tree: https://kernel.googlesource.com/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git master head: 1bbbbcfdc0f0fa7a98ba0d551fd03d2c45d5a318 commit: 9ecf5ad522e09d6e11a7e0a0b1845622a480f478 [241/242] crypto: sha256 - Add missing MODULE_LICENSE() to lib/crypto/sha256.c config: x86_64-randconfig-c001-201934 (attached as .config) compiler: gcc-7 (Debian 7.4.0-11) 7.4.0 reproduce: git checkout 9ecf5ad522e09d6e11a7e0a0b1845622a480f478 # save the attached .config to linux build tree make ARCH=x86_64 If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): In file included from arch/x86/include/asm/bitops.h:16:0, from include/linux/bitops.h:19, from lib/crypto/sha256.c:14: include/asm-generic/qspinlock.h: In function 'queued_spin_trylock': >> include/asm-generic/qspinlock.h:65:55: warning: pointer targets in passing argument 2 of 'atomic_try_cmpxchg' differ in signedness [-Wpointer-sign] return likely(atomic_try_cmpxchg_acquire(&lock->val, &val, _Q_LOCKED_VAL)); ^ include/linux/compiler.h:33:34: note: in definition of macro '__branch_check__' ______r = __builtin_expect(!!(x), expect); \ ^ >> include/asm-generic/qspinlock.h:65:9: note: in expansion of macro 'likely' return likely(atomic_try_cmpxchg_acquire(&lock->val, &val, _Q_LOCKED_VAL)); ^~~~~~ In file included from arch/x86/include/asm/atomic.h:265:0, from include/linux/atomic.h:7, from include/linux/jump_label.h:249, from include/linux/static_key.h:1, from arch/x86/include/asm/nospec-branch.h:6, from arch/x86/include/asm/paravirt_types.h:46, from arch/x86/include/asm/ptrace.h:94, from arch/x86/include/asm/math_emu.h:5, from arch/x86/include/asm/processor.h:12, from arch/x86/include/asm/cpufeature.h:5, from arch/x86/include/asm/thread_info.h:53, from include/linux/thread_info.h:38, from arch/x86/include/asm/preempt.h:7, from include/linux/preempt.h:78, from include/linux/spinlock.h:51, from include/linux/seqlock.h:36, from include/linux/time.h:6, from include/linux/stat.h:19, from include/linux/module.h:10, from lib/crypto/sha256.c:16: include/asm-generic/atomic-instrumented.h:691:1: note: expected 'int *' but argument is of type 'u32 * {aka unsigned int *}' atomic_try_cmpxchg(atomic_t *v, int *old, int new) ^~~~~~~~~~~~~~~~~~ In file included from arch/x86/include/asm/bitops.h:16:0, from include/linux/bitops.h:19, from lib/crypto/sha256.c:14: >> include/asm-generic/qspinlock.h:65:55: warning: pointer targets in passing argument 2 of 'atomic_try_cmpxchg' differ in signedness [-Wpointer-sign] return likely(atomic_try_cmpxchg_acquire(&lock->val, &val, _Q_LOCKED_VAL)); ^ include/linux/compiler.h:35:19: note: in definition of macro '__branch_check__' expect, is_constant); \ ^~~~~~~~~~~ >> include/asm-generic/qspinlock.h:65:9: note: in expansion of macro 'likely' return likely(atomic_try_cmpxchg_acquire(&lock->val, &val, _Q_LOCKED_VAL)); ^~~~~~ In file included from arch/x86/include/asm/atomic.h:265:0, from include/linux/atomic.h:7, from include/linux/jump_label.h:249, from include/linux/static_key.h:1, from arch/x86/include/asm/nospec-branch.h:6, from arch/x86/include/asm/paravirt_types.h:46, from arch/x86/include/asm/ptrace.h:94, from arch/x86/include/asm/math_emu.h:5, from arch/x86/include/asm/processor.h:12, from arch/x86/include/asm/cpufeature.h:5, from arch/x86/include/asm/thread_info.h:53, from include/linux/thread_info.h:38, from arch/x86/include/asm/preempt.h:7, from include/linux/preempt.h:78, from include/linux/spinlock.h:51, from include/linux/seqlock.h:36, from include/linux/time.h:6, from include/linux/stat.h:19, from include/linux/module.h:10, from lib/crypto/sha256.c:16: include/asm-generic/atomic-instrumented.h:691:1: note: expected 'int *' but argument is of type 'u32 * {aka unsigned int *}' atomic_try_cmpxchg(atomic_t *v, int *old, int new) ^~~~~~~~~~~~~~~~~~ In file included from arch/x86/include/asm/bitops.h:16:0, from include/linux/bitops.h:19, from lib/crypto/sha256.c:14: include/asm-generic/qspinlock.h: In function 'queued_spin_lock': include/asm-generic/qspinlock.h:78:52: warning: pointer targets in passing argument 2 of 'atomic_try_cmpxchg' differ in signedness [-Wpointer-sign] if (likely(atomic_try_cmpxchg_acquire(&lock->val, &val, _Q_LOCKED_VAL))) ^ include/linux/compiler.h:58:52: note: in definition of macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^~~~ >> include/asm-generic/qspinlock.h:78:2: note: in expansion of macro 'if' if (likely(atomic_try_cmpxchg_acquire(&lock->val, &val, _Q_LOCKED_VAL))) ^~ include/linux/compiler.h:45:22: note: in expansion of macro '__branch_check__' # define likely(x) (__branch_check__(x, 1, __builtin_constant_p(x))) ^~~~~~~~~~~~~~~~ include/asm-generic/qspinlock.h:78:6: note: in expansion of macro 'likely' if (likely(atomic_try_cmpxchg_acquire(&lock->val, &val, _Q_LOCKED_VAL))) ^~~~~~ In file included from arch/x86/include/asm/atomic.h:265:0, from include/linux/atomic.h:7, from include/linux/jump_label.h:249, from include/linux/static_key.h:1, from arch/x86/include/asm/nospec-branch.h:6, from arch/x86/include/asm/paravirt_types.h:46, from arch/x86/include/asm/ptrace.h:94, from arch/x86/include/asm/math_emu.h:5, from arch/x86/include/asm/processor.h:12, from arch/x86/include/asm/cpufeature.h:5, from arch/x86/include/asm/thread_info.h:53, from include/linux/thread_info.h:38, from arch/x86/include/asm/preempt.h:7, from include/linux/preempt.h:78, from include/linux/spinlock.h:51, from include/linux/seqlock.h:36, from include/linux/time.h:6, from include/linux/stat.h:19, from include/linux/module.h:10, from lib/crypto/sha256.c:16: include/asm-generic/atomic-instrumented.h:691:1: note: expected 'int *' but argument is of type 'u32 * {aka unsigned int *}' atomic_try_cmpxchg(atomic_t *v, int *old, int new) ^~~~~~~~~~~~~~~~~~ In file included from arch/x86/include/asm/bitops.h:16:0, from include/linux/bitops.h:19, from lib/crypto/sha256.c:14: include/asm-generic/qspinlock.h:78:52: warning: pointer targets in passing argument 2 of 'atomic_try_cmpxchg' differ in signedness [-Wpointer-sign] if (likely(atomic_try_cmpxchg_acquire(&lock->val, &val, _Q_LOCKED_VAL))) ^ include/linux/compiler.h:58:52: note: in definition of macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^~~~ >> include/asm-generic/qspinlock.h:78:2: note: in expansion of macro 'if' if (likely(atomic_try_cmpxchg_acquire(&lock->val, &val, _Q_LOCKED_VAL))) ^~ include/linux/compiler.h:45:22: note: in expansion of macro '__branch_check__' # define likely(x) (__branch_check__(x, 1, __builtin_constant_p(x))) ^~~~~~~~~~~~~~~~ include/asm-generic/qspinlock.h:78:6: note: in expansion of macro 'likely' if (likely(atomic_try_cmpxchg_acquire(&lock->val, &val, _Q_LOCKED_VAL))) ^~~~~~ In file included from arch/x86/include/asm/atomic.h:265:0, from include/linux/atomic.h:7, from include/linux/jump_label.h:249, from include/linux/static_key.h:1, from arch/x86/include/asm/nospec-branch.h:6, from arch/x86/include/asm/paravirt_types.h:46, from arch/x86/include/asm/ptrace.h:94, from arch/x86/include/asm/math_emu.h:5, from arch/x86/include/asm/processor.h:12, from arch/x86/include/asm/cpufeature.h:5, from arch/x86/include/asm/thread_info.h:53, from include/linux/thread_info.h:38, from arch/x86/include/asm/preempt.h:7, from include/linux/preempt.h:78, from include/linux/spinlock.h:51, from include/linux/seqlock.h:36, from include/linux/time.h:6, from include/linux/stat.h:19, from include/linux/module.h:10, from lib/crypto/sha256.c:16: include/asm-generic/atomic-instrumented.h:691:1: note: expected 'int *' but argument is of type 'u32 * {aka unsigned int *}' atomic_try_cmpxchg(atomic_t *v, int *old, int new) ^~~~~~~~~~~~~~~~~~ In file included from arch/x86/include/asm/bitops.h:16:0, from include/linux/bitops.h:19, from lib/crypto/sha256.c:14: include/asm-generic/qspinlock.h:78:52: warning: pointer targets in passing argument 2 of 'atomic_try_cmpxchg' differ in signedness [-Wpointer-sign] if (likely(atomic_try_cmpxchg_acquire(&lock->val, &val, _Q_LOCKED_VAL))) ^ include/linux/compiler.h:58:61: note: in definition of macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^~~~ >> include/asm-generic/qspinlock.h:78:2: note: in expansion of macro 'if' if (likely(atomic_try_cmpxchg_acquire(&lock->val, &val, _Q_LOCKED_VAL))) ^~ include/linux/compiler.h:45:22: note: in expansion of macro '__branch_check__' # define likely(x) (__branch_check__(x, 1, __builtin_constant_p(x))) ^~~~~~~~~~~~~~~~ include/asm-generic/qspinlock.h:78:6: note: in expansion of macro 'likely' if (likely(atomic_try_cmpxchg_acquire(&lock->val, &val, _Q_LOCKED_VAL))) ^~~~~~ In file included from arch/x86/include/asm/atomic.h:265:0, from include/linux/atomic.h:7, from include/linux/jump_label.h:249, from include/linux/static_key.h:1, from arch/x86/include/asm/nospec-branch.h:6, from arch/x86/include/asm/paravirt_types.h:46, from arch/x86/include/asm/ptrace.h:94, from arch/x86/include/asm/math_emu.h:5, from arch/x86/include/asm/processor.h:12, from arch/x86/include/asm/cpufeature.h:5, from arch/x86/include/asm/thread_info.h:53, from include/linux/thread_info.h:38, from arch/x86/include/asm/preempt.h:7, from include/linux/preempt.h:78, from include/linux/spinlock.h:51, from include/linux/seqlock.h:36, from include/linux/time.h:6, from include/linux/stat.h:19, from include/linux/module.h:10, from lib/crypto/sha256.c:16: include/asm-generic/atomic-instrumented.h:691:1: note: expected 'int *' but argument is of type 'u32 * {aka unsigned int *}' atomic_try_cmpxchg(atomic_t *v, int *old, int new) ^~~~~~~~~~~~~~~~~~ In file included from arch/x86/include/asm/bitops.h:16:0, from include/linux/bitops.h:19, from lib/crypto/sha256.c:14: include/asm-generic/qspinlock.h:78:52: warning: pointer targets in passing argument 2 of 'atomic_try_cmpxchg' differ in signedness [-Wpointer-sign] if (likely(atomic_try_cmpxchg_acquire(&lock->val, &val, _Q_LOCKED_VAL))) ^ include/linux/compiler.h:58:61: note: in definition of macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^~~~ >> include/asm-generic/qspinlock.h:78:2: note: in expansion of macro 'if' if (likely(atomic_try_cmpxchg_acquire(&lock->val, &val, _Q_LOCKED_VAL))) ^~ include/linux/compiler.h:45:22: note: in expansion of macro '__branch_check__' # define likely(x) (__branch_check__(x, 1, __builtin_constant_p(x))) ^~~~~~~~~~~~~~~~ include/asm-generic/qspinlock.h:78:6: note: in expansion of macro 'likely' if (likely(atomic_try_cmpxchg_acquire(&lock->val, &val, _Q_LOCKED_VAL))) ^~~~~~ In file included from arch/x86/include/asm/atomic.h:265:0, from include/linux/atomic.h:7, from include/linux/jump_label.h:249, from include/linux/static_key.h:1, from arch/x86/include/asm/nospec-branch.h:6, from arch/x86/include/asm/paravirt_types.h:46, from arch/x86/include/asm/ptrace.h:94, from arch/x86/include/asm/math_emu.h:5, from arch/x86/include/asm/processor.h:12, from arch/x86/include/asm/cpufeature.h:5, from arch/x86/include/asm/thread_info.h:53, from include/linux/thread_info.h:38, from arch/x86/include/asm/preempt.h:7, from include/linux/preempt.h:78, from include/linux/spinlock.h:51, from include/linux/seqlock.h:36, from include/linux/time.h:6, from include/linux/stat.h:19, from include/linux/module.h:10, from lib/crypto/sha256.c:16: include/asm-generic/atomic-instrumented.h:691:1: note: expected 'int *' but argument is of type 'u32 * {aka unsigned int *}' atomic_try_cmpxchg(atomic_t *v, int *old, int new) ^~~~~~~~~~~~~~~~~~ In file included from arch/x86/include/asm/bitops.h:16:0, from include/linux/bitops.h:19, from lib/crypto/sha256.c:14: include/asm-generic/qspinlock.h:78:52: warning: pointer targets in passing argument 2 of 'atomic_try_cmpxchg' differ in signedness [-Wpointer-sign] if (likely(atomic_try_cmpxchg_acquire(&lock->val, &val, _Q_LOCKED_VAL))) ^ include/linux/compiler.h:69:3: note: in definition of macro '__trace_if_value' (cond) ? \ ^~~~ include/linux/compiler.h:56:28: note: in expansion of macro '__trace_if_var' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^~~~~~~~~~~~~~ >> include/asm-generic/qspinlock.h:78:2: note: in expansion of macro 'if' if (likely(atomic_try_cmpxchg_acquire(&lock->val, &val, _Q_LOCKED_VAL))) ^~ include/linux/compiler.h:45:22: note: in expansion of macro '__branch_check__' # define likely(x) (__branch_check__(x, 1, __builtin_constant_p(x))) ^~~~~~~~~~~~~~~~ include/asm-generic/qspinlock.h:78:6: note: in expansion of macro 'likely' if (likely(atomic_try_cmpxchg_acquire(&lock->val, &val, _Q_LOCKED_VAL))) ^~~~~~ In file included from arch/x86/include/asm/atomic.h:265:0, from include/linux/atomic.h:7, from include/linux/jump_label.h:249, from include/linux/static_key.h:1, from arch/x86/include/asm/nospec-branch.h:6, from arch/x86/include/asm/paravirt_types.h:46, from arch/x86/include/asm/ptrace.h:94, from arch/x86/include/asm/math_emu.h:5, from arch/x86/include/asm/processor.h:12, from arch/x86/include/asm/cpufeature.h:5, from arch/x86/include/asm/thread_info.h:53, from include/linux/thread_info.h:38, from arch/x86/include/asm/preempt.h:7, from include/linux/preempt.h:78, from include/linux/spinlock.h:51, from include/linux/seqlock.h:36, from include/linux/time.h:6, from include/linux/stat.h:19, from include/linux/module.h:10, from lib/crypto/sha256.c:16: include/asm-generic/atomic-instrumented.h:691:1: note: expected 'int *' but argument is of type 'u32 * {aka unsigned int *}' atomic_try_cmpxchg(atomic_t *v, int *old, int new) ^~~~~~~~~~~~~~~~~~ In file included from arch/x86/include/asm/bitops.h:16:0, from include/linux/bitops.h:19, from lib/crypto/sha256.c:14: include/asm-generic/qspinlock.h:78:52: warning: pointer targets in passing argument 2 of 'atomic_try_cmpxchg' differ in signedness [-Wpointer-sign] if (likely(atomic_try_cmpxchg_acquire(&lock->val, &val, _Q_LOCKED_VAL))) ^ include/linux/compiler.h:69:3: note: in definition of macro '__trace_if_value' (cond) ? \ ^~~~ include/linux/compiler.h:56:28: note: in expansion of macro '__trace_if_var' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^~~~~~~~~~~~~~ >> include/asm-generic/qspinlock.h:78:2: note: in expansion of macro 'if' if (likely(atomic_try_cmpxchg_acquire(&lock->val, &val, _Q_LOCKED_VAL))) ^~ include/linux/compiler.h:45:22: note: in expansion of macro '__branch_check__' # define likely(x) (__branch_check__(x, 1, __builtin_constant_p(x))) ^~~~~~~~~~~~~~~~ include/asm-generic/qspinlock.h:78:6: note: in expansion of macro 'likely' if (likely(atomic_try_cmpxchg_acquire(&lock->val, &val, _Q_LOCKED_VAL))) ^~~~~~ In file included from arch/x86/include/asm/atomic.h:265:0, from include/linux/atomic.h:7, from include/linux/jump_label.h:249, from include/linux/static_key.h:1, from arch/x86/include/asm/nospec-branch.h:6, from arch/x86/include/asm/paravirt_types.h:46, from arch/x86/include/asm/ptrace.h:94, from arch/x86/include/asm/math_emu.h:5, from arch/x86/include/asm/processor.h:12, from arch/x86/include/asm/cpufeature.h:5, from arch/x86/include/asm/thread_info.h:53, from include/linux/thread_info.h:38, from arch/x86/include/asm/preempt.h:7, from include/linux/preempt.h:78, from include/linux/spinlock.h:51, from include/linux/seqlock.h:36, from include/linux/time.h:6, from include/linux/stat.h:19, from include/linux/module.h:10, from lib/crypto/sha256.c:16: include/asm-generic/atomic-instrumented.h:691:1: note: expected 'int *' but argument is of type 'u32 * {aka unsigned int *}' atomic_try_cmpxchg(atomic_t *v, int *old, int new) ^~~~~~~~~~~~~~~~~~ In file included from arch/x86/include/asm/bitops.h:16:0, from include/linux/bitops.h:19, from lib/crypto/sha256.c:14: include/asm-generic/qrwlock.h: In function 'queued_write_trylock': >> include/asm-generic/qrwlock.h:65:56: warning: pointer targets in passing argument 2 of 'atomic_try_cmpxchg' differ in signedness [-Wpointer-sign] return likely(atomic_try_cmpxchg_acquire(&lock->cnts, &cnts, ^ include/linux/compiler.h:33:34: note: in definition of macro '__branch_check__' ______r = __builtin_expect(!!(x), expect); \ ^ >> include/asm-generic/qrwlock.h:65:9: note: in expansion of macro 'likely' return likely(atomic_try_cmpxchg_acquire(&lock->cnts, &cnts, ^~~~~~ In file included from arch/x86/include/asm/atomic.h:265:0, from include/linux/atomic.h:7, from include/linux/jump_label.h:249, from include/linux/static_key.h:1, from arch/x86/include/asm/nospec-branch.h:6, from arch/x86/include/asm/paravirt_types.h:46, from arch/x86/include/asm/ptrace.h:94, from arch/x86/include/asm/math_emu.h:5, from arch/x86/include/asm/processor.h:12, from arch/x86/include/asm/cpufeature.h:5, from arch/x86/include/asm/thread_info.h:53, from include/linux/thread_info.h:38, from arch/x86/include/asm/preempt.h:7, from include/linux/preempt.h:78, from include/linux/spinlock.h:51, from include/linux/seqlock.h:36, from include/linux/time.h:6, from include/linux/stat.h:19, from include/linux/module.h:10, from lib/crypto/sha256.c:16: include/asm-generic/atomic-instrumented.h:691:1: note: expected 'int *' but argument is of type 'u32 * {aka unsigned int *}' atomic_try_cmpxchg(atomic_t *v, int *old, int new) ^~~~~~~~~~~~~~~~~~ In file included from arch/x86/include/asm/bitops.h:16:0, from include/linux/bitops.h:19, from lib/crypto/sha256.c:14: >> include/asm-generic/qrwlock.h:65:56: warning: pointer targets in passing argument 2 of 'atomic_try_cmpxchg' differ in signedness [-Wpointer-sign] return likely(atomic_try_cmpxchg_acquire(&lock->cnts, &cnts, ^ include/linux/compiler.h:35:19: note: in definition of macro '__branch_check__' expect, is_constant); \ ^~~~~~~~~~~ >> include/asm-generic/qrwlock.h:65:9: note: in expansion of macro 'likely' return likely(atomic_try_cmpxchg_acquire(&lock->cnts, &cnts, ^~~~~~ In file included from arch/x86/include/asm/atomic.h:265:0, from include/linux/atomic.h:7, from include/linux/jump_label.h:249, from include/linux/static_key.h:1, from arch/x86/include/asm/nospec-branch.h:6, from arch/x86/include/asm/paravirt_types.h:46, from arch/x86/include/asm/ptrace.h:94, from arch/x86/include/asm/math_emu.h:5, from arch/x86/include/asm/processor.h:12, from arch/x86/include/asm/cpufeature.h:5, from arch/x86/include/asm/thread_info.h:53, from include/linux/thread_info.h:38, from arch/x86/include/asm/preempt.h:7, from include/linux/preempt.h:78, from include/linux/spinlock.h:51, from include/linux/seqlock.h:36, from include/linux/time.h:6, from include/linux/stat.h:19, from include/linux/module.h:10, from lib/crypto/sha256.c:16: include/asm-generic/atomic-instrumented.h:691:1: note: expected 'int *' but argument is of type 'u32 * {aka unsigned int *}' atomic_try_cmpxchg(atomic_t *v, int *old, int new) ^~~~~~~~~~~~~~~~~~ In file included from arch/x86/include/asm/bitops.h:16:0, from include/linux/bitops.h:19, from lib/crypto/sha256.c:14: include/asm-generic/qrwlock.h: In function 'queued_write_lock': include/asm-generic/qrwlock.h:92:53: warning: pointer targets in passing argument 2 of 'atomic_try_cmpxchg' differ in signedness [-Wpointer-sign] if (likely(atomic_try_cmpxchg_acquire(&lock->cnts, &cnts, _QW_LOCKED))) ^ include/linux/compiler.h:58:52: note: in definition of macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^~~~ >> include/asm-generic/qrwlock.h:92:2: note: in expansion of macro 'if' if (likely(atomic_try_cmpxchg_acquire(&lock->cnts, &cnts, _QW_LOCKED))) ^~ include/linux/compiler.h:45:22: note: in expansion of macro '__branch_check__' # define likely(x) (__branch_check__(x, 1, __builtin_constant_p(x))) ^~~~~~~~~~~~~~~~ include/asm-generic/qrwlock.h:92:6: note: in expansion of macro 'likely' if (likely(atomic_try_cmpxchg_acquire(&lock->cnts, &cnts, _QW_LOCKED))) ^~~~~~ In file included from arch/x86/include/asm/atomic.h:265:0, from include/linux/atomic.h:7, from include/linux/jump_label.h:249, from include/linux/static_key.h:1, from arch/x86/include/asm/nospec-branch.h:6, from arch/x86/include/asm/paravirt_types.h:46, from arch/x86/include/asm/ptrace.h:94, from arch/x86/include/asm/math_emu.h:5, from arch/x86/include/asm/processor.h:12, from arch/x86/include/asm/cpufeature.h:5, from arch/x86/include/asm/thread_info.h:53, from include/linux/thread_info.h:38, from arch/x86/include/asm/preempt.h:7, from include/linux/preempt.h:78, from include/linux/spinlock.h:51, from include/linux/seqlock.h:36, from include/linux/time.h:6, from include/linux/stat.h:19, from include/linux/module.h:10, from lib/crypto/sha256.c:16: include/asm-generic/atomic-instrumented.h:691:1: note: expected 'int *' but argument is of type 'u32 * {aka unsigned int *}' atomic_try_cmpxchg(atomic_t *v, int *old, int new) ^~~~~~~~~~~~~~~~~~ In file included from arch/x86/include/asm/bitops.h:16:0, from include/linux/bitops.h:19, from lib/crypto/sha256.c:14: include/asm-generic/qrwlock.h:92:53: warning: pointer targets in passing argument 2 of 'atomic_try_cmpxchg' differ in signedness [-Wpointer-sign] if (likely(atomic_try_cmpxchg_acquire(&lock->cnts, &cnts, _QW_LOCKED))) ^ include/linux/compiler.h:58:52: note: in definition of macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^~~~ >> include/asm-generic/qrwlock.h:92:2: note: in expansion of macro 'if' if (likely(atomic_try_cmpxchg_acquire(&lock->cnts, &cnts, _QW_LOCKED))) ^~ include/linux/compiler.h:45:22: note: in expansion of macro '__branch_check__' # define likely(x) (__branch_check__(x, 1, __builtin_constant_p(x))) ^~~~~~~~~~~~~~~~ include/asm-generic/qrwlock.h:92:6: note: in expansion of macro 'likely' if (likely(atomic_try_cmpxchg_acquire(&lock->cnts, &cnts, _QW_LOCKED))) ^~~~~~ In file included from arch/x86/include/asm/atomic.h:265:0, from include/linux/atomic.h:7, from include/linux/jump_label.h:249, from include/linux/static_key.h:1, from arch/x86/include/asm/nospec-branch.h:6, from arch/x86/include/asm/paravirt_types.h:46, from arch/x86/include/asm/ptrace.h:94, from arch/x86/include/asm/math_emu.h:5, from arch/x86/include/asm/processor.h:12, from arch/x86/include/asm/cpufeature.h:5, from arch/x86/include/asm/thread_info.h:53, from include/linux/thread_info.h:38, from arch/x86/include/asm/preempt.h:7, from include/linux/preempt.h:78, from include/linux/spinlock.h:51, from include/linux/seqlock.h:36, from include/linux/time.h:6, from include/linux/stat.h:19, from include/linux/module.h:10, from lib/crypto/sha256.c:16: include/asm-generic/atomic-instrumented.h:691:1: note: expected 'int *' but argument is of type 'u32 * {aka unsigned int *}' atomic_try_cmpxchg(atomic_t *v, int *old, int new) ^~~~~~~~~~~~~~~~~~ In file included from arch/x86/include/asm/bitops.h:16:0, from include/linux/bitops.h:19, from lib/crypto/sha256.c:14: include/asm-generic/qrwlock.h:92:53: warning: pointer targets in passing argument 2 of 'atomic_try_cmpxchg' differ in signedness [-Wpointer-sign] if (likely(atomic_try_cmpxchg_acquire(&lock->cnts, &cnts, _QW_LOCKED))) ^ include/linux/compiler.h:58:61: note: in definition of macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^~~~ >> include/asm-generic/qrwlock.h:92:2: note: in expansion of macro 'if' if (likely(atomic_try_cmpxchg_acquire(&lock->cnts, &cnts, _QW_LOCKED))) ^~ include/linux/compiler.h:45:22: note: in expansion of macro '__branch_check__' # define likely(x) (__branch_check__(x, 1, __builtin_constant_p(x))) ^~~~~~~~~~~~~~~~ include/asm-generic/qrwlock.h:92:6: note: in expansion of macro 'likely' if (likely(atomic_try_cmpxchg_acquire(&lock->cnts, &cnts, _QW_LOCKED))) ^~~~~~ In file included from arch/x86/include/asm/atomic.h:265:0, from include/linux/atomic.h:7, from include/linux/jump_label.h:249, from include/linux/static_key.h:1, from arch/x86/include/asm/nospec-branch.h:6, from arch/x86/include/asm/paravirt_types.h:46, from arch/x86/include/asm/ptrace.h:94, from arch/x86/include/asm/math_emu.h:5, from arch/x86/include/asm/processor.h:12, from arch/x86/include/asm/cpufeature.h:5, from arch/x86/include/asm/thread_info.h:53, from include/linux/thread_info.h:38, from arch/x86/include/asm/preempt.h:7, from include/linux/preempt.h:78, from include/linux/spinlock.h:51, from include/linux/seqlock.h:36, from include/linux/time.h:6, from include/linux/stat.h:19, from include/linux/module.h:10, from lib/crypto/sha256.c:16: include/asm-generic/atomic-instrumented.h:691:1: note: expected 'int *' but argument is of type 'u32 * {aka unsigned int *}' atomic_try_cmpxchg(atomic_t *v, int *old, int new) ^~~~~~~~~~~~~~~~~~ In file included from arch/x86/include/asm/bitops.h:16:0, from include/linux/bitops.h:19, from lib/crypto/sha256.c:14: include/asm-generic/qrwlock.h:92:53: warning: pointer targets in passing argument 2 of 'atomic_try_cmpxchg' differ in signedness [-Wpointer-sign] if (likely(atomic_try_cmpxchg_acquire(&lock->cnts, &cnts, _QW_LOCKED))) ^ include/linux/compiler.h:58:61: note: in definition of macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^~~~ >> include/asm-generic/qrwlock.h:92:2: note: in expansion of macro 'if' if (likely(atomic_try_cmpxchg_acquire(&lock->cnts, &cnts, _QW_LOCKED))) ^~ include/linux/compiler.h:45:22: note: in expansion of macro '__branch_check__' # define likely(x) (__branch_check__(x, 1, __builtin_constant_p(x))) ^~~~~~~~~~~~~~~~ include/asm-generic/qrwlock.h:92:6: note: in expansion of macro 'likely' if (likely(atomic_try_cmpxchg_acquire(&lock->cnts, &cnts, _QW_LOCKED))) ^~~~~~ In file included from arch/x86/include/asm/atomic.h:265:0, from include/linux/atomic.h:7, from include/linux/jump_label.h:249, from include/linux/static_key.h:1, from arch/x86/include/asm/nospec-branch.h:6, from arch/x86/include/asm/paravirt_types.h:46, from arch/x86/include/asm/ptrace.h:94, from arch/x86/include/asm/math_emu.h:5, from arch/x86/include/asm/processor.h:12, from arch/x86/include/asm/cpufeature.h:5, from arch/x86/include/asm/thread_info.h:53, from include/linux/thread_info.h:38, from arch/x86/include/asm/preempt.h:7, from include/linux/preempt.h:78, from include/linux/spinlock.h:51, from include/linux/seqlock.h:36, from include/linux/time.h:6, from include/linux/stat.h:19, from include/linux/module.h:10, from lib/crypto/sha256.c:16: include/asm-generic/atomic-instrumented.h:691:1: note: expected 'int *' but argument is of type 'u32 * {aka unsigned int *}' atomic_try_cmpxchg(atomic_t *v, int *old, int new) ^~~~~~~~~~~~~~~~~~ In file included from arch/x86/include/asm/bitops.h:16:0, from include/linux/bitops.h:19, from lib/crypto/sha256.c:14: include/asm-generic/qrwlock.h:92:53: warning: pointer targets in passing argument 2 of 'atomic_try_cmpxchg' differ in signedness [-Wpointer-sign] if (likely(atomic_try_cmpxchg_acquire(&lock->cnts, &cnts, _QW_LOCKED))) ^ include/linux/compiler.h:69:3: note: in definition of macro '__trace_if_value' (cond) ? \ ^~~~ include/linux/compiler.h:56:28: note: in expansion of macro '__trace_if_var' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^~~~~~~~~~~~~~ >> include/asm-generic/qrwlock.h:92:2: note: in expansion of macro 'if' if (likely(atomic_try_cmpxchg_acquire(&lock->cnts, &cnts, _QW_LOCKED))) ^~ include/linux/compiler.h:45:22: note: in expansion of macro '__branch_check__' # define likely(x) (__branch_check__(x, 1, __builtin_constant_p(x))) ^~~~~~~~~~~~~~~~ include/asm-generic/qrwlock.h:92:6: note: in expansion of macro 'likely' if (likely(atomic_try_cmpxchg_acquire(&lock->cnts, &cnts, _QW_LOCKED))) ^~~~~~ In file included from arch/x86/include/asm/atomic.h:265:0, from include/linux/atomic.h:7, from include/linux/jump_label.h:249, from include/linux/static_key.h:1, from arch/x86/include/asm/nospec-branch.h:6, from arch/x86/include/asm/paravirt_types.h:46, from arch/x86/include/asm/ptrace.h:94, from arch/x86/include/asm/math_emu.h:5, from arch/x86/include/asm/processor.h:12, from arch/x86/include/asm/cpufeature.h:5, from arch/x86/include/asm/thread_info.h:53, from include/linux/thread_info.h:38, from arch/x86/include/asm/preempt.h:7, from include/linux/preempt.h:78, from include/linux/spinlock.h:51, from include/linux/seqlock.h:36, from include/linux/time.h:6, from include/linux/stat.h:19, from include/linux/module.h:10, from lib/crypto/sha256.c:16: include/asm-generic/atomic-instrumented.h:691:1: note: expected 'int *' but argument is of type 'u32 * {aka unsigned int *}' atomic_try_cmpxchg(atomic_t *v, int *old, int new) ^~~~~~~~~~~~~~~~~~ In file included from arch/x86/include/asm/bitops.h:16:0, from include/linux/bitops.h:19, from lib/crypto/sha256.c:14: include/asm-generic/qrwlock.h:92:53: warning: pointer targets in passing argument 2 of 'atomic_try_cmpxchg' differ in signedness [-Wpointer-sign] if (likely(atomic_try_cmpxchg_acquire(&lock->cnts, &cnts, _QW_LOCKED))) ^ include/linux/compiler.h:69:3: note: in definition of macro '__trace_if_value' (cond) ? \ ^~~~ include/linux/compiler.h:56:28: note: in expansion of macro '__trace_if_var' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^~~~~~~~~~~~~~ >> include/asm-generic/qrwlock.h:92:2: note: in expansion of macro 'if' if (likely(atomic_try_cmpxchg_acquire(&lock->cnts, &cnts, _QW_LOCKED))) ^~ include/linux/compiler.h:45:22: note: in expansion of macro '__branch_check__' # define likely(x) (__branch_check__(x, 1, __builtin_constant_p(x))) ^~~~~~~~~~~~~~~~ include/asm-generic/qrwlock.h:92:6: note: in expansion of macro 'likely' if (likely(atomic_try_cmpxchg_acquire(&lock->cnts, &cnts, _QW_LOCKED))) ^~~~~~ In file included from arch/x86/include/asm/atomic.h:265:0, from include/linux/atomic.h:7, from include/linux/jump_label.h:249, from include/linux/static_key.h:1, from arch/x86/include/asm/nospec-branch.h:6, from arch/x86/include/asm/paravirt_types.h:46, from arch/x86/include/asm/ptrace.h:94, from arch/x86/include/asm/math_emu.h:5, from arch/x86/include/asm/processor.h:12, from arch/x86/include/asm/cpufeature.h:5, from arch/x86/include/asm/thread_info.h:53, from include/linux/thread_info.h:38, from arch/x86/include/asm/preempt.h:7, from include/linux/preempt.h:78, from include/linux/spinlock.h:51, from include/linux/seqlock.h:36, from include/linux/time.h:6, from include/linux/stat.h:19, from include/linux/module.h:10, from lib/crypto/sha256.c:16: include/asm-generic/atomic-instrumented.h:691:1: note: expected 'int *' but argument is of type 'u32 * {aka unsigned int *}' atomic_try_cmpxchg(atomic_t *v, int *old, int new) ^~~~~~~~~~~~~~~~~~ vim +/atomic_try_cmpxchg +65 include/asm-generic/qspinlock.h a33fda35e3a765 Waiman Long 2015-04-24 43 a33fda35e3a765 Waiman Long 2015-04-24 44 /** a33fda35e3a765 Waiman Long 2015-04-24 45 * queued_spin_is_contended - check if the lock is contended a33fda35e3a765 Waiman Long 2015-04-24 46 * @lock : Pointer to queued spinlock structure a33fda35e3a765 Waiman Long 2015-04-24 47 * Return: 1 if lock contended, 0 otherwise a33fda35e3a765 Waiman Long 2015-04-24 48 */ a33fda35e3a765 Waiman Long 2015-04-24 49 static __always_inline int queued_spin_is_contended(struct qspinlock *lock) a33fda35e3a765 Waiman Long 2015-04-24 50 { a33fda35e3a765 Waiman Long 2015-04-24 51 return atomic_read(&lock->val) & ~_Q_LOCKED_MASK; a33fda35e3a765 Waiman Long 2015-04-24 52 } a33fda35e3a765 Waiman Long 2015-04-24 53 /** a33fda35e3a765 Waiman Long 2015-04-24 54 * queued_spin_trylock - try to acquire the queued spinlock a33fda35e3a765 Waiman Long 2015-04-24 55 * @lock : Pointer to queued spinlock structure a33fda35e3a765 Waiman Long 2015-04-24 56 * Return: 1 if lock acquired, 0 if failed a33fda35e3a765 Waiman Long 2015-04-24 57 */ a33fda35e3a765 Waiman Long 2015-04-24 58 static __always_inline int queued_spin_trylock(struct qspinlock *lock) a33fda35e3a765 Waiman Long 2015-04-24 59 { 27df89689e257c Matthew Wilcox 2018-08-20 60 u32 val = atomic_read(&lock->val); 27df89689e257c Matthew Wilcox 2018-08-20 61 27df89689e257c Matthew Wilcox 2018-08-20 62 if (unlikely(val)) a33fda35e3a765 Waiman Long 2015-04-24 63 return 0; 27df89689e257c Matthew Wilcox 2018-08-20 64 27df89689e257c Matthew Wilcox 2018-08-20 @65 return likely(atomic_try_cmpxchg_acquire(&lock->val, &val, _Q_LOCKED_VAL)); a33fda35e3a765 Waiman Long 2015-04-24 66 } a33fda35e3a765 Waiman Long 2015-04-24 67 a33fda35e3a765 Waiman Long 2015-04-24 68 extern void queued_spin_lock_slowpath(struct qspinlock *lock, u32 val); a33fda35e3a765 Waiman Long 2015-04-24 69 a33fda35e3a765 Waiman Long 2015-04-24 70 /** a33fda35e3a765 Waiman Long 2015-04-24 71 * queued_spin_lock - acquire a queued spinlock a33fda35e3a765 Waiman Long 2015-04-24 72 * @lock: Pointer to queued spinlock structure a33fda35e3a765 Waiman Long 2015-04-24 73 */ a33fda35e3a765 Waiman Long 2015-04-24 74 static __always_inline void queued_spin_lock(struct qspinlock *lock) a33fda35e3a765 Waiman Long 2015-04-24 75 { 27df89689e257c Matthew Wilcox 2018-08-20 76 u32 val = 0; a33fda35e3a765 Waiman Long 2015-04-24 77 27df89689e257c Matthew Wilcox 2018-08-20 @78 if (likely(atomic_try_cmpxchg_acquire(&lock->val, &val, _Q_LOCKED_VAL))) a33fda35e3a765 Waiman Long 2015-04-24 79 return; 27df89689e257c Matthew Wilcox 2018-08-20 80 a33fda35e3a765 Waiman Long 2015-04-24 81 queued_spin_lock_slowpath(lock, val); a33fda35e3a765 Waiman Long 2015-04-24 82 } a33fda35e3a765 Waiman Long 2015-04-24 83 :::::: The code at line 65 was first introduced by commit :::::: 27df89689e257cccb604fdf56c91a75a25aa554a locking/spinlocks: Remove an instruction from spin and write locks :::::: TO: Matthew Wilcox <willy@xxxxxxxxxxxxx> :::::: CC: Ingo Molnar <mingo@xxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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