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| author |   Alexander Egorenkov <egorenar@linux.ibm.com> | 2021-11-11 12:33:59 +0100 |
|---|---|---|
| committer |   Heiko Carstens <hca@linux.ibm.com> | 2021-12-16 19:58:07 +0100 |
| commit | cb22cd2d8ff3201f04f167efa86cc561dccffffe (patch) | |
| tree | ac5020ac6b70eccd3a094d26bd7933b1ae2edd1d /arch/s390 | |
| parent | s390/nmi: disable interrupts on extended save area update (diff) | |
| download | linux-dev-cb22cd2d8ff3201f04f167efa86cc561dccffffe.tar.xz linux-dev-cb22cd2d8ff3201f04f167efa86cc561dccffffe.zip | |
s390/sclp: release SCLP early buffer after kernel initialization
The SCLP early buffer is used only during kernel initialization and can be
freed afterwards. The only way to ensure that it is not released while
being in use, is to release it in free_initmem().
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Reviewed-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Alexander Egorenkov <egorenar@linux.ibm.com>
[agordeev@linux.ibm.com: added debug output]
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/mm/init.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c index 8c6f258a6183..86ffd0d51fd5 100644 --- a/arch/s390/mm/init.c +++ b/arch/s390/mm/init.c @@ -215,6 +215,9 @@ void free_initmem(void) __set_memory((unsigned long)_sinittext, (unsigned long)(_einittext - _sinittext) >> PAGE_SHIFT, SET_MEMORY_RW | SET_MEMORY_NX); + free_reserved_area(sclp_early_sccb, + sclp_early_sccb + EXT_SCCB_READ_SCP, + POISON_FREE_INITMEM, "unused early sccb"); free_initmem_default(POISON_FREE_INITMEM); } |