[mark:arm64/uaccess/rework 11/19] arch/arm64/kernel/traps.c:413:7: warning: value size does not match register size specified by the constraint and modifier

From: kernel test robot
Date: Mon Oct 11 2021 - 17:07:51 EST

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tree: https://git.kernel.org/pub/scm/linux/kernel/git/mark/linux.git arm64/uaccess/rework
head: 692de878f919de31942d0d28571b5e6f32c7135e
commit: c3579cc9e5be2d67027753c6bc44a28168f6377c [11/19] arm64: add fixup handler for uaccess primitives
config: arm64-randconfig-r033-20211011 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project f95d9c95bbf4cf662b9a181245fc6dcede39f590)
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 arm64 cross compiling tool for clang build
# apt-get install binutils-aarch64-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/mark/linux.git/commit/?id=c3579cc9e5be2d67027753c6bc44a28168f6377c
git remote add mark https://git.kernel.org/pub/scm/linux/kernel/git/mark/linux.git
git fetch --no-tags mark arm64/uaccess/rework
git checkout c3579cc9e5be2d67027753c6bc44a28168f6377c
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=arm64

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All warnings (new ones prefixed by >>):

>> arch/arm64/kernel/traps.c:413:7: warning: value size does not match register size specified by the constraint and modifier [-Wasm-operand-widths]
if (get_user(instr_le, (__le16 __user *)pc))
^
arch/arm64/include/asm/uaccess.h:311:18: note: expanded from macro 'get_user'
#define get_user __get_user
^
arch/arm64/include/asm/uaccess.h:307:2: note: expanded from macro '__get_user'
__get_user_error((x), (ptr), __gu_err); \
^
arch/arm64/include/asm/uaccess.h:298:3: note: expanded from macro '__get_user_error'
__raw_get_user((x), __p, (err)); \
^
arch/arm64/include/asm/uaccess.h:288:2: note: expanded from macro '__raw_get_user'
__raw_get_mem("ldtr", x, ptr, err); \
^
arch/arm64/include/asm/uaccess.h:267:49: note: expanded from macro '__raw_get_mem'
__get_mem_asm(ldr "b", "%w", __gu_val, (ptr), (err)); \
^
arch/arm64/kernel/traps.c:413:7: note: use constraint modifier "w"
arch/arm64/include/asm/uaccess.h:311:18: note: expanded from macro 'get_user'
#define get_user __get_user
^
arch/arm64/include/asm/uaccess.h:307:2: note: expanded from macro '__get_user'
__get_user_error((x), (ptr), __gu_err); \
^
arch/arm64/include/asm/uaccess.h:298:3: note: expanded from macro '__get_user_error'
__raw_get_user((x), __p, (err)); \
^
note: (skipping 3 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
arch/arm64/include/asm/asm-extable.h:64:10: note: expanded from macro '_ASM_EXTABLE_EFAULT_ZERO'
"(" EX_DATA_REG(ERR, err) " | " EX_DATA_REG(ZERO, zero) ")")
^
arch/arm64/include/asm/asm-extable.h:59:19: note: expanded from macro 'EX_DATA_REG'
"((.L__gpr_num_" #gpr ") << " __stringify(EX_DATA_REG_##reg##_SHIFT) ")"
^
<scratch space>:10:2: note: expanded from here
"%0"
^
>> arch/arm64/kernel/traps.c:413:7: warning: value size does not match register size specified by the constraint and modifier [-Wasm-operand-widths]
if (get_user(instr_le, (__le16 __user *)pc))
^
arch/arm64/include/asm/uaccess.h:311:18: note: expanded from macro 'get_user'
#define get_user __get_user
^
arch/arm64/include/asm/uaccess.h:307:2: note: expanded from macro '__get_user'
__get_user_error((x), (ptr), __gu_err); \
^
arch/arm64/include/asm/uaccess.h:298:3: note: expanded from macro '__get_user_error'
__raw_get_user((x), __p, (err)); \
^
arch/arm64/include/asm/uaccess.h:288:2: note: expanded from macro '__raw_get_user'
__raw_get_mem("ldtr", x, ptr, err); \
^
arch/arm64/include/asm/uaccess.h:270:49: note: expanded from macro '__raw_get_mem'
__get_mem_asm(ldr "h", "%w", __gu_val, (ptr), (err)); \
^
arch/arm64/kernel/traps.c:413:7: note: use constraint modifier "w"
arch/arm64/include/asm/uaccess.h:311:18: note: expanded from macro 'get_user'
#define get_user __get_user
^
arch/arm64/include/asm/uaccess.h:307:2: note: expanded from macro '__get_user'
__get_user_error((x), (ptr), __gu_err); \
^
arch/arm64/include/asm/uaccess.h:298:3: note: expanded from macro '__get_user_error'
__raw_get_user((x), __p, (err)); \
^
note: (skipping 3 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
arch/arm64/include/asm/asm-extable.h:64:10: note: expanded from macro '_ASM_EXTABLE_EFAULT_ZERO'
"(" EX_DATA_REG(ERR, err) " | " EX_DATA_REG(ZERO, zero) ")")
^
arch/arm64/include/asm/asm-extable.h:59:19: note: expanded from macro 'EX_DATA_REG'
"((.L__gpr_num_" #gpr ") << " __stringify(EX_DATA_REG_##reg##_SHIFT) ")"
^
<scratch space>:20:2: note: expanded from here
"%0"
^
>> arch/arm64/kernel/traps.c:413:7: warning: value size does not match register size specified by the constraint and modifier [-Wasm-operand-widths]
if (get_user(instr_le, (__le16 __user *)pc))
^
arch/arm64/include/asm/uaccess.h:311:18: note: expanded from macro 'get_user'
#define get_user __get_user
^
arch/arm64/include/asm/uaccess.h:307:2: note: expanded from macro '__get_user'
__get_user_error((x), (ptr), __gu_err); \
^
arch/arm64/include/asm/uaccess.h:298:3: note: expanded from macro '__get_user_error'
__raw_get_user((x), __p, (err)); \
^
arch/arm64/include/asm/uaccess.h:288:2: note: expanded from macro '__raw_get_user'
__raw_get_mem("ldtr", x, ptr, err); \
^
arch/arm64/include/asm/uaccess.h:273:45: note: expanded from macro '__raw_get_mem'
__get_mem_asm(ldr, "%w", __gu_val, (ptr), (err)); \
^
arch/arm64/kernel/traps.c:413:7: note: use constraint modifier "w"
arch/arm64/include/asm/uaccess.h:311:18: note: expanded from macro 'get_user'
#define get_user __get_user
^
arch/arm64/include/asm/uaccess.h:307:2: note: expanded from macro '__get_user'
__get_user_error((x), (ptr), __gu_err); \
^
arch/arm64/include/asm/uaccess.h:298:3: note: expanded from macro '__get_user_error'
__raw_get_user((x), __p, (err)); \
^
note: (skipping 3 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
arch/arm64/include/asm/asm-extable.h:64:10: note: expanded from macro '_ASM_EXTABLE_EFAULT_ZERO'
"(" EX_DATA_REG(ERR, err) " | " EX_DATA_REG(ZERO, zero) ")")
^
arch/arm64/include/asm/asm-extable.h:59:19: note: expanded from macro 'EX_DATA_REG'
"((.L__gpr_num_" #gpr ") << " __stringify(EX_DATA_REG_##reg##_SHIFT) ")"
^
<scratch space>:30:2: note: expanded from here
"%0"
^
>> arch/arm64/kernel/traps.c:413:7: warning: value size does not match register size specified by the constraint and modifier [-Wasm-operand-widths]
if (get_user(instr_le, (__le16 __user *)pc))
^
arch/arm64/include/asm/uaccess.h:311:18: note: expanded from macro 'get_user'
#define get_user __get_user
^
arch/arm64/include/asm/uaccess.h:307:2: note: expanded from macro '__get_user'
__get_user_error((x), (ptr), __gu_err); \
^
arch/arm64/include/asm/uaccess.h:298:3: note: expanded from macro '__get_user_error'
__raw_get_user((x), __p, (err)); \
^
arch/arm64/include/asm/uaccess.h:288:2: note: expanded from macro '__raw_get_user'
__raw_get_mem("ldtr", x, ptr, err); \
^
arch/arm64/include/asm/uaccess.h:276:46: note: expanded from macro '__raw_get_mem'
__get_mem_asm(ldr, "%x", __gu_val, (ptr), (err)); \
^
arch/arm64/kernel/traps.c:413:7: note: use constraint modifier "w"
arch/arm64/include/asm/uaccess.h:311:18: note: expanded from macro 'get_user'
#define get_user __get_user
^
arch/arm64/include/asm/uaccess.h:307:2: note: expanded from macro '__get_user'
__get_user_error((x), (ptr), __gu_err); \
^
arch/arm64/include/asm/uaccess.h:298:3: note: expanded from macro '__get_user_error'
__raw_get_user((x), __p, (err)); \
^
note: (skipping 3 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
arch/arm64/include/asm/asm-extable.h:64:10: note: expanded from macro '_ASM_EXTABLE_EFAULT_ZERO'
"(" EX_DATA_REG(ERR, err) " | " EX_DATA_REG(ZERO, zero) ")")
^
arch/arm64/include/asm/asm-extable.h:59:19: note: expanded from macro 'EX_DATA_REG'
"((.L__gpr_num_" #gpr ") << " __stringify(EX_DATA_REG_##reg##_SHIFT) ")"
^
<scratch space>:40:2: note: expanded from here
"%0"
^
>> arch/arm64/kernel/traps.c:413:7: warning: value size does not match register size specified by the constraint and modifier [-Wasm-operand-widths]
if (get_user(instr_le, (__le16 __user *)pc))
^
arch/arm64/include/asm/uaccess.h:311:18: note: expanded from macro 'get_user'
#define get_user __get_user
^
arch/arm64/include/asm/uaccess.h:307:2: note: expanded from macro '__get_user'
__get_user_error((x), (ptr), __gu_err); \
^
arch/arm64/include/asm/uaccess.h:298:3: note: expanded from macro '__get_user_error'
__raw_get_user((x), __p, (err)); \
^
arch/arm64/include/asm/uaccess.h:288:2: note: expanded from macro '__raw_get_user'
__raw_get_mem("ldtr", x, ptr, err); \
^
arch/arm64/include/asm/uaccess.h:267:49: note: expanded from macro '__raw_get_mem'
__get_mem_asm(ldr "b", "%w", __gu_val, (ptr), (err)); \
^
arch/arm64/kernel/traps.c:413:7: note: use constraint modifier "w"
arch/arm64/include/asm/uaccess.h:311:18: note: expanded from macro 'get_user'
#define get_user __get_user
^
arch/arm64/include/asm/uaccess.h:307:2: note: expanded from macro '__get_user'
__get_user_error((x), (ptr), __gu_err); \
^
arch/arm64/include/asm/uaccess.h:298:3: note: expanded from macro '__get_user_error'
__raw_get_user((x), __p, (err)); \
^
note: (skipping 3 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
arch/arm64/include/asm/asm-extable.h:64:10: note: expanded from macro '_ASM_EXTABLE_EFAULT_ZERO'
"(" EX_DATA_REG(ERR, err) " | " EX_DATA_REG(ZERO, zero) ")")
^
arch/arm64/include/asm/asm-extable.h:59:19: note: expanded from macro 'EX_DATA_REG'
"((.L__gpr_num_" #gpr ") << " __stringify(EX_DATA_REG_##reg##_SHIFT) ")"
^
<scratch space>:10:2: note: expanded from here
"%0"
^
>> arch/arm64/kernel/traps.c:413:7: warning: value size does not match register size specified by the constraint and modifier [-Wasm-operand-widths]
if (get_user(instr_le, (__le16 __user *)pc))
^
arch/arm64/include/asm/uaccess.h:311:18: note: expanded from macro 'get_user'
#define get_user __get_user
^
arch/arm64/include/asm/uaccess.h:307:2: note: expanded from macro '__get_user'
__get_user_error((x), (ptr), __gu_err); \
^
arch/arm64/include/asm/uaccess.h:298:3: note: expanded from macro '__get_user_error'
__raw_get_user((x), __p, (err)); \
^
arch/arm64/include/asm/uaccess.h:288:2: note: expanded from macro '__raw_get_user'
__raw_get_mem("ldtr", x, ptr, err); \
^
arch/arm64/include/asm/uaccess.h:270:49: note: expanded from macro '__raw_get_mem'
__get_mem_asm(ldr "h", "%w", __gu_val, (ptr), (err)); \
^
arch/arm64/kernel/traps.c:413:7: note: use constraint modifier "w"
arch/arm64/include/asm/uaccess.h:311:18: note: expanded from macro 'get_user'
#define get_user __get_user
^
arch/arm64/include/asm/uaccess.h:307:2: note: expanded from macro '__get_user'
__get_user_error((x), (ptr), __gu_err); \
^
arch/arm64/include/asm/uaccess.h:298:3: note: expanded from macro '__get_user_error'
__raw_get_user((x), __p, (err)); \
^
note: (skipping 3 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
arch/arm64/include/asm/asm-extable.h:64:10: note: expanded from macro '_ASM_EXTABLE_EFAULT_ZERO'
"(" EX_DATA_REG(ERR, err) " | " EX_DATA_REG(ZERO, zero) ")")
^
arch/arm64/include/asm/asm-extable.h:59:19: note: expanded from macro 'EX_DATA_REG'
"((.L__gpr_num_" #gpr ") << " __stringify(EX_DATA_REG_##reg##_SHIFT) ")"
^
<scratch space>:20:2: note: expanded from here
"%0"
^
>> arch/arm64/kernel/traps.c:413:7: warning: value size does not match register size specified by the constraint and modifier [-Wasm-operand-widths]
if (get_user(instr_le, (__le16 __user *)pc))
^
arch/arm64/include/asm/uaccess.h:311:18: note: expanded from macro 'get_user'
#define get_user __get_user
^
arch/arm64/include/asm/uaccess.h:307:2: note: expanded from macro '__get_user'
__get_user_error((x), (ptr), __gu_err); \
^
arch/arm64/include/asm/uaccess.h:298:3: note: expanded from macro '__get_user_error'
__raw_get_user((x), __p, (err)); \
^
arch/arm64/include/asm/uaccess.h:288:2: note: expanded from macro '__raw_get_user'
__raw_get_mem("ldtr", x, ptr, err); \
^
arch/arm64/include/asm/uaccess.h:273:45: note: expanded from macro '__raw_get_mem'
__get_mem_asm(ldr, "%w", __gu_val, (ptr), (err)); \
^
arch/arm64/kernel/traps.c:413:7: note: use constraint modifier "w"
arch/arm64/include/asm/uaccess.h:311:18: note: expanded from macro 'get_user'
#define get_user __get_user
^
arch/arm64/include/asm/uaccess.h:307:2: note: expanded from macro '__get_user'
__get_user_error((x), (ptr), __gu_err); \
^
arch/arm64/include/asm/uaccess.h:298:3: note: expanded from macro '__get_user_error'
__raw_get_user((x), __p, (err)); \
^
note: (skipping 3 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
arch/arm64/include/asm/asm-extable.h:64:10: note: expanded from macro '_ASM_EXTABLE_EFAULT_ZERO'
"(" EX_DATA_REG(ERR, err) " | " EX_DATA_REG(ZERO, zero) ")")
^
arch/arm64/include/asm/asm-extable.h:59:19: note: expanded from macro 'EX_DATA_REG'
"((.L__gpr_num_" #gpr ") << " __stringify(EX_DATA_REG_##reg##_SHIFT) ")"
^
<scratch space>:30:2: note: expanded from here
"%0"
^
>> arch/arm64/kernel/traps.c:413:7: warning: value size does not match register size specified by the constraint and modifier [-Wasm-operand-widths]
if (get_user(instr_le, (__le16 __user *)pc))
^
arch/arm64/include/asm/uaccess.h:311:18: note: expanded from macro 'get_user'
#define get_user __get_user
^
arch/arm64/include/asm/uaccess.h:307:2: note: expanded from macro '__get_user'
__get_user_error((x), (ptr), __gu_err); \
^
arch/arm64/include/asm/uaccess.h:298:3: note: expanded from macro '__get_user_error'
__raw_get_user((x), __p, (err)); \
^
arch/arm64/include/asm/uaccess.h:288:2: note: expanded from macro '__raw_get_user'
__raw_get_mem("ldtr", x, ptr, err); \
^
arch/arm64/include/asm/uaccess.h:276:46: note: expanded from macro '__raw_get_mem'
__get_mem_asm(ldr, "%x", __gu_val, (ptr), (err)); \
^
arch/arm64/kernel/traps.c:413:7: note: use constraint modifier "w"
arch/arm64/include/asm/uaccess.h:311:18: note: expanded from macro 'get_user'
#define get_user __get_user
^
arch/arm64/include/asm/uaccess.h:307:2: note: expanded from macro '__get_user'
__get_user_error((x), (ptr), __gu_err); \
^
arch/arm64/include/asm/uaccess.h:298:3: note: expanded from macro '__get_user_error'
__raw_get_user((x), __p, (err)); \
^
note: (skipping 3 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
arch/arm64/include/asm/asm-extable.h:64:10: note: expanded from macro '_ASM_EXTABLE_EFAULT_ZERO'
"(" EX_DATA_REG(ERR, err) " | " EX_DATA_REG(ZERO, zero) ")")
^
arch/arm64/include/asm/asm-extable.h:59:19: note: expanded from macro 'EX_DATA_REG'
"((.L__gpr_num_" #gpr ") << " __stringify(EX_DATA_REG_##reg##_SHIFT) ")"
^
<scratch space>:40:2: note: expanded from here
"%0"
^
>> arch/arm64/kernel/traps.c:413:7: warning: value size does not match register size specified by the constraint and modifier [-Wasm-operand-widths]
if (get_user(instr_le, (__le16 __user *)pc))
^
arch/arm64/include/asm/uaccess.h:311:18: note: expanded from macro 'get_user'
#define get_user __get_user
^
arch/arm64/include/asm/uaccess.h:307:2: note: expanded from macro '__get_user'
__get_user_error((x), (ptr), __gu_err); \
^
arch/arm64/include/asm/uaccess.h:298:3: note: expanded from macro '__get_user_error'
__raw_get_user((x), __p, (err)); \
^
arch/arm64/include/asm/uaccess.h:288:2: note: expanded from macro '__raw_get_user'
__raw_get_mem("ldtr", x, ptr, err); \
^
arch/arm64/include/asm/uaccess.h:267:49: note: expanded from macro '__raw_get_mem'
__get_mem_asm(ldr "b", "%w", __gu_val, (ptr), (err)); \
^
arch/arm64/kernel/traps.c:413:7: note: use constraint modifier "w"
arch/arm64/include/asm/uaccess.h:311:18: note: expanded from macro 'get_user'
#define get_user __get_user
^
arch/arm64/include/asm/uaccess.h:307:2: note: expanded from macro '__get_user'
__get_user_error((x), (ptr), __gu_err); \
^
arch/arm64/include/asm/uaccess.h:298:3: note: expanded from macro '__get_user_error'
__raw_get_user((x), __p, (err)); \
^
note: (skipping 3 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
arch/arm64/include/asm/asm-extable.h:64:10: note: expanded from macro '_ASM_EXTABLE_EFAULT_ZERO'
"(" EX_DATA_REG(ERR, err) " | " EX_DATA_REG(ZERO, zero) ")")
^
arch/arm64/include/asm/asm-extable.h:59:19: note: expanded from macro 'EX_DATA_REG'
"((.L__gpr_num_" #gpr ") << " __stringify(EX_DATA_REG_##reg##_SHIFT) ")"
^
<scratch space>:10:2: note: expanded from here
"%0"
^
>> arch/arm64/kernel/traps.c:413:7: warning: value size does not match register size specified by the constraint and modifier [-Wasm-operand-widths]
if (get_user(instr_le, (__le16 __user *)pc))
^
arch/arm64/include/asm/uaccess.h:311:18: note: expanded from macro 'get_user'
#define get_user __get_user
^
arch/arm64/include/asm/uaccess.h:307:2: note: expanded from macro '__get_user'
__get_user_error((x), (ptr), __gu_err); \
^
arch/arm64/include/asm/uaccess.h:298:3: note: expanded from macro '__get_user_error'
__raw_get_user((x), __p, (err)); \
^
arch/arm64/include/asm/uaccess.h:288:2: note: expanded from macro '__raw_get_user'
__raw_get_mem("ldtr", x, ptr, err); \
^
arch/arm64/include/asm/uaccess.h:270:49: note: expanded from macro '__raw_get_mem'
__get_mem_asm(ldr "h", "%w", __gu_val, (ptr), (err)); \
^
arch/arm64/kernel/traps.c:413:7: note: use constraint modifier "w"
arch/arm64/include/asm/uaccess.h:311:18: note: expanded from macro 'get_user'
#define get_user __get_user
^
arch/arm64/include/asm/uaccess.h:307:2: note: expanded from macro '__get_user'
__get_user_error((x), (ptr), __gu_err); \
^
arch/arm64/include/asm/uaccess.h:298:3: note: expanded from macro '__get_user_error'
__raw_get_user((x), __p, (err)); \
^
note: (skipping 3 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
arch/arm64/include/asm/asm-extable.h:64:10: note: expanded from macro '_ASM_EXTABLE_EFAULT_ZERO'
"(" EX_DATA_REG(ERR, err) " | " EX_DATA_REG(ZERO, zero) ")")
^
arch/arm64/include/asm/asm-extable.h:59:19: note: expanded from macro 'EX_DATA_REG'
"((.L__gpr_num_" #gpr ") << " __stringify(EX_DATA_REG_##reg##_SHIFT) ")"
^
<scratch space>:20:2: note: expanded from here
"%0"
^
>> arch/arm64/kernel/traps.c:413:7: warning: value size does not match register size specified by the constraint and modifier [-Wasm-operand-widths]
if (get_user(instr_le, (__le16 __user *)pc))
^
arch/arm64/include/asm/uaccess.h:311:18: note: expanded from macro 'get_user'
#define get_user __get_user
^
arch/arm64/include/asm/uaccess.h:307:2: note: expanded from macro '__get_user'
__get_user_error((x), (ptr), __gu_err); \
^
arch/arm64/include/asm/uaccess.h:298:3: note: expanded from macro '__get_user_error'
__raw_get_user((x), __p, (err)); \
^
arch/arm64/include/asm/uaccess.h:288:2: note: expanded from macro '__raw_get_user'
__raw_get_mem("ldtr", x, ptr, err); \
^
arch/arm64/include/asm/uaccess.h:273:45: note: expanded from macro '__raw_get_mem'
__get_mem_asm(ldr, "%w", __gu_val, (ptr), (err)); \
^
arch/arm64/kernel/traps.c:413:7: note: use constraint modifier "w"
arch/arm64/include/asm/uaccess.h:311:18: note: expanded from macro 'get_user'
#define get_user __get_user
^
arch/arm64/include/asm/uaccess.h:307:2: note: expanded from macro '__get_user'
__get_user_error((x), (ptr), __gu_err); \
^
arch/arm64/include/asm/uaccess.h:298:3: note: expanded from macro '__get_user_error'
__raw_get_user((x), __p, (err)); \
^
note: (skipping 3 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
arch/arm64/include/asm/asm-extable.h:64:10: note: expanded from macro '_ASM_EXTABLE_EFAULT_ZERO'
"(" EX_DATA_REG(ERR, err) " | " EX_DATA_REG(ZERO, zero) ")")
^
arch/arm64/include/asm/asm-extable.h:59:19: note: expanded from macro 'EX_DATA_REG'
"((.L__gpr_num_" #gpr ") << " __stringify(EX_DATA_REG_##reg##_SHIFT) ")"
^
<scratch space>:30:2: note: expanded from here
"%0"
^
>> arch/arm64/kernel/traps.c:413:7: warning: value size does not match register size specified by the constraint and modifier [-Wasm-operand-widths]
if (get_user(instr_le, (__le16 __user *)pc))
^
arch/arm64/include/asm/uaccess.h:311:18: note: expanded from macro 'get_user'
#define get_user __get_user
^
arch/arm64/include/asm/uaccess.h:307:2: note: expanded from macro '__get_user'
__get_user_error((x), (ptr), __gu_err); \
^
arch/arm64/include/asm/uaccess.h:298:3: note: expanded from macro '__get_user_error'
__raw_get_user((x), __p, (err)); \
^
arch/arm64/include/asm/uaccess.h:288:2: note: expanded from macro '__raw_get_user'
__raw_get_mem("ldtr", x, ptr, err); \
^
arch/arm64/include/asm/uaccess.h:276:46: note: expanded from macro '__raw_get_mem'
__get_mem_asm(ldr, "%x", __gu_val, (ptr), (err)); \
^
arch/arm64/kernel/traps.c:413:7: note: use constraint modifier "w"
arch/arm64/include/asm/uaccess.h:311:18: note: expanded from macro 'get_user'
#define get_user __get_user
^
arch/arm64/include/asm/uaccess.h:307:2: note: expanded from macro '__get_user'
__get_user_error((x), (ptr), __gu_err); \
^
arch/arm64/include/asm/uaccess.h:298:3: note: expanded from macro '__get_user_error'
__raw_get_user((x), __p, (err)); \
^
note: (skipping 3 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
arch/arm64/include/asm/asm-extable.h:64:10: note: expanded from macro '_ASM_EXTABLE_EFAULT_ZERO'
"(" EX_DATA_REG(ERR, err) " | " EX_DATA_REG(ZERO, zero) ")")
^
arch/arm64/include/asm/asm-extable.h:59:19: note: expanded from macro 'EX_DATA_REG'
"((.L__gpr_num_" #gpr ") << " __stringify(EX_DATA_REG_##reg##_SHIFT) ")"
^
<scratch space>:40:2: note: expanded from here
"%0"
^
arch/arm64/kernel/traps.c:419:8: warning: value size does not match register size specified by the constraint and modifier [-Wasm-operand-widths]
if (get_user(instr_le, (__le16 __user *)(pc + 2)))
^
arch/arm64/include/asm/uaccess.h:311:18: note: expanded from macro 'get_user'
#define get_user __get_user
^
arch/arm64/include/asm/uaccess.h:307:2: note: expanded from macro '__get_user'
__get_user_error((x), (ptr), __gu_err); \
^
arch/arm64/include/asm/uaccess.h:298:3: note: expanded from macro '__get_user_error'
__raw_get_user((x), __p, (err)); \
^
arch/arm64/include/asm/uaccess.h:288:2: note: expanded from macro '__raw_get_user'
__raw_get_mem("ldtr", x, ptr, err); \
^
arch/arm64/include/asm/uaccess.h:267:49: note: expanded from macro '__raw_get_mem'
__get_mem_asm(ldr "b", "%w", __gu_val, (ptr), (err)); \
^
arch/arm64/kernel/traps.c:419:8: note: use constraint modifier "w"
arch/arm64/include/asm/uaccess.h:311:18: note: expanded from macro 'get_user'
#define get_user __get_user
^
arch/arm64/include/asm/uaccess.h:307:2: note: expanded from macro '__get_user'
__get_user_error((x), (ptr), __gu_err); \
^
arch/arm64/include/asm/uaccess.h:298:3: note: expanded from macro '__get_user_error'
__raw_get_user((x), __p, (err)); \
^
note: (skipping 3 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
arch/arm64/include/asm/asm-extable.h:64:10: note: expanded from macro '_ASM_EXTABLE_EFAULT_ZERO'
"(" EX_DATA_REG(ERR, err) " | " EX_DATA_REG(ZERO, zero) ")")
^
arch/arm64/include/asm/asm-extable.h:59:19: note: expanded from macro 'EX_DATA_REG'
"((.L__gpr_num_" #gpr ") << " __stringify(EX_DATA_REG_##reg##_SHIFT) ")"
^
<scratch space>:63:2: note: expanded from here
"%0"
^
arch/arm64/kernel/traps.c:419:8: warning: value size does not match register size specified by the constraint and modifier [-Wasm-operand-widths]
if (get_user(instr_le, (__le16 __user *)(pc + 2)))
^
arch/arm64/include/asm/uaccess.h:311:18: note: expanded from macro 'get_user'
#define get_user __get_user
^
arch/arm64/include/asm/uaccess.h:307:2: note: expanded from macro '__get_user'
__get_user_error((x), (ptr), __gu_err); \
^
arch/arm64/include/asm/uaccess.h:298:3: note: expanded from macro '__get_user_error'
__raw_get_user((x), __p, (err)); \
^
arch/arm64/include/asm/uaccess.h:288:2: note: expanded from macro '__raw_get_user'
__raw_get_mem("ldtr", x, ptr, err); \
^
arch/arm64/include/asm/uaccess.h:270:49: note: expanded from macro '__raw_get_mem'
__get_mem_asm(ldr "h", "%w", __gu_val, (ptr), (err)); \
^
arch/arm64/kernel/traps.c:419:8: note: use constraint modifier "w"
arch/arm64/include/asm/uaccess.h:311:18: note: expanded from macro 'get_user'
#define get_user __get_user
^
arch/arm64/include/asm/uaccess.h:307:2: note: expanded from macro '__get_user'
__get_user_error((x), (ptr), __gu_err); \
^
..

vim +413 arch/arm64/kernel/traps.c

9b79f52d1a702d Punit Agrawal 2014-11-18 396
9b79f52d1a702d Punit Agrawal 2014-11-18 397 static int call_undef_hook(struct pt_regs *regs)
9b79f52d1a702d Punit Agrawal 2014-11-18 398 {
9b79f52d1a702d Punit Agrawal 2014-11-18 399 struct undef_hook *hook;
9b79f52d1a702d Punit Agrawal 2014-11-18 400 unsigned long flags;
9b79f52d1a702d Punit Agrawal 2014-11-18 401 u32 instr;
9b79f52d1a702d Punit Agrawal 2014-11-18 402 int (*fn)(struct pt_regs *regs, u32 instr) = NULL;
9b79f52d1a702d Punit Agrawal 2014-11-18 403 void __user *pc = (void __user *)instruction_pointer(regs);
9b79f52d1a702d Punit Agrawal 2014-11-18 404
0bf0f444b2c492 Will Deacon 2018-08-07 405 if (!user_mode(regs)) {
0bf0f444b2c492 Will Deacon 2018-08-07 406 __le32 instr_le;
25f12ae45fc193 Christoph Hellwig 2020-06-17 407 if (get_kernel_nofault(instr_le, (__force __le32 *)pc))
0bf0f444b2c492 Will Deacon 2018-08-07 408 goto exit;
0bf0f444b2c492 Will Deacon 2018-08-07 409 instr = le32_to_cpu(instr_le);
0bf0f444b2c492 Will Deacon 2018-08-07 410 } else if (compat_thumb_mode(regs)) {
9b79f52d1a702d Punit Agrawal 2014-11-18 411 /* 16-bit Thumb instruction */
6cf5d4af83e04f Luc Van Oostenryck 2017-06-28 412 __le16 instr_le;
6cf5d4af83e04f Luc Van Oostenryck 2017-06-28 @413 if (get_user(instr_le, (__le16 __user *)pc))
9b79f52d1a702d Punit Agrawal 2014-11-18 414 goto exit;
6cf5d4af83e04f Luc Van Oostenryck 2017-06-28 415 instr = le16_to_cpu(instr_le);
9b79f52d1a702d Punit Agrawal 2014-11-18 416 if (aarch32_insn_is_wide(instr)) {
9b79f52d1a702d Punit Agrawal 2014-11-18 417 u32 instr2;
9b79f52d1a702d Punit Agrawal 2014-11-18 418
6cf5d4af83e04f Luc Van Oostenryck 2017-06-28 419 if (get_user(instr_le, (__le16 __user *)(pc + 2)))
9b79f52d1a702d Punit Agrawal 2014-11-18 420 goto exit;
6cf5d4af83e04f Luc Van Oostenryck 2017-06-28 421 instr2 = le16_to_cpu(instr_le);
9b79f52d1a702d Punit Agrawal 2014-11-18 422 instr = (instr << 16) | instr2;
9b79f52d1a702d Punit Agrawal 2014-11-18 423 }
9b79f52d1a702d Punit Agrawal 2014-11-18 424 } else {
9b79f52d1a702d Punit Agrawal 2014-11-18 425 /* 32-bit ARM instruction */
6cf5d4af83e04f Luc Van Oostenryck 2017-06-28 426 __le32 instr_le;
6cf5d4af83e04f Luc Van Oostenryck 2017-06-28 427 if (get_user(instr_le, (__le32 __user *)pc))
9b79f52d1a702d Punit Agrawal 2014-11-18 428 goto exit;
6cf5d4af83e04f Luc Van Oostenryck 2017-06-28 429 instr = le32_to_cpu(instr_le);
9b79f52d1a702d Punit Agrawal 2014-11-18 430 }
9b79f52d1a702d Punit Agrawal 2014-11-18 431
9b79f52d1a702d Punit Agrawal 2014-11-18 432 raw_spin_lock_irqsave(&undef_lock, flags);
9b79f52d1a702d Punit Agrawal 2014-11-18 433 list_for_each_entry(hook, &undef_hook, node)
9b79f52d1a702d Punit Agrawal 2014-11-18 434 if ((instr & hook->instr_mask) == hook->instr_val &&
9b79f52d1a702d Punit Agrawal 2014-11-18 435 (regs->pstate & hook->pstate_mask) == hook->pstate_val)
9b79f52d1a702d Punit Agrawal 2014-11-18 436 fn = hook->fn;
9b79f52d1a702d Punit Agrawal 2014-11-18 437
9b79f52d1a702d Punit Agrawal 2014-11-18 438 raw_spin_unlock_irqrestore(&undef_lock, flags);
9b79f52d1a702d Punit Agrawal 2014-11-18 439 exit:
9b79f52d1a702d Punit Agrawal 2014-11-18 440 return fn ? fn(regs, instr) : 1;
9b79f52d1a702d Punit Agrawal 2014-11-18 441 }
9b79f52d1a702d Punit Agrawal 2014-11-18 442

:::::: The code at line 413 was first introduced by commit
:::::: 6cf5d4af83e04f4cfae91bfdefd9d4d6949c09b2 arm64: fix endianness annotation in call_undef_hook()

:::::: TO: Luc Van Oostenryck <luc.vanoostenryck@xxxxxxxxx>
:::::: CC: Will Deacon <will.deacon@xxxxxxx>

---
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