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

arch/s390/lib/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -3,6 +3,6 @@ 
#



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_SMP) += spinlock.o

arch/s390/lib/ucmpdi2.c

0 → 100644
+26 −0
Original line number Diff line number Diff line 
#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);