kernel/kprobes.c

@@ -48,7 +48,7 @@
 static struct hlist_head kprobe_table[KPROBE_TABLE_SIZE];
 static struct hlist_head kretprobe_inst_table[KPROBE_TABLE_SIZE];
 
-DECLARE_MUTEX(kprobe_mutex);		/* Protects kprobe_table */
+DEFINE_MUTEX(kprobe_mutex);		/* Protects kprobe_table */
 DEFINE_SPINLOCK(kretprobe_lock);	/* Protects kretprobe_inst_table */
 static DEFINE_PER_CPU(struct kprobe *, kprobe_instance) = NULL;
 
@@ -460,7 +460,7 @@ static int __kprobes __register_kprobe(struct kprobe *p,
 	}
 
 	p->nmissed = 0;
-	down(&kprobe_mutex);
+	mutex_lock(&kprobe_mutex);
 	old_p = get_kprobe(p->addr);
 	if (old_p) {
 		ret = register_aggr_kprobe(old_p, p);
@@ -477,7 +477,7 @@ static int __kprobes __register_kprobe(struct kprobe *p,
   	arch_arm_kprobe(p);
 
 out:
-	up(&kprobe_mutex);
+	mutex_unlock(&kprobe_mutex);
 
 	if (ret && probed_mod)
 		module_put(probed_mod);
@@ -496,10 +496,10 @@ void __kprobes unregister_kprobe(struct kprobe *p)
 	struct kprobe *old_p, *list_p;
 	int cleanup_p;
 
-	down(&kprobe_mutex);
+	mutex_lock(&kprobe_mutex);
 	old_p = get_kprobe(p->addr);
 	if (unlikely(!old_p)) {
-		up(&kprobe_mutex);
+		mutex_unlock(&kprobe_mutex);
 		return;
 	}
 	if (p != old_p) {
@@ -507,7 +507,7 @@ void __kprobes unregister_kprobe(struct kprobe *p)
 			if (list_p == p)
 			/* kprobe p is a valid probe */
 				goto valid_p;
-		up(&kprobe_mutex);
+		mutex_unlock(&kprobe_mutex);
 		return;
 	}
 valid_p:
@@ -523,7 +523,7 @@ void __kprobes unregister_kprobe(struct kprobe *p)
 		cleanup_p = 0;
 	}
 
-	up(&kprobe_mutex);
+	mutex_unlock(&kprobe_mutex);
 
 	synchronize_sched();
 	if (p->mod_refcounted &&