linux-kernel - error: ran out of registers during register allocation

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Message-ID: <202411300710.sjbtlh3s-lkp@intel.com>
Date: Sat, 30 Nov 2024 07:52:54 +0800
From: kernel test robot <lkp@...el.com>
To: Saurabh Sengar <ssengar@...ux.microsoft.com>
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
	linux-kernel@...r.kernel.org, Wei Liu <wei.liu@...nel.org>,
	Michael Kelley <mikelley@...rosoft.com>
Subject: error: ran out of registers during register allocation

Hi Saurabh,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   2ba9f676d0a2e408aef14d679984c26373bf37b7
commit: f83705a51275ed29117d46e1d68e8b16dcb40507 Driver: VMBus: Add Devicetree support
date:   1 year, 7 months ago
config: i386-buildonly-randconfig-002-20241130 (https://download.01.org/0day-ci/archive/20241130/202411300710.sjbtlh3s-lkp@intel.com/config)
compiler: clang version 19.1.3 (https://github.com/llvm/llvm-project ab51eccf88f5321e7c60591c5546b254b6afab99)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241130/202411300710.sjbtlh3s-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202411300710.sjbtlh3s-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from arch/x86/hyperv/mmu.c:3:
   In file included from include/linux/hyperv.h:17:
   In file included from include/linux/mm.h:1970:
   include/linux/vmstat.h:516:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
     516 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
         |                               ~~~~~~~~~~~ ^ ~~~
>> error: ran out of registers during register allocation
>> error: ran out of registers during register allocation
>> error: ran out of registers during register allocation
>> error: ran out of registers during register allocation
>> error: ran out of registers during register allocation
   1 warning and 5 errors generated.
--
   In file included from arch/x86/hyperv/ivm.c:10:
   In file included from include/linux/hyperv.h:17:
   In file included from include/linux/mm.h:1970:
   include/linux/vmstat.h:516:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
     516 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
         |                               ~~~~~~~~~~~ ^ ~~~
>> error: ran out of registers during register allocation
   1 warning and 1 error generated.
--
   In file included from arch/x86/hyperv/irqdomain.c:11:
   In file included from include/linux/pci.h:1970:
   In file included from arch/x86/include/asm/pci.h:5:
   In file included from include/linux/mm.h:1970:
   include/linux/vmstat.h:516:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
     516 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
         |                               ~~~~~~~~~~~ ^ ~~~
>> error: ran out of registers during register allocation
>> error: ran out of registers during register allocation
   1 warning and 2 errors generated.

-- 
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https://github.com/intel/lkp-tests/wiki