lkml.org 
[lkml]   [2020]   [Sep]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v2 1/7] powerpc: Remove SYNC on non 6xx
Date
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>
---
arch/powerpc/kernel/head_40x.S | 1 -
arch/powerpc/kernel/head_booke.h | 1 -
arch/powerpc/kernel/misc_64.S | 1 -
3 files changed, 3 deletions(-)

diff --git a/arch/powerpc/kernel/head_40x.S b/arch/powerpc/kernel/head_40x.S
index 5b282d9965a5..44c9018aed1b 100644
--- 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 18f87bf9e32b..71c359d438b5 100644
--- 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 7bb46ad98207..070465825c21 100644
--- 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

--
2.25.0
\
 
 \ /
  Last update: 2020-09-29 08:10    [W:0.077 / U:9.556 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site