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path: root/drivers/s390/char/sclp_cmd.c
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Diffstat (limited to 'drivers/s390/char/sclp_cmd.c')
-rw-r--r--drivers/s390/char/sclp_cmd.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/s390/char/sclp_cmd.c b/drivers/s390/char/sclp_cmd.c
index b3beab610da4..4b60ede07f0e 100644
--- a/drivers/s390/char/sclp_cmd.c
+++ b/drivers/s390/char/sclp_cmd.c
@@ -308,6 +308,13 @@ struct assign_storage_sccb {
u16 rn;
} __packed;
+int arch_get_memory_phys_device(unsigned long start_pfn)
+{
+ if (!rzm)
+ return 0;
+ return PFN_PHYS(start_pfn) >> ilog2(rzm);
+}
+
static unsigned long long rn2addr(u16 rn)
{
return (unsigned long long) (rn - 1) * rzm;