Re: [PATCH AUTOSEL 6.1 18/38] powerpc/kvm: Fix unannotated intra-function call warning

From: Sathvika Vasireddy <redacted>

[ Upstream commit fe6de81b610e5d0b9d2231acff2de74a35482e7d ]

objtool throws the following warning:
   arch/powerpc/kvm/booke.o: warning: objtool: kvmppc_fill_pt_regs+0x30:
   unannotated intra-function call

Fix the warning by setting the value of 'nip' using the _THIS_IP_ macro,
without using an assembly bl/mflr sequence to save the instruction
pointer.

Reported-by: kernel test robot <redacted>
Suggested-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Sathvika Vasireddy <redacted>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20230128124158.1066251-1-sv@linux.ibm.com (local)
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
  arch/powerpc/kvm/booke.c | 5 ++---
  1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c
index 7b4920e9fd263..3852209989f04 100644
--- a/arch/powerpc/kvm/booke.c
+++ b/arch/powerpc/kvm/booke.c

@@ -912,16 +912,15 @@ static int kvmppc_handle_debug(struct kvm_vcpu *vcpu)
  
  static void kvmppc_fill_pt_regs(struct pt_regs *regs)
  {
-	ulong r1, ip, msr, lr;
+	ulong r1, msr, lr;
  
  	asm("mr %0, 1" : "=r"(r1));
  	asm("mflr %0" : "=r"(lr));
  	asm("mfmsr %0" : "=r"(msr));
-	asm("bl 1f; 1: mflr %0" : "=r"(ip));
  
  	memset(regs, 0, sizeof(*regs));
  	regs->gpr[1] = r1;
-	regs->nip = ip;
+	regs->nip = _THIS_IP_;
  	regs->msr = msr;
  	regs->link = lr;
  }