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MIPS: Hibernate: flush TLB entries earlier 

commit a843d00d03 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>
This commit is contained in:
Huacai Chen 2015-03-29 10:54:05 +08:00 committed by Greg Kroah-Hartman
parent 89c9a4574a
commit dc47dff305
1 changed files with 2 additions and 1 deletions
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3
arch/mips/power/hibernate.S
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@ -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)