On Sun, Jan 29, 2017 at 1:48 PM Ozgur Karatas [off-list ref] wrote:

29.01.2017, 10:05, "Amit Kumar" [off-list ref]:


On Thu, Jan 26, 2017 at 12:31 PM Greg KH [off-list ref] wrote:

On Thu, Jan 26, 2017 at 11:08:48AM +0530, Amit Kumar wrote:

quoted

Hi,
For last several days when I build arm64/defconfig even against
next-20170125, I
get the following error.
arch/arm64/crypto/crc32-arm64.c:1:0: error: unknown feature modifier
?crc?
 /*
  ^
make[1]: *** [arch/arm64/crypto/crc32-arm64.o] Error 1
make: *** [arch/arm64/crypto] Error 2

Have you tried asking on the linux arm mailing list?



Thank you for your reply.
I'm a newbie and not competent enough to sort out this problem, so I have
sent mail to kernelnewbies to bring this issue to the Linux Kernel
Community. I think that mailing list is more suitable if I were able create
a patch. I am learning kernel development and very soon I'll start
contributing to Linux Kernel


Hello,

you are welcome firstly and of course you will contribute to the
development and thanks. Please find and understand to how to debug C code?
What happens when a kernel module fails? How to fix to compilation errors?

The error in the example is obvious, should be examine to crc32-arm64.c
code, The kernel can't initialize to crc32-arm64.o module and it may be a
feature errors.

Please review crc32-arm64.c
checkpatch.pl check to crc32-arm64.c

run make:

$ make M=arch/arm64/crypto/
  LD      arch/arm64/crypto//built-in.o
  Building modules, stage 2.
  MODPOST 0 modules

Module created! Good!
Check module,

$ make arch/arm64/crypto/crc32-arm64.o
  CHK     include/config/kernel.release
  CHK     include/generated/uapi/linux/version.h
  CHK     include/generated/utsrelease.h
  CHK     include/generated/bounds.h
  CHK     include/generated/timeconst.h
  CHK     include/generated/asm-offsets.h
  CALL    scripts/checksyscalls.sh
  CC      arch/arm64/crypto/crc32-arm64.o

Thank you for your reply. I think these steps will be helpful in debugging
in future.

Regards,

~Ozgur

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.kernelnewbies.org/pipermail/kernelnewbies/attachments/20170129/1ba35230/attachment.html