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s390/uv: fix prot virt host indication compilation 

prot_virt_host is only available if CONFIG_KVM is enabled. So lets use
a variable initialized to zero and overwrite it when that config
option is set with prot_virt_host.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Fixes: 37564ed834 ("s390/uv: add prot virt guest/host indication files")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
This commit is contained in:
Janosch Frank 2021-03-23 10:09:50 +00:00 committed by Heiko Carstens
parent 5671d9718f
commit df2e400e07
1 changed files with 7 additions and 1 deletions
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8
arch/s390/kernel/uv.c
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@ -420,7 +420,13 @@ static ssize_t uv_is_prot_virt_guest(struct kobject *kobj,
static ssize_t uv_is_prot_virt_host(struct kobject *kobj,
struct kobj_attribute *attr, char *page)
{
return scnprintf(page, PAGE_SIZE, "%d\n", prot_virt_host);
int val = 0;
#if IS_ENABLED(CONFIG_KVM)
val = prot_virt_host;
#endif
return scnprintf(page, PAGE_SIZE, "%d\n", val);
}
static struct kobj_attribute uv_prot_virt_guest =