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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>
This commit is contained in:
John David Anglin 2013-04-20 19:41:06 +00:00 committed by Helge Deller
parent 0fbd06761f
commit ca0ad83da1
3 changed files with 29 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/parisc/kernel/parisc_ksyms.c
View File

@ -120,11 +120,13 @@ extern void __ashrdi3(void);
extern void __ashldi3(void);
extern void __lshrdi3(void);
extern void __muldi3(void);
extern void __ucmpdi2(void);
EXPORT_SYMBOL(__ashrdi3);
EXPORT_SYMBOL(__ashldi3);
EXPORT_SYMBOL(__lshrdi3);
EXPORT_SYMBOL(__muldi3);
EXPORT_SYMBOL(__ucmpdi2);
asmlinkage void * __canonicalize_funcptr_for_compare(void *);
EXPORT_SYMBOL(__canonicalize_funcptr_for_compare);

3
arch/parisc/lib/Makefile
View File

@ -2,6 +2,7 @@
# Makefile for parisc-specific library files
#
lib-y := lusercopy.o bitops.o checksum.o io.o memset.o fixup.o memcpy.o
lib-y := lusercopy.o bitops.o checksum.o io.o memset.o fixup.o memcpy.o \
ucmpdi2.o
obj-y := iomap.o

25
arch/parisc/lib/ucmpdi2.c Normal file
View File

@ -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;
}