Commit 71c7356f authored by Tony Luck's avatar Tony Luck Committed by Linus Torvalds
Browse files

lockref: Implement lockref for Itanium 



All the cool kids are doing this, join in the fun.

Signed-off-by: default avatarTony Luck <tony.luck@intel.com>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 977dbfcf

arch/ia64/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -43,6 +43,7 @@ config IA64 
	select SYSCTL_ARCH_UNALIGN_NO_WARN

	select HAVE_MOD_ARCH_SPECIFIC

	select MODULES_USE_ELF_RELA

	select ARCH_USE_CMPXCHG_LOCKREF

	default y

	help

	  The Itanium Processor Family is Intel's 64-bit successor to

arch/ia64/include/asm/spinlock.h

+5 −0
Original line number Diff line number Diff line
@@ -102,6 +102,11 @@ static inline int __ticket_spin_is_contended(arch_spinlock_t *lock) 
	return ((tmp - (tmp >> TICKET_SHIFT)) & TICKET_MASK) > 1;

}



static __always_inline int arch_spin_value_unlocked(arch_spinlock_t lock)

{

	return !(((lock.lock >> TICKET_SHIFT) ^ lock.lock) & TICKET_MASK);

}



static inline int arch_spin_is_locked(arch_spinlock_t *lock)

{

	return __ticket_spin_is_locked(lock);