tree: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git WIP.locking/core head: 5c587ed687faed2eb0afdd669ddd167d0d940236 commit: 0d8bd477cd9602fb18bee6e3dae41c5fda9cebab [28/29] locking/rwsem: Merge owner into count on x86-64 config: riscv-tinyconfig (attached as .config) compiler: riscv64-linux-gcc (GCC) 8.1.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 0d8bd477cd9602fb18bee6e3dae41c5fda9cebab # save the attached .config to linux build tree GCC_VERSION=8.1.0 make.cross ARCH=riscv
All errors (new ones prefixed by >>):
In file included from include/linux/kernel.h:11,
from kernel/locking/rwsem.c:9:
kernel/locking/rwsem.h: In function 'rwsem_set_nonspinnable':
kernel/locking/rwsem.h:333:34: error: 'struct rw_semaphore' has no member
named 'owner'
long owner = (long)READ_ONCE(sem->owner);
^~
include/linux/compiler.h:255:17: note: in definition of macro '__READ_ONCE'
union { typeof(x) __val; char __c[1]; } __u; \
^
kernel/locking/rwsem.h:333:21: note: in expansion of macro 'READ_ONCE'
long owner = (long)READ_ONCE(sem->owner);
^~~~~~~~~
kernel/locking/rwsem.h:333:34: error: 'struct rw_semaphore' has no member
named 'owner'
long owner = (long)READ_ONCE(sem->owner);
^~
include/linux/compiler.h:257:22: note: in definition of macro '__READ_ONCE'
__read_once_size(&(x), __u.__c, sizeof(x)); \
^
kernel/locking/rwsem.h:333:21: note: in expansion of macro 'READ_ONCE'
long owner = (long)READ_ONCE(sem->owner);
^~~~~~~~~
kernel/locking/rwsem.h:333:34: error: 'struct rw_semaphore' has no member
named 'owner'
long owner = (long)READ_ONCE(sem->owner);
^~
include/linux/compiler.h:257:42: note: in definition of macro '__READ_ONCE'
__read_once_size(&(x), __u.__c, sizeof(x)); \
^
kernel/locking/rwsem.h:333:21: note: in expansion of macro 'READ_ONCE'
long owner = (long)READ_ONCE(sem->owner);
^~~~~~~~~
kernel/locking/rwsem.h:333:34: error: 'struct rw_semaphore' has no member
named 'owner'
long owner = (long)READ_ONCE(sem->owner);
^~
include/linux/compiler.h:259:30: note: in definition of macro '__READ_ONCE'
__read_once_size_nocheck(&(x), __u.__c, sizeof(x)); \
^
kernel/locking/rwsem.h:333:21: note: in expansion of macro 'READ_ONCE'
long owner = (long)READ_ONCE(sem->owner);
^~~~~~~~~
kernel/locking/rwsem.h:333:34: error: 'struct rw_semaphore' has no member
named 'owner'
long owner = (long)READ_ONCE(sem->owner);
^~
include/linux/compiler.h:259:50: note: in definition of macro '__READ_ONCE'
__read_once_size_nocheck(&(x), __u.__c, sizeof(x)); \
^
kernel/locking/rwsem.h:333:21: note: in expansion of macro 'READ_ONCE'
long owner = (long)READ_ONCE(sem->owner);
^~~~~~~~~
In file included from kernel/locking/rwsem.c:16:
>> kernel/locking/rwsem.h:335:9: error: implicit declaration of function
>> 'is_rwsem_owner_reader'; did you mean 'rwsem_owner_count'?
>> [-Werror=implicit-function-declaration]
while (is_rwsem_owner_reader((struct task_struct *)owner)) {
^~~~~~~~~~~~~~~~~~~~~
rwsem_owner_count
kernel/locking/rwsem.h:336:8: error: implicit declaration of function
'is_rwsem_owner_spinnable'; did you mean 'rwsem_set_nonspinnable'?
[-Werror=implicit-function-declaration]
if (!is_rwsem_owner_spinnable((struct task_struct *)owner))
^~~~~~~~~~~~~~~~~~~~~~~~
rwsem_set_nonspinnable
In file included from arch/riscv/include/asm/atomic.h:23,
from include/linux/atomic.h:7,
from include/linux/rcupdate.h:25,
from include/linux/rculist.h:11,
from include/linux/pid.h:5,
from include/linux/sched.h:14,
from kernel/locking/rwsem.c:10:
kernel/locking/rwsem.h:338:31: error: 'struct rw_semaphore' has no member
named 'owner'
owner = cmpxchg((long *)&sem->owner, owner,
^~
arch/riscv/include/asm/cmpxchg.h:350:15: note: in definition of macro
'cmpxchg'
__typeof__(*(ptr)) _o_ = (o); \
^~~
kernel/locking/rwsem.h:338:31: error: 'struct rw_semaphore' has no member
named 'owner'
owner = cmpxchg((long *)&sem->owner, owner,
^~
arch/riscv/include/asm/cmpxchg.h:351:15: note: in definition of macro
'cmpxchg'
__typeof__(*(ptr)) _n_ = (n); \
^~~
kernel/locking/rwsem.h:338:31: error: 'struct rw_semaphore' has no member
named 'owner'
owner = cmpxchg((long *)&sem->owner, owner,
^~
arch/riscv/include/asm/cmpxchg.h:352:16: note: in definition of macro
'cmpxchg'
(__typeof__(*(ptr))) __cmpxchg((ptr), \
^~~
kernel/locking/rwsem.h:338:31: error: 'struct rw_semaphore' has no member
named 'owner'
owner = cmpxchg((long *)&sem->owner, owner,
^~
arch/riscv/include/asm/cmpxchg.h:312:13: note: in definition of macro
'__cmpxchg'
__typeof__(ptr) __ptr = (ptr); \
^~~
kernel/locking/rwsem.h:338:11: note: in expansion of macro 'cmpxchg'
owner = cmpxchg((long *)&sem->owner, owner,
^~~~~~~
kernel/locking/rwsem.h:338:31: error: 'struct rw_semaphore' has no member
named 'owner'
owner = cmpxchg((long *)&sem->owner, owner,
^~
arch/riscv/include/asm/cmpxchg.h:312:27: note: in definition of macro
'__cmpxchg'
__typeof__(ptr) __ptr = (ptr); \
^~~
kernel/locking/rwsem.h:338:11: note: in expansion of macro 'cmpxchg'
owner = cmpxchg((long *)&sem->owner, owner,
^~~~~~~
kernel/locking/rwsem.h:338:31: error: 'struct rw_semaphore' has no member
named 'owner'
owner = cmpxchg((long *)&sem->owner, owner,
^~
arch/riscv/include/asm/cmpxchg.h:313:15: note: in definition of macro
'__cmpxchg'
__typeof__(*(ptr)) __old = (old); \
^~~
kernel/locking/rwsem.h:338:11: note: in expansion of macro 'cmpxchg'
owner = cmpxchg((long *)&sem->owner, owner,
^~~~~~~
kernel/locking/rwsem.h:338:31: error: 'struct rw_semaphore' has no member
named 'owner'
owner = cmpxchg((long *)&sem->owner, owner,
^~
arch/riscv/include/asm/cmpxchg.h:314:15: note: in definition of macro
'__cmpxchg'
__typeof__(*(ptr)) __new = (new); \
^~~
kernel/locking/rwsem.h:338:11: note: in expansion of macro 'cmpxchg'
owner = cmpxchg((long *)&sem->owner, owner,
^~~~~~~
kernel/locking/rwsem.h:338:31: error: 'struct rw_semaphore' has no member
named 'owner'
owner = cmpxchg((long *)&sem->owner, owner,
^~
arch/riscv/include/asm/cmpxchg.h:315:15: note: in definition of macro
'__cmpxchg'
__typeof__(*(ptr)) __ret; \
^~~
kernel/locking/rwsem.h:338:11: note: in expansion of macro 'cmpxchg'
owner = cmpxchg((long *)&sem->owner, owner,
^~~~~~~
kernel/locking/rwsem.h:338:31: error: 'struct rw_semaphore' has no member
named 'owner'
owner = cmpxchg((long *)&sem->owner, owner,
^~
arch/riscv/include/asm/cmpxchg.h:317:10: note: in definition of macro
'__cmpxchg'
switch (size) { \
^~~~
kernel/locking/rwsem.h:338:11: note: in expansion of macro 'cmpxchg'
owner = cmpxchg((long *)&sem->owner, owner,
^~~~~~~
arch/riscv/include/asm/cmpxchg.h:326:41: error: invalid type argument of
unary '*' (have 'int')
: "=&r" (__ret), "=&r" (__rc), "+A" (*__ptr) \
^~~~~~
arch/riscv/include/asm/cmpxchg.h:352:23: note: in expansion of macro
'__cmpxchg'
(__typeof__(*(ptr))) __cmpxchg((ptr), \
^~~~~~~~~
kernel/locking/rwsem.h:338:11: note: in expansion of macro 'cmpxchg'
owner = cmpxchg((long *)&sem->owner, owner,
^~~~~~~
arch/riscv/include/asm/cmpxchg.h:338:41: error: invalid type argument of
unary '*' (have 'int')
: "=&r" (__ret), "=&r" (__rc), "+A" (*__ptr) \
^~~~~~
arch/riscv/include/asm/cmpxchg.h:352:23: note: in expansion of macro
'__cmpxchg'
(__typeof__(*(ptr))) __cmpxchg((ptr), \
vim +335 kernel/locking/rwsem.h
12a30a7f Waiman Long 2019-04-04 326
46ad0840 Waiman Long 2019-03-22 327 /*
2d6f2f61 Waiman Long 2019-04-05 328 * Set the RWSEM_ANONYMOUSLY_OWNED flag
if the RWSEM_READER_OWNED flag
2d6f2f61 Waiman Long 2019-04-05 329 * remains set. Otherwise, the operation
will be aborted.
2d6f2f61 Waiman Long 2019-04-05 330 */
2d6f2f61 Waiman Long 2019-04-05 331 static inline void
rwsem_set_nonspinnable(struct rw_semaphore *sem)
2d6f2f61 Waiman Long 2019-04-05 332 {
2d6f2f61 Waiman Long 2019-04-05 @333 long owner =
(long)READ_ONCE(sem->owner);
2d6f2f61 Waiman Long 2019-04-05 334
2d6f2f61 Waiman Long 2019-04-05 @335 while (is_rwsem_owner_reader((struct
task_struct *)owner)) {
2d6f2f61 Waiman Long 2019-04-05 336 if
(!is_rwsem_owner_spinnable((struct task_struct *)owner))
2d6f2f61 Waiman Long 2019-04-05 337 break;
2d6f2f61 Waiman Long 2019-04-05 338 owner = cmpxchg((long
*)&sem->owner, owner,
2d6f2f61 Waiman Long 2019-04-05 339 owner |
RWSEM_ANONYMOUSLY_OWNED);
2d6f2f61 Waiman Long 2019-04-05 340 }
2d6f2f61 Waiman Long 2019-04-05 341 }
2d6f2f61 Waiman Long 2019-04-05 342
:::::: The code at line 335 was first introduced by commit
:::::: 2d6f2f61367455179ee140b3d4af6974d3e5d06d locking/rwsem: Enable
time-based spinning on reader-owned rwsem
:::::: TO: Waiman Long <[email protected]>
:::::: CC: Ingo Molnar <[email protected]>
---
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