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From: kernel test robot <lkp@intel.com>
To: Ard Biesheuvel <ardb@kernel.org>
Cc: llvm@lists.linux.dev, kbuild-all@lists.01.org,
	linux-kernel@vger.kernel.org,
	Nick Desaulniers <ndesaulniers@google.com>,
	"Steven Rostedt (Google)" <rostedt@goodmis.org>
Subject: arch/arm/include/asm/xor.h:60:3: error: write to reserved register 'R7'
Date: Thu, 7 Jul 2022 20:55:40 +0800	[thread overview]
Message-ID: <202207072015.HvLSHt7M-lkp@intel.com> (raw)

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   9f09069cde34dcd86f5ecf3a3139fd752020812f
commit: d6800ca73a7d325627c045c16d7cfdc7465f4333 Revert "ARM: 9144/1: forbid ftrace with clang and thumb2_kernel"
date:   5 months ago
config: arm-randconfig-r013-20220707 (https://download.01.org/0day-ci/archive/20220707/202207072015.HvLSHt7M-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 66ae1d60bb278793fd651cece264699d522bab84)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install arm cross compiling tool for clang build
        # apt-get install binutils-arm-linux-gnueabi
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d6800ca73a7d325627c045c16d7cfdc7465f4333
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout d6800ca73a7d325627c045c16d7cfdc7465f4333
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   In file included from crypto/xor.c:17:
>> arch/arm/include/asm/xor.h:60:3: error: write to reserved register 'R7'
                   GET_BLOCK_4(p1);
                   ^
   arch/arm/include/asm/xor.h:20:10: note: expanded from macro 'GET_BLOCK_4'
           __asm__("ldmia  %0, {%1, %2, %3, %4}" \
                   ^
   arch/arm/include/asm/xor.h:62:3: error: write to reserved register 'R7'
                   PUT_BLOCK_4(p1);
                   ^
   arch/arm/include/asm/xor.h:42:23: note: expanded from macro 'PUT_BLOCK_4'
           __asm__ __volatile__("stmia     %0!, {%2, %3, %4, %5}" \
                                ^
   arch/arm/include/asm/xor.h:81:3: error: write to reserved register 'R7'
                   GET_BLOCK_4(p1);
                   ^
   arch/arm/include/asm/xor.h:20:10: note: expanded from macro 'GET_BLOCK_4'
           __asm__("ldmia  %0, {%1, %2, %3, %4}" \
                   ^
   arch/arm/include/asm/xor.h:84:3: error: write to reserved register 'R7'
                   PUT_BLOCK_4(p1);
                   ^
   arch/arm/include/asm/xor.h:42:23: note: expanded from macro 'PUT_BLOCK_4'
           __asm__ __volatile__("stmia     %0!, {%2, %3, %4, %5}" \
                                ^
   4 errors generated.


vim +/R7 +60 arch/arm/include/asm/xor.h

^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  13  
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  14  #define GET_BLOCK_2(dst) \
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  15  	__asm__("ldmia	%0, {%1, %2}" \
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  16  		: "=r" (dst), "=r" (a1), "=r" (a2) \
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  17  		: "0" (dst))
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  18  
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  19  #define GET_BLOCK_4(dst) \
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  20  	__asm__("ldmia	%0, {%1, %2, %3, %4}" \
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  21  		: "=r" (dst), "=r" (a1), "=r" (a2), "=r" (a3), "=r" (a4) \
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  22  		: "0" (dst))
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  23  
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  24  #define XOR_BLOCK_2(src) \
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  25  	__asm__("ldmia	%0!, {%1, %2}" \
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  26  		: "=r" (src), "=r" (b1), "=r" (b2) \
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  27  		: "0" (src)); \
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  28  	__XOR(a1, b1); __XOR(a2, b2);
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  29  
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  30  #define XOR_BLOCK_4(src) \
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  31  	__asm__("ldmia	%0!, {%1, %2, %3, %4}" \
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  32  		: "=r" (src), "=r" (b1), "=r" (b2), "=r" (b3), "=r" (b4) \
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  33  		: "0" (src)); \
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  34  	__XOR(a1, b1); __XOR(a2, b2); __XOR(a3, b3); __XOR(a4, b4)
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  35  
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  36  #define PUT_BLOCK_2(dst) \
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  37  	__asm__ __volatile__("stmia	%0!, {%2, %3}" \
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  38  		: "=r" (dst) \
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  39  		: "0" (dst), "r" (a1), "r" (a2))
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  40  
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  41  #define PUT_BLOCK_4(dst) \
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  42  	__asm__ __volatile__("stmia	%0!, {%2, %3, %4, %5}" \
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  43  		: "=r" (dst) \
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  44  		: "0" (dst), "r" (a1), "r" (a2), "r" (a3), "r" (a4))
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  45  
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  46  static void
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  47  xor_arm4regs_2(unsigned long bytes, unsigned long *p1, unsigned long *p2)
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  48  {
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  49  	unsigned int lines = bytes / sizeof(unsigned long) / 4;
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  50  	register unsigned int a1 __asm__("r4");
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  51  	register unsigned int a2 __asm__("r5");
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  52  	register unsigned int a3 __asm__("r6");
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  53  	register unsigned int a4 __asm__("r7");
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  54  	register unsigned int b1 __asm__("r8");
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  55  	register unsigned int b2 __asm__("r9");
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  56  	register unsigned int b3 __asm__("ip");
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  57  	register unsigned int b4 __asm__("lr");
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  58  
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  59  	do {
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16 @60  		GET_BLOCK_4(p1);
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  61  		XOR_BLOCK_4(p2);
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  62  		PUT_BLOCK_4(p1);
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  63  	} while (--lines);
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  64  }
^1da177e4c3f41 include/asm-arm/xor.h Linus Torvalds 2005-04-16  65  

:::::: The code at line 60 was first introduced by commit
:::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2

:::::: TO: Linus Torvalds <torvalds@ppc970.osdl.org>
:::::: CC: Linus Torvalds <torvalds@ppc970.osdl.org>

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp

             reply	other threads:[~2022-07-07 12:56 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-07-07 12:55 kernel test robot [this message]
2022-10-07 13:15 arch/arm/include/asm/xor.h:60:3: error: write to reserved register 'R7' kernel test robot
2022-10-10 17:03 ` Nick Desaulniers

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