On Thu, 9 Jun 2016 22:53:33 +0100 Sudip Mukherjee <sudipm.mukher...@gmail.com>
wrote:
> 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.
>
> --- 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);
> +
This would be neater. Does it work?
From: Andrew Morton <a...@linux-foundation.org>
Subject: m32r-add-__ucmpdi2-to-fix-build-failure-fix
avoid extern declaration in .c file
Cc: Sudip Mukherjee <sudip.mukher...@codethink.co.uk>
Cc: Sudip Mukherjee <sudipm.mukher...@gmail.com>
Signed-off-by: Andrew Morton <a...@linux-foundation.org>
--- a/arch/m32r/kernel/m32r_ksyms.c~m32r-add-__ucmpdi2-to-fix-build-failure-fix
+++ a/arch/m32r/kernel/m32r_ksyms.c
@@ -41,7 +41,6 @@ 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 */
--- a/arch/m32r/lib/libgcc.h~m32r-add-__ucmpdi2-to-fix-build-failure-fix
+++ a/arch/m32r/lib/libgcc.h
@@ -22,3 +22,4 @@ typedef union {
#endif /* __ASM_LIBGCC_H */
+extern int __ucmpdi2(unsigned long long a, unsigned long long b);
