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Date: Sun, 23 Jun 2024 10:01:26 +0800
From: kernel test robot <lkp@...el.com>
To: Uros Bizjak <ubizjak@...il.com>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
Ingo Molnar <mingo@...nel.org>
Subject: arch/x86/include/asm/cmpxchg_32.h:149:9: error: inline assembly
requires more registers than available
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 5f583a3162ffd9f7999af76b8ab634ce2dac9f90
commit: 95ece48165c136b96fae0f6144f55cbf8b24aeb9 locking/atomic/x86: Rewrite x86_32 arch_atomic64_{,fetch}_{and,or,xor}() functions
date: 2 months ago
config: i386-randconfig-061-20240623 (https://download.01.org/0day-ci/archive/20240623/202406230912.F6XFIyA6-lkp@intel.com/config)
compiler: clang version 18.1.5 (https://github.com/llvm/llvm-project 617a15a9eac96088ae5e9134248d8236e34b91b1)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240623/202406230912.F6XFIyA6-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/202406230912.F6XFIyA6-lkp@intel.com/
All errors (new ones prefixed by >>):
In file included from kernel/bpf/core.c:21:
In file included from include/linux/filter.h:8:
In file included from include/linux/atomic.h:7:
In file included from arch/x86/include/asm/atomic.h:8:
In file included from arch/x86/include/asm/cmpxchg.h:143:
>> arch/x86/include/asm/cmpxchg_32.h:149:9: error: inline assembly requires more registers than available
149 | return __arch_try_cmpxchg64_emu(ptr, oldp, new);
| ^
arch/x86/include/asm/cmpxchg_32.h:131:15: note: expanded from macro '__arch_try_cmpxchg64_emu'
131 | asm volatile(ALTERNATIVE(LOCK_PREFIX_HERE \
| ^
arch/x86/include/asm/alternative.h:218:2: note: expanded from macro 'ALTERNATIVE'
218 | OLDINSTR(oldinstr, 1) \
| ^
arch/x86/include/asm/alternative.h:168:2: note: expanded from macro 'OLDINSTR'
168 | "# ALT: oldnstr\n" \
| ^
In file included from kernel/bpf/core.c:21:
In file included from include/linux/filter.h:8:
In file included from include/linux/atomic.h:7:
In file included from arch/x86/include/asm/atomic.h:8:
In file included from arch/x86/include/asm/cmpxchg.h:143:
>> arch/x86/include/asm/cmpxchg_32.h:149:9: error: inline assembly requires more registers than available
arch/x86/include/asm/cmpxchg_32.h:131:15: note: expanded from macro '__arch_try_cmpxchg64_emu'
131 | asm volatile(ALTERNATIVE(LOCK_PREFIX_HERE \
| ^
arch/x86/include/asm/alternative.h:218:2: note: expanded from macro 'ALTERNATIVE'
218 | OLDINSTR(oldinstr, 1) \
| ^
arch/x86/include/asm/alternative.h:168:2: note: expanded from macro 'OLDINSTR'
168 | "# ALT: oldnstr\n" \
| ^
In file included from kernel/bpf/core.c:21:
In file included from include/linux/filter.h:8:
In file included from include/linux/atomic.h:7:
In file included from arch/x86/include/asm/atomic.h:8:
In file included from arch/x86/include/asm/cmpxchg.h:143:
>> arch/x86/include/asm/cmpxchg_32.h:149:9: error: inline assembly requires more registers than available
arch/x86/include/asm/cmpxchg_32.h:131:15: note: expanded from macro '__arch_try_cmpxchg64_emu'
131 | asm volatile(ALTERNATIVE(LOCK_PREFIX_HERE \
| ^
arch/x86/include/asm/alternative.h:218:2: note: expanded from macro 'ALTERNATIVE'
218 | OLDINSTR(oldinstr, 1) \
| ^
arch/x86/include/asm/alternative.h:168:2: note: expanded from macro 'OLDINSTR'
168 | "# ALT: oldnstr\n" \
| ^
In file included from kernel/bpf/core.c:21:
In file included from include/linux/filter.h:8:
In file included from include/linux/atomic.h:7:
In file included from arch/x86/include/asm/atomic.h:8:
In file included from arch/x86/include/asm/cmpxchg.h:143:
>> arch/x86/include/asm/cmpxchg_32.h:149:9: error: inline assembly requires more registers than available
arch/x86/include/asm/cmpxchg_32.h:131:15: note: expanded from macro '__arch_try_cmpxchg64_emu'
131 | asm volatile(ALTERNATIVE(LOCK_PREFIX_HERE \
| ^
arch/x86/include/asm/alternative.h:218:2: note: expanded from macro 'ALTERNATIVE'
218 | OLDINSTR(oldinstr, 1) \
| ^
arch/x86/include/asm/alternative.h:168:2: note: expanded from macro 'OLDINSTR'
168 | "# ALT: oldnstr\n" \
| ^
In file included from kernel/bpf/core.c:21:
In file included from include/linux/filter.h:8:
In file included from include/linux/atomic.h:7:
In file included from arch/x86/include/asm/atomic.h:8:
In file included from arch/x86/include/asm/cmpxchg.h:143:
>> arch/x86/include/asm/cmpxchg_32.h:149:9: error: inline assembly requires more registers than available
arch/x86/include/asm/cmpxchg_32.h:131:15: note: expanded from macro '__arch_try_cmpxchg64_emu'
131 | asm volatile(ALTERNATIVE(LOCK_PREFIX_HERE \
| ^
arch/x86/include/asm/alternative.h:218:2: note: expanded from macro 'ALTERNATIVE'
218 | OLDINSTR(oldinstr, 1) \
| ^
arch/x86/include/asm/alternative.h:168:2: note: expanded from macro 'OLDINSTR'
168 | "# ALT: oldnstr\n" \
| ^
In file included from kernel/bpf/core.c:21:
In file included from include/linux/filter.h:8:
In file included from include/linux/atomic.h:7:
In file included from arch/x86/include/asm/atomic.h:8:
In file included from arch/x86/include/asm/cmpxchg.h:143:
>> arch/x86/include/asm/cmpxchg_32.h:149:9: error: inline assembly requires more registers than available
arch/x86/include/asm/cmpxchg_32.h:131:15: note: expanded from macro '__arch_try_cmpxchg64_emu'
131 | asm volatile(ALTERNATIVE(LOCK_PREFIX_HERE \
| ^
arch/x86/include/asm/alternative.h:218:2: note: expanded from macro 'ALTERNATIVE'
218 | OLDINSTR(oldinstr, 1) \
| ^
arch/x86/include/asm/alternative.h:168:2: note: expanded from macro 'OLDINSTR'
168 | "# ALT: oldnstr\n" \
| ^
In file included from kernel/bpf/core.c:21:
In file included from include/linux/filter.h:8:
In file included from include/linux/atomic.h:7:
In file included from arch/x86/include/asm/atomic.h:8:
In file included from arch/x86/include/asm/cmpxchg.h:143:
>> arch/x86/include/asm/cmpxchg_32.h:149:9: error: inline assembly requires more registers than available
arch/x86/include/asm/cmpxchg_32.h:131:15: note: expanded from macro '__arch_try_cmpxchg64_emu'
131 | asm volatile(ALTERNATIVE(LOCK_PREFIX_HERE \
| ^
arch/x86/include/asm/alternative.h:218:2: note: expanded from macro 'ALTERNATIVE'
218 | OLDINSTR(oldinstr, 1) \
| ^
arch/x86/include/asm/alternative.h:168:2: note: expanded from macro 'OLDINSTR'
168 | "# ALT: oldnstr\n" \
| ^
7 errors generated.
vim +149 arch/x86/include/asm/cmpxchg_32.h
aef95dac9ce4f2 Uros Bizjak 2024-04-08 146
aef95dac9ce4f2 Uros Bizjak 2024-04-08 147 static __always_inline bool arch_try_cmpxchg64(volatile u64 *ptr, u64 *oldp, u64 new)
aef95dac9ce4f2 Uros Bizjak 2024-04-08 148 {
aef95dac9ce4f2 Uros Bizjak 2024-04-08 @149 return __arch_try_cmpxchg64_emu(ptr, oldp, new);
aef95dac9ce4f2 Uros Bizjak 2024-04-08 150 }
aef95dac9ce4f2 Uros Bizjak 2024-04-08 151 #define arch_try_cmpxchg64 arch_try_cmpxchg64
aef95dac9ce4f2 Uros Bizjak 2024-04-08 152
:::::: The code at line 149 was first introduced by commit
:::::: aef95dac9ce4f271cc43195ffc175114ed934cbe locking/atomic/x86: Introduce arch_try_cmpxchg64() for !CONFIG_X86_CMPXCHG64
:::::: TO: Uros Bizjak <ubizjak@...il.com>
:::::: CC: Ingo Molnar <mingo@...nel.org>
--
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