linux-kernel - error: arch/x86/include/asm/mshyperv.h:108:2: ran out of registers during register allocation in function 'hyperv_flush_guest

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Message-ID: <202505070733.osOoFQSe-lkp@intel.com>
Date: Wed, 7 May 2025 07:43:06 +0800
From: kernel test robot <lkp@...el.com>
To: Thomas Weißschuh <linux@...ssschuh.net>
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
	linux-kernel@...r.kernel.org,
	Masahiro Yamada <masahiroy@...nel.org>
Subject: error: arch/x86/include/asm/mshyperv.h:108:2: ran out of registers
 during register allocation in function 'hyperv_flush_guest_mapping'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   0d8d44db295ccad20052d6301ef49ff01fb8ae2d
commit: cacd22ce69585a91c386243cd662ada962431e63 kbuild: make all file references relative to source root
date:   6 weeks ago
config: i386-buildonly-randconfig-006-20250506 (https://download.01.org/0day-ci/archive/20250507/202505070733.osOoFQSe-lkp@intel.com/config)
compiler: clang version 20.1.2 (https://github.com/llvm/llvm-project 58df0ef89dd64126512e4ee27b4ac3fd8ddf6247)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250507/202505070733.osOoFQSe-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/202505070733.osOoFQSe-lkp@intel.com/

All errors (new ones prefixed by >>):

>> error: arch/x86/include/asm/mshyperv.h:108:2: ran out of registers during register allocation in function 'hyperv_flush_guest_mapping'
>> error: arch/x86/include/asm/mshyperv.h:108:2: ran out of registers during register allocation in function 'hyperv_flush_guest_mapping_range'
   2 errors generated.
--
>> error: arch/x86/include/asm/mshyperv.h:108:2: ran out of registers during register allocation in function 'hv_get_partition_id'
   1 error generated.
--
>> error: arch/x86/include/asm/mshyperv.h:108:2: ran out of registers during register allocation in function 'hv_unmap_ioapic_interrupt'
>> error: arch/x86/include/asm/mshyperv.h:108:2: ran out of registers during register allocation in function 'hv_map_ioapic_interrupt'
   2 errors generated.
--
>> error: arch/x86/include/asm/mshyperv.h:108:2: ran out of registers during register allocation in function 'hyperv_flush_tlb_multi'
   1 error generated.
--
>> error: arch/x86/include/asm/mshyperv.h:108:2: ran out of registers during register allocation in function 'hv_post_message'
   1 error generated.
--
>> error: arch/x86/include/asm/mshyperv.h:108:2: ran out of registers during register allocation in function 'hv_query_ext_cap'
   1 error generated.

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki