Re: [PATCH] hwrng: add Zhaoxin rng driver base on rep_xstore instruction

kernel test robot
2023-11-07T16:30:28Z

Hi LeoLiu-oc,

kernel test robot noticed the following build errors:

[auto build test ERROR on char-misc/char-misc-testing]
[also build test ERROR on char-misc/char-misc-next char-misc/char-misc-linus herbert-cryptodev-2.6/master linus/master v6.6 next-20231107]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url: https://github.com/intel-lab-lkp/linux/commits/LeoLiu-oc/hwrng-add-Zhaoxin-rng-driver-base-on-rep_xstore-instruction/20231107-152659
base: char-misc/char-misc-testing
patch link: https://lore.kernel.org/r/20231107070900.496827-1-LeoLiu-oc%40zhaoxin.com
patch subject: [PATCH] hwrng: add Zhaoxin rng driver base on rep_xstore instruction
config: i386-randconfig-003-20231107 (https://download.01.org/0day-ci/archive/20231107/202311072324.klxSzojj-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231107/202311072324.klxSzojj-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202311072324.klxSzojj-lkp@intel.com/

All errors (new ones prefixed by >>):

drivers/char/hw_random/zhaoxin-rng.c: Assembler messages:
>> drivers/char/hw_random/zhaoxin-rng.c:42: Error: bad register name `%rcx'
>> drivers/char/hw_random/zhaoxin-rng.c:43: Error: bad register name `%rdx'
>> drivers/char/hw_random/zhaoxin-rng.c:44: Error: bad register name `%rdi'

vim +42 drivers/char/hw_random/zhaoxin-rng.c

39
40 static inline int rep_xstore(size_t size, size_t factor, void *result)
41 {
> 42 __asm__ __volatile__ (
> 43 "movq %0, %%rcx\n"
> 44 "movq %1, %%rdx\n"
45 "movq %2, %%rdi\n"
46 ".byte 0xf3, 0x0f, 0xa7, 0xc0"
47 :
48 : "r"(size), "r"(factor), "r"(result)
49 : "%rcx", "%rdx", "%rdi", "memory");
50
51 return 0;
52 }
53

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