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powerpc: Remove SYNC on non 6xx

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SYNC is usefull for Powerpc 601 only. On everything else,
SYNC is empty.

Remove it from code that is not made to run on 6xx.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/27951fa6c9a8f80724d1bc81a6117ac32343a55d.1601362098.git.christophe.leroy@csgroup.eu
This commit is contained in:
Christophe Leroy 2020-09-29 06:48:31 +00:00 committed by Michael Ellerman
parent 13135b461c
commit ca1d3443b4
3 changed files with 0 additions and 3 deletions
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1
arch/powerpc/kernel/head_40x.S
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@ -72,7 +72,6 @@ turn_on_mmu:
lis r0,start_here@h
ori r0,r0,start_here@l
mtspr SPRN_SRR0,r0
SYNC
rfi /* enables MMU */
b . /* prevent prefetch past rfi */

1
arch/powerpc/kernel/head_booke.h
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@ -176,7 +176,6 @@ ALT_FTR_SECTION_END_IFSET(CPU_FTR_EMB_HV)
#endif
mtspr SPRN_SRR1,r10
mtspr SPRN_SRR0,r11
SYNC
RFI /* jump to handler, enable MMU */
99: b ret_from_kernel_syscall
.endm

1
arch/powerpc/kernel/misc_64.S
View File

@ -365,7 +365,6 @@ _GLOBAL(kexec_smp_wait)
li r4,KEXEC_STATE_REAL_MODE
stb r4,PACAKEXECSTATE(r13)
SYNC
b kexec_wait