linux-kernel - arch/ia64/kernel/fsys.S:67: Error: Operand 3 of `add' should be a general register r0-r3

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Date:   Sun, 15 Jan 2017 08:38:04 +0800
From:   kbuild test robot <fengguang.wu@...el.com>
To:     Will Deacon <will.deacon@....com>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linux Memory Management List <linux-mm@...ck.org>
Subject: arch/ia64/kernel/fsys.S:67: Error: Operand 3 of `add' should be a
 general register r0-r3

Hi Will,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   f0ad17712b9f71c24e2b8b9725230ef57232377f
commit: da48d094ce5d7c7dcdad9011648a81c42fd1c2ef Kconfig: remove HAVE_LATENCYTOP_SUPPORT
date:   12 months ago
config: ia64-allmodconfig (attached as .config)
compiler: ia64-linux-gcc (GCC) 6.2.0
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout da48d094ce5d7c7dcdad9011648a81c42fd1c2ef
        # save the attached .config to linux build tree
        make.cross ARCH=ia64 

All errors (new ones prefixed by >>):

   arch/ia64/kernel/fsys.S: Assembler messages:
>> arch/ia64/kernel/fsys.S:67: Error: Operand 3 of `add' should be a general register r0-r3
   arch/ia64/kernel/fsys.S:97: Error: Operand 3 of `add' should be a general register r0-r3
   arch/ia64/kernel/fsys.S:193: Error: Operand 3 of `add' should be a general register r0-r3
   arch/ia64/kernel/fsys.S:336: Error: Operand 3 of `add' should be a general register r0-r3
   arch/ia64/kernel/fsys.S:338: Error: Operand 3 of `add' should be a general register r0-r3

vim +67 arch/ia64/kernel/fsys.S

^1da177e Linus Torvalds  2005-04-16  51  ENTRY(fsys_ni_syscall)
^1da177e Linus Torvalds  2005-04-16  52  	.prologue
^1da177e Linus Torvalds  2005-04-16  53  	.altrp b6
^1da177e Linus Torvalds  2005-04-16  54  	.body
^1da177e Linus Torvalds  2005-04-16  55  	mov r8=ENOSYS
^1da177e Linus Torvalds  2005-04-16  56  	mov r10=-1
^1da177e Linus Torvalds  2005-04-16  57  	FSYS_RETURN
^1da177e Linus Torvalds  2005-04-16  58  END(fsys_ni_syscall)
^1da177e Linus Torvalds  2005-04-16  59  
^1da177e Linus Torvalds  2005-04-16  60  ENTRY(fsys_getpid)
^1da177e Linus Torvalds  2005-04-16  61  	.prologue
^1da177e Linus Torvalds  2005-04-16  62  	.altrp b6
^1da177e Linus Torvalds  2005-04-16  63  	.body
96ded9da Pavel Emelyanov 2008-03-28  64  	add r17=IA64_TASK_GROUP_LEADER_OFFSET,r16
96ded9da Pavel Emelyanov 2008-03-28  65  	;;
96ded9da Pavel Emelyanov 2008-03-28  66  	ld8 r17=[r17]				// r17 = current->group_leader
^1da177e Linus Torvalds  2005-04-16 @67  	add r9=TI_FLAGS+IA64_TASK_SIZE,r16
^1da177e Linus Torvalds  2005-04-16  68  	;;
^1da177e Linus Torvalds  2005-04-16  69  	ld4 r9=[r9]
96ded9da Pavel Emelyanov 2008-03-28  70  	add r17=IA64_TASK_TGIDLINK_OFFSET,r17
^1da177e Linus Torvalds  2005-04-16  71  	;;
^1da177e Linus Torvalds  2005-04-16  72  	and r9=TIF_ALLWORK_MASK,r9
96ded9da Pavel Emelyanov 2008-03-28  73  	ld8 r17=[r17]				// r17 = current->group_leader->pids[PIDTYPE_PID].pid
96ded9da Pavel Emelyanov 2008-03-28  74  	;;
96ded9da Pavel Emelyanov 2008-03-28  75  	add r8=IA64_PID_LEVEL_OFFSET,r17

:::::: The code at line 67 was first introduced by commit
:::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2

:::::: TO: Linus Torvalds <torvalds@...970.osdl.org>
:::::: CC: Linus Torvalds <torvalds@...970.osdl.org>

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