* [PATCH 3.14 15/92] MIPS: Hibernate: flush TLB entries earlier
[not found] <20150502190109.683061482@linuxfoundation.org>
@ 2015-05-02 19:02 ` Greg Kroah-Hartman
0 siblings, 0 replies; only message in thread
From: Greg Kroah-Hartman @ 2015-05-02 19:02 UTC (permalink / raw)
To: linux-kernel
Cc: Greg Kroah-Hartman, stable, Huacai Chen, Steven J. Hill,
linux-mips, Fuxin Zhang, Zhangjin Wu, Ralf Baechle
3.14-stable review patch. If anyone has any objections, please let me know.
------------------
From: Huacai Chen <chenhc@lemote.com>
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@lemote.com>
Cc: Steven J. Hill <Steven.Hill@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: Fuxin Zhang <zhangfx@lemote.com>
Cc: Zhangjin Wu <wuzhangjin@gmail.com>
Patchwork: https://patchwork.linux-mips.org/patch/9621/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
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)
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