Re: [PATCH] powerpc/32s: fix initial setup of segment registers on secondary CPU

From: Christophe Leroy
Date: Tue Jun 11 2019 - 12:51:29 EST




Le 11/06/2019 Ã 17:47, Christophe Leroy a ÃcritÂ:
The patch referenced below moved the loading of segment registers
out of load_up_mmu() in order to do it earlier in the boot sequence.
However, the secondary CPU still needs it to be done when loading up
the MMU.

Reported-by: Erhard F. <erhard_f@xxxxxxxxxxx>
Fixes: 215b823707ce ("powerpc/32s: set up an early static hash table for KASAN")

Cc: stable@xxxxxxxxxxxxxxx

Signed-off-by: Christophe Leroy <christophe.leroy@xxxxxx>
---
arch/powerpc/kernel/head_32.S | 1 +
1 file changed, 1 insertion(+)

diff --git a/arch/powerpc/kernel/head_32.S b/arch/powerpc/kernel/head_32.S
index 1d5f1bd0dacd..f255e22184b4 100644
--- a/arch/powerpc/kernel/head_32.S
+++ b/arch/powerpc/kernel/head_32.S
@@ -752,6 +752,7 @@ __secondary_start:
stw r0,0(r3)
/* load up the MMU */
+ bl load_segment_registers
bl load_up_mmu
/* ptr to phys current thread */