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authorJohn David Anglin <dave.anglin@bell.net>2013-04-20 19:41:06 +0000
committerHelge Deller <deller@gmx.de>2013-04-25 22:36:15 +0200
commitca0ad83da17b6ba07f9eb5902e69daac90c4fa61 (patch)
tree70f7a317a22e276721535f652624e2d6c6c3e4dd /arch/parisc/lib/ucmpdi2.c
parent0fbd06761f5c17cc9b20e02af60fd7ee9c895996 (diff)
parisc: Provide __ucmpdi2 to resolve undefined references in 32 bit builds.
The Debian experimental linux source package (3.8.5-1) build fails with the following errors: ... MODPOST 2016 modules ERROR: "__ucmpdi2" [fs/btrfs/btrfs.ko] undefined! ERROR: "__ucmpdi2" [drivers/md/dm-verity.ko] undefined! The attached patch resolves this problem. It is based on the s390 implementation of ucmpdi2.c. Signed-off-by: John David Anglin <dave.anglin@bell.net> Cc: "James E.J. Bottomley" <jejb@parisc-linux.org> Signed-off-by: Helge Deller <deller@gmx.de>
Diffstat (limited to 'arch/parisc/lib/ucmpdi2.c')
-rw-r--r--arch/parisc/lib/ucmpdi2.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/arch/parisc/lib/ucmpdi2.c b/arch/parisc/lib/ucmpdi2.c
new file mode 100644
index 000000000000..149c016f32c5
--- /dev/null
+++ b/arch/parisc/lib/ucmpdi2.c
@@ -0,0 +1,25 @@
+#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;
+}