mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
synced 2026-11-06 09:33:20 +01:00
Josh Triplett
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 <[email protected]> Cc: Rusty Russell <[email protected]> Cc: Michal Marek <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: David Howells <[email protected]> Cc: "H. Peter Anvin" <[email protected]> Cc: Nick Piggin <[email protected]> Cc: Peter Zijlstra <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
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
|