From 5075baca2e95840d76210c3cfda56134007462c9 Mon Sep 17 00:00:00 2001 From: Heiko Carstens Date: Tue, 7 Jul 2009 16:37:09 +0200 Subject: [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: Heiko Carstens Signed-off-by: Martin Schwidefsky --- arch/s390/lib/ucmpdi2.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) create mode 100644 arch/s390/lib/ucmpdi2.c (limited to 'arch/s390/lib/ucmpdi2.c') diff --git a/arch/s390/lib/ucmpdi2.c b/arch/s390/lib/ucmpdi2.c new file mode 100644 index 00000000000..3e05ff53258 --- /dev/null +++ b/arch/s390/lib/ucmpdi2.c @@ -0,0 +1,26 @@ +#include + +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); -- cgit v1.2.3