From: Sudip Mukherjee <sudipm.mukherjee@xxxxxxxxx> Subject: m32r: add __ucmpdi2 to fix build failure We are having build failure with m32r and the error message being: ERROR: "__ucmpdi2" [lib/842/842_decompress.ko] undefined! ERROR: "__ucmpdi2" [fs/btrfs/btrfs.ko] undefined! ERROR: "__ucmpdi2" [drivers/scsi/sd_mod.ko] undefined! ERROR: "__ucmpdi2" [drivers/media/i2c/adv7842.ko] undefined! ERROR: "__ucmpdi2" [drivers/md/bcache/bcache.ko] undefined! ERROR: "__ucmpdi2" [drivers/iio/imu/inv_mpu6050/inv-mpu6050.ko] undefined! __ucmpdi2 is introduced to m32r architecture taking example from other architectures like h8300, microblaze, mips. Link: http://lkml.kernel.org/r/1465509213-4280-1-git-send-email-sudipm.mukherjee@xxxxxxxxx Signed-off-by: Sudip Mukherjee <sudip.mukherjee@xxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- arch/m32r/kernel/m32r_ksyms.c | 3 +++ arch/m32r/lib/Makefile | 4 ++-- arch/m32r/lib/libgcc.h | 24 ++++++++++++++++++++++++ arch/m32r/lib/ucmpdi2.c | 17 +++++++++++++++++ 4 files changed, 46 insertions(+), 2 deletions(-) diff -puN arch/m32r/kernel/m32r_ksyms.c~m32r-add-__ucmpdi2-to-fix-build-failure arch/m32r/kernel/m32r_ksyms.c --- a/arch/m32r/kernel/m32r_ksyms.c~m32r-add-__ucmpdi2-to-fix-build-failure +++ a/arch/m32r/kernel/m32r_ksyms.c @@ -41,6 +41,9 @@ EXPORT_SYMBOL(cpu_data); EXPORT_SYMBOL(smp_flush_tlb_page); #endif +extern int __ucmpdi2(unsigned long long a, unsigned long long b); +EXPORT_SYMBOL(__ucmpdi2); + /* compiler generated symbol */ extern void __ashldi3(void); extern void __ashrdi3(void); diff -puN arch/m32r/lib/Makefile~m32r-add-__ucmpdi2-to-fix-build-failure arch/m32r/lib/Makefile --- a/arch/m32r/lib/Makefile~m32r-add-__ucmpdi2-to-fix-build-failure +++ a/arch/m32r/lib/Makefile @@ -3,5 +3,5 @@ # lib-y := checksum.o ashxdi3.o memset.o memcpy.o \ - delay.o strlen.o usercopy.o csum_partial_copy.o - + delay.o strlen.o usercopy.o csum_partial_copy.o \ + ucmpdi2.o diff -puN /dev/null arch/m32r/lib/libgcc.h --- /dev/null +++ a/arch/m32r/lib/libgcc.h @@ -0,0 +1,24 @@ +#ifndef __ASM_LIBGCC_H +#define __ASM_LIBGCC_H + +#include <asm/byteorder.h> + +#ifdef __BIG_ENDIAN +struct DWstruct { + int high, low; +}; +#elif defined(__LITTLE_ENDIAN) +struct DWstruct { + int low, high; +}; +#else +#error I feel sick. +#endif + +typedef union { + struct DWstruct s; + long long ll; +} DWunion; + +#endif /* __ASM_LIBGCC_H */ + diff -puN /dev/null arch/m32r/lib/ucmpdi2.c --- /dev/null +++ a/arch/m32r/lib/ucmpdi2.c @@ -0,0 +1,17 @@ +#include "libgcc.h" + +int __ucmpdi2(unsigned long long a, unsigned long long b) +{ + const DWunion au = {.ll = a}; + const DWunion bu = {.ll = b}; + + if ((unsigned int)au.s.high < (unsigned int)bu.s.high) + return 0; + else if ((unsigned int)au.s.high > (unsigned int)bu.s.high) + return 2; + if ((unsigned int)au.s.low < (unsigned int)bu.s.low) + return 0; + else if ((unsigned int)au.s.low > (unsigned int)bu.s.low) + return 2; + return 1; +} _ -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
