64b47e8fdb
When the system has only one CPU, lglock is effectively a spinlock; map it directly to spinlock to eliminate the indirection and duplicate code. In addition to removing overhead, this drops 1.6k of code with a defconfig modified to have !CONFIG_SMP, and 1.1k with a minimal config. Signed-off-by: Josh Triplett <josh@joshtriplett.org> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Michal Marek <mmarek@suse.cz> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: David Howells <dhowells@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Nick Piggin <npiggin@kernel.dk> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
28 lines
917 B
Makefile
28 lines
917 B
Makefile
|
|
obj-y += mutex.o semaphore.o rwsem.o mcs_spinlock.o
|
|
|
|
ifdef CONFIG_FUNCTION_TRACER
|
|
CFLAGS_REMOVE_lockdep.o = -pg
|
|
CFLAGS_REMOVE_lockdep_proc.o = -pg
|
|
CFLAGS_REMOVE_mutex-debug.o = -pg
|
|
CFLAGS_REMOVE_rtmutex-debug.o = -pg
|
|
endif
|
|
|
|
obj-$(CONFIG_DEBUG_MUTEXES) += mutex-debug.o
|
|
obj-$(CONFIG_LOCKDEP) += lockdep.o
|
|
ifeq ($(CONFIG_PROC_FS),y)
|
|
obj-$(CONFIG_LOCKDEP) += lockdep_proc.o
|
|
endif
|
|
obj-$(CONFIG_SMP) += spinlock.o
|
|
obj-$(CONFIG_SMP) += lglock.o
|
|
obj-$(CONFIG_PROVE_LOCKING) += spinlock.o
|
|
obj-$(CONFIG_RT_MUTEXES) += rtmutex.o
|
|
obj-$(CONFIG_DEBUG_RT_MUTEXES) += rtmutex-debug.o
|
|
obj-$(CONFIG_RT_MUTEX_TESTER) += rtmutex-tester.o
|
|
obj-$(CONFIG_DEBUG_SPINLOCK) += spinlock.o
|
|
obj-$(CONFIG_DEBUG_SPINLOCK) += spinlock_debug.o
|
|
obj-$(CONFIG_RWSEM_GENERIC_SPINLOCK) += rwsem-spinlock.o
|
|
obj-$(CONFIG_RWSEM_XCHGADD_ALGORITHM) += rwsem-xadd.o
|
|
obj-$(CONFIG_PERCPU_RWSEM) += percpu-rwsem.o
|
|
obj-$(CONFIG_LOCK_TORTURE_TEST) += locktorture.o
|