diff options
| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2017-06-30 01:53:02 +0300 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2017-08-17 18:08:59 +0300 |
| commit | 952111d7db02573e7165e338de8d4871fa447b21 (patch) | |
| tree | 9b66fe680204959a22ef8cf72c97180de2a6643b /arch/arm/include/asm/spinlock.h | |
| parent | d3a024abbc438277851c510b51ec9b158821488b (diff) | |
| download | linux-952111d7db02573e7165e338de8d4871fa447b21.tar.xz | |
arch: Remove spin_unlock_wait() arch-specific definitions
There is no agreed-upon definition of spin_unlock_wait()'s semantics,
and it appears that all callers could do just as well with a lock/unlock
pair. This commit therefore removes the underlying arch-specific
arch_spin_unlock_wait() for all architectures providing them.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: <linux-arch@vger.kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Andrea Parri <parri.andrea@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Acked-by: Will Deacon <will.deacon@arm.com>
Acked-by: Boqun Feng <boqun.feng@gmail.com>
Diffstat (limited to 'arch/arm/include/asm/spinlock.h')
| -rw-r--r-- | arch/arm/include/asm/spinlock.h | 16 |
1 files changed, 0 insertions, 16 deletions
diff --git a/arch/arm/include/asm/spinlock.h b/arch/arm/include/asm/spinlock.h index 4bec45442072..c030143c18c6 100644 --- a/arch/arm/include/asm/spinlock.h +++ b/arch/arm/include/asm/spinlock.h @@ -52,22 +52,6 @@ static inline void dsb_sev(void) * memory. */ -static inline void arch_spin_unlock_wait(arch_spinlock_t *lock) -{ - u16 owner = READ_ONCE(lock->tickets.owner); - - for (;;) { - arch_spinlock_t tmp = READ_ONCE(*lock); - - if (tmp.tickets.owner == tmp.tickets.next || - tmp.tickets.owner != owner) - break; - - wfe(); - } - smp_acquire__after_ctrl_dep(); -} - #define arch_spin_lock_flags(lock, flags) arch_spin_lock(lock) static inline void arch_spin_lock(arch_spinlock_t *lock) |