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 <l...@intel.com>
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 <wi...@infradead.org>
:::::: CC: Ingo Molnar <mi...@kernel.org>
---
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https://lists.01.org/pipermail/kbuild-all Intel Corporation
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