[PATCH 7/8] powerpc/64s/interrupt: clean up interrupt return labels

[Nicholas Piggin <npiggin@gmail.com>]

Normal kernel-interrupt exits can get interrupt_return_srr_user_restart
in their backtrace, which is an unusual and notable function, and it is
part of the user-interrupt exit path, which is doubly confusing.

Add symmetric non-local labels for user and kernel interrupt exit cases
to address this. Also get rid of an unused label.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
 arch/powerpc/kernel/interrupt_64.S | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/arch/powerpc/kernel/interrupt_64.S b/arch/powerpc/kernel/interrupt_64.S
index 06244b4df719..795c105850e4 100644
--- a/arch/powerpc/kernel/interrupt_64.S
+++ b/arch/powerpc/kernel/interrupt_64.S
@@ -511,7 +511,9 @@ interrupt_return_\srr\():
 _ASM_NOKPROBE_SYMBOL(interrupt_return_\srr\())
 	ld	r4,_MSR(r1)
 	andi.	r0,r4,MSR_PR
-	beq	.Lkernel_interrupt_return_\srr
+	beq	interrupt_return_\srr\()_kernel
+interrupt_return_\srr\()_user: /* make backtraces match the _kernel variant */
+_ASM_NOKPROBE_SYMBOL(interrupt_return_\srr\()_user)
 	addi	r3,r1,STACK_FRAME_OVERHEAD
 	bl	interrupt_exit_user_prepare
 	cmpdi	r3,0
@@ -625,8 +627,8 @@ RESTART_TABLE(.Linterrupt_return_\srr\()_user_rst_start, .Linterrupt_return_\srr
 #endif
 
 	.balign IFETCH_ALIGN_BYTES
-.Lkernel_interrupt_return_\srr\():
-.Linterrupt_return_\srr\()_kernel:
+interrupt_return_\srr\()_kernel:
+_ASM_NOKPROBE_SYMBOL(interrupt_return_\srr\()_kernel)
 	addi	r3,r1,STACK_FRAME_OVERHEAD
 	bl	interrupt_exit_kernel_prepare
 
-- 
2.23.0