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s390/protvirt: support ultravisor without secure storage limit

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Avoid potential crash due to lack of secure storage limit. Check that
max_sec_stor_addr is not 0 before adjusting vmalloc position.

Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Vasily Gorbik 2020-09-11 11:40:21 +02:00
parent 1d6671ae46
commit c2314cb2dd
1 changed files with 2 additions and 1 deletions
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3
arch/s390/kernel/uv.c
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@ -90,7 +90,8 @@ void __init setup_uv(void)
void adjust_to_uv_max(unsigned long *vmax)
{
*vmax = min_t(unsigned long, *vmax, uv_info.max_sec_stor_addr);
if (uv_info.max_sec_stor_addr)
*vmax = min_t(unsigned long, *vmax, uv_info.max_sec_stor_addr);
}
/*