Hi, I love your patch! Perhaps something to improve: [auto build test WARNING on arnd-asm-generic/master] [also build test WARNING on linus/master v5.19-rc8 next-20220727] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/guoren-kernel-org/arch-Add-qspinlock-support-with-combo-style/20220724-202743 base: https://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic.git master config: riscv-randconfig-r026-20220727 (https://download.01.org/0day-ci/archive/20220728/202207280822.VHS6qieH-lkp@xxxxxxxxx/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 8dfaecc4c24494337933aff9d9166486ca0949f1) 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 riscv cross compiling tool for clang build # apt-get install binutils-riscv64-linux-gnu # https://github.com/intel-lab-lkp/linux/commit/980c0acb7f432777e3473ab9a5696044e03b3f3d git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review guoren-kernel-org/arch-Add-qspinlock-support-with-combo-style/20220724-202743 git checkout 980c0acb7f432777e3473ab9a5696044e03b3f3d # 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=riscv SHELL=/bin/bash drivers/net/wireguard/ If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): In file included from drivers/net/wireguard/queueing.c:6: In file included from drivers/net/wireguard/queueing.h:9: In file included from drivers/net/wireguard/peer.h:9: In file included from drivers/net/wireguard/device.h:9: In file included from drivers/net/wireguard/noise.h:8: In file included from drivers/net/wireguard/messages.h:10: In file included from include/crypto/chacha20poly1305.h:10: In file included from include/linux/scatterlist.h:9: In file included from arch/riscv/include/asm/io.h:136: include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __raw_readb(PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:560:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu' #define __le16_to_cpu(x) ((__force __u16)(__le16)(x)) ^ In file included from drivers/net/wireguard/queueing.c:6: In file included from drivers/net/wireguard/queueing.h:9: In file included from drivers/net/wireguard/peer.h:9: In file included from drivers/net/wireguard/device.h:9: In file included from drivers/net/wireguard/noise.h:8: In file included from drivers/net/wireguard/messages.h:10: In file included from include/crypto/chacha20poly1305.h:10: In file included from include/linux/scatterlist.h:9: In file included from arch/riscv/include/asm/io.h:136: include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu' #define __le32_to_cpu(x) ((__force __u32)(__le32)(x)) ^ In file included from drivers/net/wireguard/queueing.c:6: In file included from drivers/net/wireguard/queueing.h:9: In file included from drivers/net/wireguard/peer.h:9: In file included from drivers/net/wireguard/device.h:9: In file included from drivers/net/wireguard/noise.h:8: In file included from drivers/net/wireguard/messages.h:10: In file included from include/crypto/chacha20poly1305.h:10: In file included from include/linux/scatterlist.h:9: In file included from arch/riscv/include/asm/io.h:136: include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writeb(value, PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:594:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:604:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:1107:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port; ~~~~~~~~~~ ^ >> drivers/net/wireguard/queueing.c:68:18: warning: cast to smaller integer type 'u32' (aka 'unsigned int') from 'typeof (_x_)' (aka 'struct sk_buff *') [-Wpointer-to-int-cast] WRITE_ONCE(NEXT(xchg_release(&queue->head, skb)), skb); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/atomic/atomic-instrumented.h:1901:2: note: expanded from macro 'xchg_release' arch_xchg_release(__ai_ptr, __VA_ARGS__); \ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/atomic/atomic-arch-fallback.h:24:2: note: expanded from macro 'arch_xchg_release' __atomic_op_release(arch_xchg, __VA_ARGS__) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/atomic.h:68:2: note: expanded from macro '__atomic_op_release' op##_relaxed(args); \ ^~~~~~~~~~~~~~~~~~ note: (skipping 7 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all) include/linux/compiler_types.h:352:22: note: expanded from macro 'compiletime_assert' _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) ^~~~~~~~~ include/linux/compiler_types.h:340:23: note: expanded from macro '_compiletime_assert' __compiletime_assert(condition, msg, prefix, suffix) ^~~~~~~~~ include/linux/compiler_types.h:332:9: note: expanded from macro '__compiletime_assert' if (!(condition)) \ ^~~~~~~~~ >> drivers/net/wireguard/queueing.c:68:18: warning: cast to 'typeof (*((__ai_ptr)))' (aka 'struct sk_buff *') from smaller integer type 'unsigned int' [-Wint-to-pointer-cast] WRITE_ONCE(NEXT(xchg_release(&queue->head, skb)), skb); ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/atomic/atomic-instrumented.h:1901:2: note: expanded from macro 'xchg_release' arch_xchg_release(__ai_ptr, __VA_ARGS__); \ ^ include/linux/atomic/atomic-arch-fallback.h:24:2: note: expanded from macro 'arch_xchg_release' __atomic_op_release(arch_xchg, __VA_ARGS__) ^ include/linux/atomic.h:68:2: note: expanded from macro '__atomic_op_release' op##_relaxed(args); \ ^ note: (skipping 7 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all) include/linux/compiler_types.h:352:22: note: expanded from macro 'compiletime_assert' _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/compiler_types.h:340:23: note: expanded from macro '_compiletime_assert' __compiletime_assert(condition, msg, prefix, suffix) ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/compiler_types.h:332:9: note: expanded from macro '__compiletime_assert' if (!(condition)) \ ^~~~~~~~~ >> drivers/net/wireguard/queueing.c:68:18: warning: cast to smaller integer type 'u32' (aka 'unsigned int') from 'typeof (_x_)' (aka 'struct sk_buff *') [-Wpointer-to-int-cast] WRITE_ONCE(NEXT(xchg_release(&queue->head, skb)), skb); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/atomic/atomic-instrumented.h:1901:2: note: expanded from macro 'xchg_release' arch_xchg_release(__ai_ptr, __VA_ARGS__); \ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/atomic/atomic-arch-fallback.h:24:2: note: expanded from macro 'arch_xchg_release' __atomic_op_release(arch_xchg, __VA_ARGS__) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/atomic.h:68:2: note: expanded from macro '__atomic_op_release' op##_relaxed(args); \ ^~~~~~~~~~~~~~~~~~ note: (skipping 7 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all) include/linux/compiler_types.h:352:22: note: expanded from macro 'compiletime_assert' _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) ^~~~~~~~~ include/linux/compiler_types.h:340:23: note: expanded from macro '_compiletime_assert' __compiletime_assert(condition, msg, prefix, suffix) ^~~~~~~~~ include/linux/compiler_types.h:332:9: note: expanded from macro '__compiletime_assert' if (!(condition)) \ ^~~~~~~~~ >> drivers/net/wireguard/queueing.c:68:18: warning: cast to 'typeof (*((__ai_ptr)))' (aka 'struct sk_buff *') from smaller integer type 'unsigned int' [-Wint-to-pointer-cast] WRITE_ONCE(NEXT(xchg_release(&queue->head, skb)), skb); ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/atomic/atomic-instrumented.h:1901:2: note: expanded from macro 'xchg_release' arch_xchg_release(__ai_ptr, __VA_ARGS__); \ ^ include/linux/atomic/atomic-arch-fallback.h:24:2: note: expanded from macro 'arch_xchg_release' __atomic_op_release(arch_xchg, __VA_ARGS__) ^ include/linux/atomic.h:68:2: note: expanded from macro '__atomic_op_release' op##_relaxed(args); \ ^ note: (skipping 7 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all) include/linux/compiler_types.h:352:22: note: expanded from macro 'compiletime_assert' _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/compiler_types.h:340:23: note: expanded from macro '_compiletime_assert' __compiletime_assert(condition, msg, prefix, suffix) ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/compiler_types.h:332:9: note: expanded from macro '__compiletime_assert' if (!(condition)) \ ^~~~~~~~~ >> drivers/net/wireguard/queueing.c:68:18: warning: cast to smaller integer type 'u32' (aka 'unsigned int') from 'typeof (_x_)' (aka 'struct sk_buff *') [-Wpointer-to-int-cast] WRITE_ONCE(NEXT(xchg_release(&queue->head, skb)), skb); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/atomic/atomic-instrumented.h:1901:2: note: expanded from macro 'xchg_release' arch_xchg_release(__ai_ptr, __VA_ARGS__); \ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/atomic/atomic-arch-fallback.h:24:2: note: expanded from macro 'arch_xchg_release' __atomic_op_release(arch_xchg, __VA_ARGS__) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/atomic.h:68:2: note: expanded from macro '__atomic_op_release' op##_relaxed(args); \ ^~~~~~~~~~~~~~~~~~ note: (skipping 7 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all) include/linux/compiler_types.h:352:22: note: expanded from macro 'compiletime_assert' _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) ^~~~~~~~~ include/linux/compiler_types.h:340:23: note: expanded from macro '_compiletime_assert' __compiletime_assert(condition, msg, prefix, suffix) ^~~~~~~~~ include/linux/compiler_types.h:332:9: note: expanded from macro '__compiletime_assert' if (!(condition)) \ ^~~~~~~~~ >> drivers/net/wireguard/queueing.c:68:18: warning: cast to 'typeof (*((__ai_ptr)))' (aka 'struct sk_buff *') from smaller integer type 'unsigned int' [-Wint-to-pointer-cast] WRITE_ONCE(NEXT(xchg_release(&queue->head, skb)), skb); ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/atomic/atomic-instrumented.h:1901:2: note: expanded from macro 'xchg_release' arch_xchg_release(__ai_ptr, __VA_ARGS__); \ ^ include/linux/atomic/atomic-arch-fallback.h:24:2: note: expanded from macro 'arch_xchg_release' __atomic_op_release(arch_xchg, __VA_ARGS__) ^ include/linux/atomic.h:68:2: note: expanded from macro '__atomic_op_release' op##_relaxed(args); \ ^ note: (skipping 7 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all) include/linux/compiler_types.h:352:22: note: expanded from macro 'compiletime_assert' _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/compiler_types.h:340:23: note: expanded from macro '_compiletime_assert' __compiletime_assert(condition, msg, prefix, suffix) ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/compiler_types.h:332:9: note: expanded from macro '__compiletime_assert' if (!(condition)) \ ^~~~~~~~~ >> drivers/net/wireguard/queueing.c:68:18: warning: cast to smaller integer type 'u32' (aka 'unsigned int') from 'typeof (_x_)' (aka 'struct sk_buff *') [-Wpointer-to-int-cast] WRITE_ONCE(NEXT(xchg_release(&queue->head, skb)), skb); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/atomic/atomic-instrumented.h:1901:2: note: expanded from macro 'xchg_release' arch_xchg_release(__ai_ptr, __VA_ARGS__); \ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/atomic/atomic-arch-fallback.h:24:2: note: expanded from macro 'arch_xchg_release' __atomic_op_release(arch_xchg, __VA_ARGS__) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/atomic.h:68:2: note: expanded from macro '__atomic_op_release' op##_relaxed(args); \ ^~~~~~~~~~~~~~~~~~ note: (skipping 7 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all) include/linux/compiler_types.h:352:22: note: expanded from macro 'compiletime_assert' _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) ^~~~~~~~~ include/linux/compiler_types.h:340:23: note: expanded from macro '_compiletime_assert' __compiletime_assert(condition, msg, prefix, suffix) ^~~~~~~~~ include/linux/compiler_types.h:332:9: note: expanded from macro '__compiletime_assert' if (!(condition)) \ ^~~~~~~~~ >> drivers/net/wireguard/queueing.c:68:18: warning: cast to 'typeof (*((__ai_ptr)))' (aka 'struct sk_buff *') from smaller integer type 'unsigned int' [-Wint-to-pointer-cast] WRITE_ONCE(NEXT(xchg_release(&queue->head, skb)), skb); ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/atomic/atomic-instrumented.h:1901:2: note: expanded from macro 'xchg_release' arch_xchg_release(__ai_ptr, __VA_ARGS__); \ ^ include/linux/atomic/atomic-arch-fallback.h:24:2: note: expanded from macro 'arch_xchg_release' __atomic_op_release(arch_xchg, __VA_ARGS__) ^ include/linux/atomic.h:68:2: note: expanded from macro '__atomic_op_release' op##_relaxed(args); \ ^ note: (skipping 7 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all) include/linux/compiler_types.h:352:22: note: expanded from macro 'compiletime_assert' _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/compiler_types.h:340:23: note: expanded from macro '_compiletime_assert' __compiletime_assert(condition, msg, prefix, suffix) ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/compiler_types.h:332:9: note: expanded from macro '__compiletime_assert' if (!(condition)) \ ^~~~~~~~~ >> drivers/net/wireguard/queueing.c:68:18: warning: cast to smaller integer type 'u32' (aka 'unsigned int') from 'typeof (_x_)' (aka 'struct sk_buff *') [-Wpointer-to-int-cast] WRITE_ONCE(NEXT(xchg_release(&queue->head, skb)), skb); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/atomic/atomic-instrumented.h:1901:2: note: expanded from macro 'xchg_release' arch_xchg_release(__ai_ptr, __VA_ARGS__); \ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/atomic/atomic-arch-fallback.h:24:2: note: expanded from macro 'arch_xchg_release' __atomic_op_release(arch_xchg, __VA_ARGS__) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/atomic.h:68:2: note: expanded from macro '__atomic_op_release' op##_relaxed(args); \ ^~~~~~~~~~~~~~~~~~ note: (skipping 6 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all) include/linux/compiler_types.h:352:22: note: expanded from macro 'compiletime_assert' _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) ^~~~~~~~~ include/linux/compiler_types.h:340:23: note: expanded from macro '_compiletime_assert' __compiletime_assert(condition, msg, prefix, suffix) ^~~~~~~~~ include/linux/compiler_types.h:332:9: note: expanded from macro '__compiletime_assert' if (!(condition)) \ ^~~~~~~~~ >> drivers/net/wireguard/queueing.c:68:18: warning: cast to 'typeof (*((__ai_ptr)))' (aka 'struct sk_buff *') from smaller integer type 'unsigned int' [-Wint-to-pointer-cast] WRITE_ONCE(NEXT(xchg_release(&queue->head, skb)), skb); ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/atomic/atomic-instrumented.h:1901:2: note: expanded from macro 'xchg_release' arch_xchg_release(__ai_ptr, __VA_ARGS__); \ ^ include/linux/atomic/atomic-arch-fallback.h:24:2: note: expanded from macro 'arch_xchg_release' __atomic_op_release(arch_xchg, __VA_ARGS__) ^ include/linux/atomic.h:68:2: note: expanded from macro '__atomic_op_release' op##_relaxed(args); \ ^ note: (skipping 6 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all) include/linux/compiler_types.h:352:22: note: expanded from macro 'compiletime_assert' _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/compiler_types.h:340:23: note: expanded from macro '_compiletime_assert' __compiletime_assert(condition, msg, prefix, suffix) ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/compiler_types.h:332:9: note: expanded from macro '__compiletime_assert' if (!(condition)) \ ^~~~~~~~~ >> drivers/net/wireguard/queueing.c:68:18: warning: cast to smaller integer type 'u32' (aka 'unsigned int') from 'typeof (_x_)' (aka 'struct sk_buff *') [-Wpointer-to-int-cast] WRITE_ONCE(NEXT(xchg_release(&queue->head, skb)), skb); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/atomic/atomic-instrumented.h:1901:2: note: expanded from macro 'xchg_release' arch_xchg_release(__ai_ptr, __VA_ARGS__); \ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/atomic/atomic-arch-fallback.h:24:2: note: expanded from macro 'arch_xchg_release' __atomic_op_release(arch_xchg, __VA_ARGS__) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/atomic.h:68:2: note: expanded from macro '__atomic_op_release' op##_relaxed(args); \ ^~~~~~~~~~~~~~~~~~ note: (skipping 3 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all) drivers/net/wireguard/queueing.c:49:21: note: expanded from macro 'NEXT' #define NEXT(skb) ((skb)->prev) ^~~ include/asm-generic/rwonce.h:61:15: note: expanded from macro 'WRITE_ONCE' __WRITE_ONCE(x, val); \ ^ include/asm-generic/rwonce.h:55:20: note: expanded from macro '__WRITE_ONCE' *(volatile typeof(x) *)&(x) = (val); \ ^ >> drivers/net/wireguard/queueing.c:68:18: warning: cast to 'typeof (*((__ai_ptr)))' (aka 'struct sk_buff *') from smaller integer type 'unsigned int' [-Wint-to-pointer-cast] WRITE_ONCE(NEXT(xchg_release(&queue->head, skb)), skb); ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/atomic/atomic-instrumented.h:1901:2: note: expanded from macro 'xchg_release' arch_xchg_release(__ai_ptr, __VA_ARGS__); \ ^ include/linux/atomic/atomic-arch-fallback.h:24:2: note: expanded from macro 'arch_xchg_release' __atomic_op_release(arch_xchg, __VA_ARGS__) ^ include/linux/atomic.h:68:2: note: expanded from macro '__atomic_op_release' op##_relaxed(args); \ ^ note: (skipping 3 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all) drivers/net/wireguard/queueing.c:49:21: note: expanded from macro 'NEXT' #define NEXT(skb) ((skb)->prev) ^ include/asm-generic/rwonce.h:61:15: note: expanded from macro 'WRITE_ONCE' __WRITE_ONCE(x, val); \ ~~~~~~~~~~~~~^~~~~~~ include/asm-generic/rwonce.h:55:20: note: expanded from macro '__WRITE_ONCE' *(volatile typeof(x) *)&(x) = (val); \ ^ >> drivers/net/wireguard/queueing.c:68:18: warning: cast to smaller integer type 'u32' (aka 'unsigned int') from 'typeof (_x_)' (aka 'struct sk_buff *') [-Wpointer-to-int-cast] WRITE_ONCE(NEXT(xchg_release(&queue->head, skb)), skb); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/atomic/atomic-instrumented.h:1901:2: note: expanded from macro 'xchg_release' arch_xchg_release(__ai_ptr, __VA_ARGS__); \ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/atomic/atomic-arch-fallback.h:24:2: note: expanded from macro 'arch_xchg_release' __atomic_op_release(arch_xchg, __VA_ARGS__) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/atomic.h:68:2: note: expanded from macro '__atomic_op_release' op##_relaxed(args); \ ^~~~~~~~~~~~~~~~~~ note: (skipping 3 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all) drivers/net/wireguard/queueing.c:49:21: note: expanded from macro 'NEXT' #define NEXT(skb) ((skb)->prev) ^~~ include/asm-generic/rwonce.h:61:15: note: expanded from macro 'WRITE_ONCE' __WRITE_ONCE(x, val); \ ^ include/asm-generic/rwonce.h:55:27: note: expanded from macro '__WRITE_ONCE' *(volatile typeof(x) *)&(x) = (val); \ ^ >> drivers/net/wireguard/queueing.c:68:18: warning: cast to 'typeof (*((__ai_ptr)))' (aka 'struct sk_buff *') from smaller integer type 'unsigned int' [-Wint-to-pointer-cast] WRITE_ONCE(NEXT(xchg_release(&queue->head, skb)), skb); ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/atomic/atomic-instrumented.h:1901:2: note: expanded from macro 'xchg_release' arch_xchg_release(__ai_ptr, __VA_ARGS__); \ ^ include/linux/atomic/atomic-arch-fallback.h:24:2: note: expanded from macro 'arch_xchg_release' __atomic_op_release(arch_xchg, __VA_ARGS__) ^ include/linux/atomic.h:68:2: note: expanded from macro '__atomic_op_release' op##_relaxed(args); \ ^ note: (skipping 3 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all) drivers/net/wireguard/queueing.c:49:21: note: expanded from macro 'NEXT' #define NEXT(skb) ((skb)->prev) ^ include/asm-generic/rwonce.h:61:15: note: expanded from macro 'WRITE_ONCE' __WRITE_ONCE(x, val); \ ~~~~~~~~~~~~~^~~~~~~ include/asm-generic/rwonce.h:55:27: note: expanded from macro '__WRITE_ONCE' *(volatile typeof(x) *)&(x) = (val); \ ^ 21 warnings generated. vim +68 drivers/net/wireguard/queueing.c 8b5553ace83cced7 Jason A. Donenfeld 2021-02-22 64 8b5553ace83cced7 Jason A. Donenfeld 2021-02-22 65 static void __wg_prev_queue_enqueue(struct prev_queue *queue, struct sk_buff *skb) 8b5553ace83cced7 Jason A. Donenfeld 2021-02-22 66 { 8b5553ace83cced7 Jason A. Donenfeld 2021-02-22 67 WRITE_ONCE(NEXT(skb), NULL); 8b5553ace83cced7 Jason A. Donenfeld 2021-02-22 @68 WRITE_ONCE(NEXT(xchg_release(&queue->head, skb)), skb); 8b5553ace83cced7 Jason A. Donenfeld 2021-02-22 69 } 8b5553ace83cced7 Jason A. Donenfeld 2021-02-22 70 -- 0-DAY CI Kernel Test Service https://01.org/lkp
