[PATCH 2/3] powerpc: Make UP -> SMP kexec work again

[Michael Ellerman]

For UP to SMP kexec to work we need to jump into pSeries_secondary_smp_init
event on a UP + KEXEC kernel. The secondary cpus will not find their hw_cpu_id
in the paca and so they'll jump into kexec_wait, ready for a kexec.

Signed-off-by: Michael Ellerman <michael at ellerman.id.au>
---

 arch/powerpc/kernel/head_64.S |    4 +---
 1 files changed, 1 insertion(+), 3 deletions(-)

Index: to-merge/arch/powerpc/kernel/head_64.S
===================================================================
--- to-merge.orig/arch/powerpc/kernel/head_64.S
+++ to-merge/arch/powerpc/kernel/head_64.S
@@ -155,8 +155,7 @@ _GLOBAL(__secondary_hold)
 	SET_REG_IMMEDIATE(r4, .hmt_init)
 	mtctr	r4
 	bctr
-#else
-#ifdef CONFIG_SMP
+#elif defined(CONFIG_SMP) || defined(CONFIG_KEXEC)
 	LOAD_REG_IMMEDIATE(r4, .pSeries_secondary_smp_init)
 	mtctr	r4
 	mr	r3,r24
@@ -164,7 +163,6 @@ _GLOBAL(__secondary_hold)
 #else
 	BUG_OPCODE
 #endif
-#endif
 
 /* This value is used to mark exception frames on the stack. */
 	.section ".toc","aw"