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| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2019-03-01 15:28:09 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2019-03-01 16:23:27 +0100 |
| commit | c8e8ed386a5191d8011d32b5663da10320e7d552 (patch) | |
| tree | a694a18a69c87c2c826a6171cd75b0b2cd766602 | |
| parent | 6d85dac2ab9292956b5864daee8e11c4e158a566 (diff) | |
| download | lwn-c8e8ed386a5191d8011d32b5663da10320e7d552.tar.gz lwn-c8e8ed386a5191d8011d32b5663da10320e7d552.zip | |
s390/suspend: fix prefix register reset in swsusp_arch_resume
The reset of the prefix to zero in swsusp_arch_resume uses a 4 byte stack
slot. With CONFIG_VMAP_STACK=y this is now in the vmalloc area, this works
only with DAT enabled. Move the DAT disable in swsusp_arch_resume after
the prefix reset.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| -rw-r--r-- | arch/s390/kernel/swsusp.S | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/s390/kernel/swsusp.S b/arch/s390/kernel/swsusp.S index 537f97fde37f..2f997eb70e18 100644 --- a/arch/s390/kernel/swsusp.S +++ b/arch/s390/kernel/swsusp.S @@ -124,13 +124,13 @@ ENTRY(swsusp_arch_resume) lghi %r2,1 brasl %r14,arch_set_page_states - /* Deactivate DAT */ - stnsm __SF_EMPTY(%r15),0xfb - /* Set prefix page to zero */ xc __SF_EMPTY(4,%r15),__SF_EMPTY(%r15) spx __SF_EMPTY(%r15) + /* Deactivate DAT */ + stnsm __SF_EMPTY(%r15),0xfb + /* Restore saved image */ larl %r1,restore_pblist lg %r1,0(%r1) |