[zen:6.13/invlpgb-v9 5/13] arch/x86/include/asm/invlpgb.h:30:49: error: invalid input size for constraint 'a'

[kernel test robot <lkp@intel.com>]

tree:   https://github.com/zen-kernel/zen-kernel 6.13/invlpgb-v9
head:   df542b65e9753dea56b584fdca48cb8f8e3f74cd
commit: 83464118a5db5f7faeadcfac9a09205147c0c604 [5/13] x86/mm: add INVLPGB support code
config: i386-buildonly-randconfig-002-20250208 (https://download.01.org/0day-ci/archive/20250208/202502082340.MdGy6PqI-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/20250208/202502082340.MdGy6PqI-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/202502082340.MdGy6PqI-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from arch/x86/kernel/asm-offsets.c:14:
   In file included from include/linux/suspend.h:5:
   In file included from include/linux/swap.h:9:
   In file included from include/linux/memcontrol.h:13:
   In file included from include/linux/cgroup.h:17:
   In file included from include/linux/fs.h:33:
   In file included from include/linux/percpu-rwsem.h:7:
   In file included from include/linux/rcuwait.h:6:
   In file included from include/linux/sched/signal.h:9:
   In file included from include/linux/sched/task.h:13:
   In file included from include/linux/uaccess.h:12:
   In file included from arch/x86/include/asm/uaccess.h:17:
   In file included from arch/x86/include/asm/tlbflush.h:13:
>> arch/x86/include/asm/invlpgb.h:30:49: error: invalid input size for constraint 'a'
      30 |         asm volatile(".byte 0x0f, 0x01, 0xfe" : : "a" (rax), "c" (ecx), "d" (edx));
         |                                                        ^
   1 error generated.
   make[3]: *** [scripts/Makefile.build:102: arch/x86/kernel/asm-offsets.s] Error 1 shuffle=3934676415
   make[3]: Target 'prepare' not remade because of errors.
   make[2]: *** [Makefile:1263: prepare0] Error 2 shuffle=3934676415
   make[2]: Target 'prepare' not remade because of errors.
   make[1]: *** [Makefile:251: __sub-make] Error 2 shuffle=3934676415
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [Makefile:251: __sub-make] Error 2 shuffle=3934676415
   make: Target 'prepare' not remade because of errors.

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for X86_BROADCAST_TLB_FLUSH
   Depends on [n]: CPU_SUP_AMD [=y] && 64BIT [=n]
   Selected by [y]:
   - CPU_SUP_AMD [=y]


vim +/a +30 arch/x86/include/asm/invlpgb.h

     8	
     9	/*
    10	 * INVLPGB does broadcast TLB invalidation across all the CPUs in the system.
    11	 *
    12	 * The INVLPGB instruction is weakly ordered, and a batch of invalidations can
    13	 * be done in a parallel fashion.
    14	 *
    15	 * TLBSYNC is used to ensure that pending INVLPGB invalidations initiated from
    16	 * this CPU have completed.
    17	 */
    18	static inline void __invlpgb(unsigned long asid, unsigned long pcid,
    19				     unsigned long addr, u16 extra_count,
    20				     bool pmd_stride, u8 flags)
    21	{
    22		u32 edx = (pcid << 16) | asid;
    23		u32 ecx = (pmd_stride << 31) | extra_count;
    24		u64 rax = addr | flags;
    25	
    26		/* The low bits in rax are for flags. Verify addr is clean. */
    27		VM_WARN_ON_ONCE(addr & ~PAGE_MASK);
    28	
    29		/* INVLPGB; supported in binutils >= 2.36. */
  > 30		asm volatile(".byte 0x0f, 0x01, 0xfe" : : "a" (rax), "c" (ecx), "d" (edx));
    31	}
    32	

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