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linuxkpi: Add down_read_killable()

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Reviewed by:	hselasky
Differential Revision:	https://reviews.freebsd.org/D36528
Sponsored by:	Google, Inc. (GSoC 2022)
This commit is contained in:
Jake Freeland 2022-09-20 19:35:19 +02:00 committed by Emmanuel Vadot
parent 7cc3ea9c6f
commit f0b0f28f35
2 changed files with 15 additions and 0 deletions
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2
sys/compat/linuxkpi/common/include/linux/rwsem.h
View File

@ -46,6 +46,7 @@ struct rw_semaphore {
#define down_read(_rw) sx_slock(&(_rw)->sx)
#define up_read(_rw) sx_sunlock(&(_rw)->sx)
#define down_read_trylock(_rw) !!sx_try_slock(&(_rw)->sx)
#define down_read_killable(_rw) linux_down_read_killable(_rw)
#define down_write_trylock(_rw) !!sx_try_xlock(&(_rw)->sx)
#define down_write_killable(_rw) linux_down_write_killable(_rw)
#define downgrade_write(_rw) sx_downgrade(&(_rw)->sx)
@ -80,6 +81,7 @@ linux_init_rwsem(struct rw_semaphore *rw, const char *name)
sx_init_flags(&rw->sx, name, SX_NOWITNESS);
}
extern int linux_down_read_killable(struct rw_semaphore *);
extern int linux_down_write_killable(struct rw_semaphore *);
#endif /* _LINUXKPI_LINUX_RWSEM_H_ */

13
sys/compat/linuxkpi/common/src/linux_lock.c
View File

@ -159,6 +159,19 @@ linux_mutex_lock_interruptible(mutex_t *m)
return (error);
}
int
linux_down_read_killable(struct rw_semaphore *rw)
{
int error;
error = -sx_slock_sig(&rw->sx);
if (error != 0) {
linux_schedule_save_interrupt_value(current, error);
error = -EINTR;
}
return (error);
}
int
linux_down_write_killable(struct rw_semaphore *rw)
{