1 files changed, 6 insertions, 12 deletions

diff --git a/arch/powerpc/kernel/kprobes.c b/arch/powerpc/kernel/kprobes.c
index 3fd1af902112..bc47352deb1f 100644
--- a/arch/powerpc/kernel/kprobes.c
+++ b/arch/powerpc/kernel/kprobes.c
@@ -31,6 +31,7 @@
 #include <linux/preempt.h>
 #include <linux/module.h>
 #include <linux/kdebug.h>
+#include <linux/slab.h>
 #include <asm/cacheflush.h>
 #include <asm/sstep.h>
 #include <asm/uaccess.h>
@@ -113,6 +114,9 @@ static void __kprobes prepare_singlestep(struct kprobe *p, struct pt_regs *regs)
 #ifdef CONFIG_PPC_ADV_DEBUG_REGS
         regs->msr &= ~MSR_CE;
         mtspr(SPRN_DBCR0, mfspr(SPRN_DBCR0) | DBCR0_IC | DBCR0_IDM);
+#ifdef CONFIG_PPC_47x
+        isync();
+#endif
 #endif
 
         /*
@@ -374,17 +378,6 @@ static int __kprobes trampoline_probe_handler(struct kprobe *p,
  * single-stepped a copy of the instruction.  The address of this
  * copy is p->ainsn.insn.
  */
-static void __kprobes resume_execution(struct kprobe *p, struct pt_regs *regs)
-{
-        int ret;
-        unsigned int insn = *p->ainsn.insn;
-
-        regs->nip = (unsigned long)p->addr;
-        ret = emulate_step(regs, insn);
-        if (ret == 0)
-                regs->nip = (unsigned long)p->addr + 4;
-}
-
 static int __kprobes post_kprobe_handler(struct pt_regs *regs)
 {
         struct kprobe *cur = kprobe_running();
@@ -402,7 +395,8 @@ static int __kprobes post_kprobe_handler(struct pt_regs *regs)
                 cur->post_handler(cur, regs, 0);
         }
 
-        resume_execution(cur, regs);
+        /* Adjust nip to after the single-stepped instruction */
+        regs->nip = (unsigned long)cur->addr + 4;
         regs->msr |= kcb->kprobe_saved_msr;
 
         /*Restore back the original saved kprobes variables and continue. */