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powerpc/idle/6xx: Use r1 with CURRENT_THREAD_INFO() 

Make sure CURRENT_THREAD_INFO() is used with r1 which is the virtual
address of the stack, in order to ease the switch to r2 when we enable
THREAD_INFO_IN_TASK, as we have no register having the phys address of
current.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
[mpe: Split out of larger patch]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Christophe Leroy 2019-02-04 22:16:48 +11:00 committed by Michael Ellerman
parent b72cc2e7ae
commit 7aef376679
1 changed files with 2 additions and 1 deletions
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3
arch/powerpc/kernel/idle_6xx.S
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@ -159,7 +159,8 @@ _GLOBAL(power_save_ppc32_restore)
stw r9,_NIP(r11) /* make it do a blr */
#ifdef CONFIG_SMP
CURRENT_THREAD_INFO(r12, r11)
CURRENT_THREAD_INFO(r12, r1)
tophys(r12, r12)
lwz r11,TI_CPU(r12) /* get cpu number * 4 */
slwi r11,r11,2
#else