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| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2019-01-17 11:20:28 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2019-01-28 15:43:17 +0100 |
| commit | 634692ab7007e8e3fec758ab0b26e65abf7c79e0 (patch) | |
| tree | c8bd0c65d31760b611adf412c7923c7f63f3b5ad | |
| parent | f17b5f06cb92ef2250513a1e154c47b78df07d40 (diff) | |
| download | linux-634692ab7007e8e3fec758ab0b26e65abf7c79e0.tar.bz2 | |
s390/suspend: fix stack setup in swsusp_arch_suspend
The patch that added support for the virtually mapped kernel stacks changed
swsusp_arch_suspend to switch to the nodat-stack as the vmap stack is not
available while going in and out of suspend.
Unfortunately the switch to the nodat-stack is incorrect which breaks
suspend to disk.
Cc: stable@vger.kernel.org # v4.20
Fixes: ce3dc447493f ("s390: add support for virtually mapped kernel stacks")
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| -rw-r--r-- | arch/s390/kernel/swsusp.S | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/s390/kernel/swsusp.S b/arch/s390/kernel/swsusp.S index 537f97fde37f..b6796e616812 100644 --- a/arch/s390/kernel/swsusp.S +++ b/arch/s390/kernel/swsusp.S @@ -30,10 +30,10 @@ .section .text ENTRY(swsusp_arch_suspend) lg %r1,__LC_NODAT_STACK - aghi %r1,-STACK_FRAME_OVERHEAD stmg %r6,%r15,__SF_GPRS(%r1) + aghi %r1,-STACK_FRAME_OVERHEAD stg %r15,__SF_BACKCHAIN(%r1) - lgr %r1,%r15 + lgr %r15,%r1 /* Store FPU registers */ brasl %r14,save_fpu_regs |