From: Hien Nguyen <hien@us.ibm.com>
Date: Thu, 23 Jun 2005 07:09:26 +0000 (-0700)
Subject: [PATCH] kprobes: moves lock-unlock to non-arch kprobe_flush_task
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=0aa55e4d7db822059fe8132fe9f2b7773c48216c;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

[PATCH] kprobes: moves lock-unlock to non-arch kprobe_flush_task

This patch moves the lock/unlock of the arch specific kprobe_flush_task()
to the non-arch specific kprobe_flusk_task().

Signed-off-by: Hien Nguyen <hien@us.ibm.com>
Acked-by: Prasanna S Panchamukhi <prasanna@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/arch/i386/kernel/kprobes.c b/arch/i386/kernel/kprobes.c
index 2314d8d306fd..b8e2bae0ab4f 100644
--- a/arch/i386/kernel/kprobes.c
+++ b/arch/i386/kernel/kprobes.c
@@ -138,17 +138,14 @@ void arch_prepare_kretprobe(struct kretprobe *rp, struct pt_regs *regs)
 	}
 }
 
-void arch_kprobe_flush_task(struct task_struct *tk, spinlock_t *kp_lock)
+void arch_kprobe_flush_task(struct task_struct *tk)
 {
-	unsigned long flags = 0;
 	struct kretprobe_instance *ri;
-	spin_lock_irqsave(kp_lock, flags);
 	while ((ri = get_rp_inst_tsk(tk)) != NULL) {
 		*((unsigned long *)(ri->stack_addr)) =
 					(unsigned long) ri->ret_addr;
 		recycle_rp_inst(ri);
 	}
-	spin_unlock_irqrestore(kp_lock, flags);
 }
 
 /*
diff --git a/include/linux/kprobes.h b/include/linux/kprobes.h
index 0f90466fb8b0..461391decc46 100644
--- a/include/linux/kprobes.h
+++ b/include/linux/kprobes.h
@@ -33,7 +33,6 @@
 #include <linux/list.h>
 #include <linux/notifier.h>
 #include <linux/smp.h>
-#include <linux/spinlock.h>
 
 #include <asm/kprobes.h>
 
@@ -101,7 +100,7 @@ extern void trampoline_post_handler(struct kprobe *p, struct pt_regs *regs,
 							unsigned long flags);
 extern struct task_struct *arch_get_kprobe_task(void *ptr);
 extern void arch_prepare_kretprobe(struct kretprobe *rp, struct pt_regs *regs);
-extern void arch_kprobe_flush_task(struct task_struct *tk, spinlock_t *kp_lock);
+extern void arch_kprobe_flush_task(struct task_struct *tk);
 #else /* ARCH_SUPPORTS_KRETPROBES */
 static inline void kretprobe_trampoline(void)
 {
diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index e8e0ae8a6e14..dd42e717dd35 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -229,7 +229,10 @@ struct kretprobe_instance *get_rp_inst_tsk(struct task_struct *tk)
  */
 void kprobe_flush_task(struct task_struct *tk)
 {
-	arch_kprobe_flush_task(tk, &kprobe_lock);
+	unsigned long flags = 0;
+	spin_lock_irqsave(&kprobe_lock, flags);
+	arch_kprobe_flush_task(tk);
+	spin_unlock_irqrestore(&kprobe_lock, flags);
 }
 
 /*