Commit 5075baca authored by Heiko Carstens's avatar Heiko Carstens Committed by Martin Schwidefsky

[S390] add __ucmpdi2() helper function

Provide __ucmpdi2() helper function on 31 bit so we don't run
again and again in compile errors like this one:

kernel/built-in.o: In function `T.689':
perf_counter.c:(.text+0x56c86): undefined reference to `__ucmpdi2'
Signed-off-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 2651fa2b
...@@ -3,6 +3,6 @@ ...@@ -3,6 +3,6 @@
# #
lib-y += delay.o string.o uaccess_std.o uaccess_pt.o lib-y += delay.o string.o uaccess_std.o uaccess_pt.o
obj-$(CONFIG_32BIT) += div64.o qrnnd.o obj-$(CONFIG_32BIT) += div64.o qrnnd.o ucmpdi2.o
lib-$(CONFIG_64BIT) += uaccess_mvcos.o lib-$(CONFIG_64BIT) += uaccess_mvcos.o
lib-$(CONFIG_SMP) += spinlock.o lib-$(CONFIG_SMP) += spinlock.o
#include <linux/module.h>
union ull_union {
unsigned long long ull;
struct {
unsigned int high;
unsigned int low;
} ui;
};
int __ucmpdi2(unsigned long long a, unsigned long long b)
{
union ull_union au = {.ull = a};
union ull_union bu = {.ull = b};
if (au.ui.high < bu.ui.high)
return 0;
else if (au.ui.high > bu.ui.high)
return 2;
if (au.ui.low < bu.ui.low)
return 0;
else if (au.ui.low > bu.ui.low)
return 2;
return 1;
}
EXPORT_SYMBOL(__ucmpdi2);
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