This is a note to let you know that I've just added the patch titled
MIPS: Hibernate: flush TLB entries earlier
to the 3.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mips-hibernate-flush-tlb-entries-earlier.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From a843d00d038b11267279e3b5388222320f9ddc1d Mon Sep 17 00:00:00 2001
From: Huacai Chen <chenhc@xxxxxxxxxx>
Date: Sun, 29 Mar 2015 10:54:05 +0800
Subject: MIPS: Hibernate: flush TLB entries earlier
From: Huacai Chen <chenhc@xxxxxxxxxx>
commit a843d00d038b11267279e3b5388222320f9ddc1d upstream.
We found that TLB mismatch not only happens after kernel resume, but
also happens during snapshot restore. So move it to the beginning of
swsusp_arch_suspend().
Signed-off-by: Huacai Chen <chenhc@xxxxxxxxxx>
Cc: Steven J. Hill <Steven.Hill@xxxxxxxxxx>
Cc: linux-mips@xxxxxxxxxxxxxx
Cc: Fuxin Zhang <zhangfx@xxxxxxxxxx>
Cc: Zhangjin Wu <wuzhangjin@xxxxxxxxx>
Patchwork: https://patchwork.linux-mips.org/patch/9621/
Signed-off-by: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/mips/power/hibernate.S | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/arch/mips/power/hibernate.S
+++ b/arch/mips/power/hibernate.S
@@ -30,6 +30,8 @@ LEAF(swsusp_arch_suspend)
END(swsusp_arch_suspend)
LEAF(swsusp_arch_resume)
+ /* Avoid TLB mismatch during and after kernel resume */
+ jal local_flush_tlb_all
PTR_L t0, restore_pblist
0:
PTR_L t1, PBE_ADDRESS(t0) /* source */
@@ -43,7 +45,6 @@ LEAF(swsusp_arch_resume)
bne t1, t3, 1b
PTR_L t0, PBE_NEXT(t0)
bnez t0, 0b
- jal local_flush_tlb_all /* Avoid TLB mismatch after kernel resume */
PTR_LA t0, saved_regs
PTR_L ra, PT_R31(t0)
PTR_L sp, PT_R29(t0)
Patches currently in stable-queue which might be from chenhc@xxxxxxxxxx are
queue-3.14/mips-hibernate-flush-tlb-entries-earlier.patch
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