1 files changed, 7 insertions, 0 deletions

diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index 588c0cb8115e..15998b57767c 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -613,6 +613,13 @@ void start_thread(struct pt_regs *regs, unsigned long start, unsigned long sp)
         regs->ccr = 0;
         regs->gpr[1] = sp;
 
+        /*
+         * We have just cleared all the nonvolatile GPRs, so make
+         * FULL_REGS(regs) return true.  This is necessary to allow
+         * ptrace to examine the thread immediately after exec.
+         */
+        regs->trap &= ~1UL;
+
 #ifdef CONFIG_PPC32
         regs->mq = 0;
         regs->nip = start;