mirrors
/
linux-stable
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
1
0
Fork 0
Code Issues Releases Wiki Activity

seqcount: Compress SEQCNT_LOCKNAME_ZERO() 

Less is more.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
This commit is contained in:
Peter Zijlstra 2020-07-23 12:03:13 +02:00
parent e4e9ab3f9f
commit 0efc94c5d1
1 changed files with 18 additions and 45 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

63
include/linux/seqlock.h
View File

@ -138,51 +138,6 @@ static inline void seqcount_lockdep_reader_access(const seqcount_t *s)
#define __SEQ_LOCK(expr)
#endif
#define SEQCOUNT_LOCKTYPE_ZERO(seq_name, assoc_lock) { \
.seqcount = SEQCNT_ZERO(seq_name.seqcount), \
__SEQ_LOCK(.lock = (assoc_lock)) \
}
/**
* SEQCNT_SPINLOCK_ZERO - static initializer for seqcount_spinlock_t
* @name: Name of the seqcount_spinlock_t instance
* @lock: Pointer to the associated spinlock
*/
#define SEQCNT_SPINLOCK_ZERO(name, lock) \
SEQCOUNT_LOCKTYPE_ZERO(name, lock)
/**
* SEQCNT_RAW_SPINLOCK_ZERO - static initializer for seqcount_raw_spinlock_t
* @name: Name of the seqcount_raw_spinlock_t instance
* @lock: Pointer to the associated raw_spinlock
*/
#define SEQCNT_RAW_SPINLOCK_ZERO(name, lock) \
SEQCOUNT_LOCKTYPE_ZERO(name, lock)
/**
* SEQCNT_RWLOCK_ZERO - static initializer for seqcount_rwlock_t
* @name: Name of the seqcount_rwlock_t instance
* @lock: Pointer to the associated rwlock
*/
#define SEQCNT_RWLOCK_ZERO(name, lock) \
SEQCOUNT_LOCKTYPE_ZERO(name, lock)
/**
* SEQCNT_MUTEX_ZERO - static initializer for seqcount_mutex_t
* @name: Name of the seqcount_mutex_t instance
* @lock: Pointer to the associated mutex
*/
#define SEQCNT_MUTEX_ZERO(name, lock) \
SEQCOUNT_LOCKTYPE_ZERO(name, lock)
/**
* SEQCNT_WW_MUTEX_ZERO - static initializer for seqcount_ww_mutex_t
* @name: Name of the seqcount_ww_mutex_t instance
* @lock: Pointer to the associated ww_mutex
*/
#define SEQCNT_WW_MUTEX_ZERO(name, lock) \
SEQCOUNT_LOCKTYPE_ZERO(name, lock)
/**
* typedef seqcount_LOCKNAME_t - sequence counter with LOCKTYPR associated
* @seqcount: The real sequence counter
@ -263,6 +218,24 @@ SEQCOUNT_LOCKTYPE(rwlock_t, rwlock, false, s->lock)
SEQCOUNT_LOCKTYPE(struct mutex, mutex, true, s->lock)
SEQCOUNT_LOCKTYPE(struct ww_mutex, ww_mutex, true, &s->lock->base)
/**
* SEQCNT_LOCKNAME_ZERO - static initializer for seqcount_LOCKNAME_t
* @name: Name of the seqcount_LOCKNAME_t instance
* @lock: Pointer to the associated LOCKTYPE
*/
#define SEQCOUNT_LOCKTYPE_ZERO(seq_name, assoc_lock) { \
.seqcount = SEQCNT_ZERO(seq_name.seqcount), \
__SEQ_LOCK(.lock = (assoc_lock)) \
}
#define SEQCNT_SPINLOCK_ZERO(name, lock) SEQCOUNT_LOCKTYPE_ZERO(name, lock)
#define SEQCNT_RAW_SPINLOCK_ZERO(name, lock) SEQCOUNT_LOCKTYPE_ZERO(name, lock)
#define SEQCNT_RWLOCK_ZERO(name, lock) SEQCOUNT_LOCKTYPE_ZERO(name, lock)
#define SEQCNT_MUTEX_ZERO(name, lock) SEQCOUNT_LOCKTYPE_ZERO(name, lock)
#define SEQCNT_WW_MUTEX_ZERO(name, lock) SEQCOUNT_LOCKTYPE_ZERO(name, lock)
#define __seqprop_case(s, lockname, prop) \
seqcount_##lockname##_t: __seqcount_##lockname##_##prop((void *)(s))