powerpc: Remove SYNC on non 6xx

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

diff --git a/arch/powerpc/kernel/head_40x.S b/arch/powerpc/kernel/head_40x.S
index 5b282d9965a56822e7ea785fc1bb9017bd6d5dea..44c9018aed1b08bb380a0f980c1c5f3675c420f3 100644 (file)
--- a/arch/powerpc/kernel/head_40x.S
+++ b/arch/powerpc/kernel/head_40x.S
@@ -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 */
 

diff --git a/arch/powerpc/kernel/head_booke.h b/arch/powerpc/kernel/head_booke.h
index 18f87bf9e32b065bb84ae0c9fdfee0ea2e6df2a1..71c359d438b52de65de17044c7f76667c81b42d8 100644 (file)
--- a/arch/powerpc/kernel/head_booke.h
+++ b/arch/powerpc/kernel/head_booke.h
@@ -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

diff --git a/arch/powerpc/kernel/misc_64.S b/arch/powerpc/kernel/misc_64.S
index 7bb46ad9820725f69e2e3be9877c2ab776ad534e..070465825c2102b49005a455a99b663369fcaaa6 100644 (file)
--- a/arch/powerpc/kernel/misc_64.S
+++ b/arch/powerpc/kernel/misc_64.S
@@ -365,7 +365,6 @@ _GLOBAL(kexec_smp_wait)
 
        li      r4,KEXEC_STATE_REAL_MODE
        stb     r4,PACAKEXECSTATE(r13)
-       SYNC
 
        b       kexec_wait