diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index f69de08ad347..15a3c3fd8e70 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -217,8 +217,12 @@ static __always_inline void call_do_softirq(const void *sp)
 		   [sp] "b" (sp), [offset] "i" (THREAD_SIZE - STACK_FRAME_MIN_SIZE),
 		   [callee] "i" (__do_softirq)
 		 : // Clobbers
-		   "lr", "xer", "ctr", "memory", "cr0", "cr1", "cr5", "cr6",
-		   "cr7", "r0", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10",
+		   "lr", "xer", "ctr", "memory", "cr0", "cr1", "cr5", "cr6", "cr7", "r0",
+		  /* r2 may be clobbered by the callee when using PCREL mode in the ELFv2 ABI. */
+#ifdef CONFIG_PPC_KERNEL_PCREL
+		   "r2",
+#endif
+		   "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10",
 		   "r11", "r12"
 	);
 }
@@ -275,8 +279,12 @@ static __always_inline void call_do_irq(struct pt_regs *regs, void *sp)
 		   [sp] "b" (sp), [offset] "i" (THREAD_SIZE - STACK_FRAME_MIN_SIZE),
 		   [callee] "i" (__do_irq)
 		 : // Clobbers
-		   "lr", "xer", "ctr", "memory", "cr0", "cr1", "cr5", "cr6",
-		   "cr7", "r0", "r4", "r5", "r6", "r7", "r8", "r9", "r10",
+		   "lr", "xer", "ctr", "memory", "cr0", "cr1", "cr5", "cr6", "cr7", "r0",
+		  /* r2 may be clobbered by the callee when using PCREL mode in the ELFv2 ABI. */
+#ifdef CONFIG_PPC_KERNEL_PCREL
+		   "r2",
+#endif
+		   "r4", "r5", "r6", "r7", "r8", "r9", "r10",
 		   "r11", "r12"
 	);
 }