From a44ce52363a886d45cf08b4b896cb65f0a9553eb Mon Sep 17 00:00:00 2001 From: Sudip Mukherjee Date: Tue, 26 Jul 2016 15:21:23 -0700 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@gmail.com Signed-off-by: Sudip Mukherjee Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/m32r/kernel/m32r_ksyms.c | 3 +++ arch/m32r/lib/Makefile | 4 ++-- arch/m32r/lib/libgcc.h | 23 +++++++++++++++++++++++ arch/m32r/lib/ucmpdi2.c | 17 +++++++++++++++++ 4 files changed, 45 insertions(+), 2 deletions(-) create mode 100644 arch/m32r/lib/libgcc.h create mode 100644 arch/m32r/lib/ucmpdi2.c (limited to 'arch/m32r') diff --git a/arch/m32r/kernel/m32r_ksyms.c b/arch/m32r/kernel/m32r_ksyms.c index b727e693c805..23f26f4adfff 100644 --- a/arch/m32r/kernel/m32r_ksyms.c +++ b/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 --git a/arch/m32r/lib/Makefile b/arch/m32r/lib/Makefile index d16b4e40d1ae..5889eb9610b5 100644 --- a/arch/m32r/lib/Makefile +++ b/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 --git a/arch/m32r/lib/libgcc.h b/arch/m32r/lib/libgcc.h new file mode 100644 index 000000000000..267aa435bc35 --- /dev/null +++ b/arch/m32r/lib/libgcc.h @@ -0,0 +1,23 @@ +#ifndef __ASM_LIBGCC_H +#define __ASM_LIBGCC_H + +#include + +#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 --git a/arch/m32r/lib/ucmpdi2.c b/arch/m32r/lib/ucmpdi2.c new file mode 100644 index 000000000000..9d3c682c89b5 --- /dev/null +++ b/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; +} -- cgit v1.2.3-59-g8ed1b