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Commit 22b361d1 authored by Oleg Nesterov's avatar Oleg Nesterov Committed by Linus Torvalds
Browse files

percpu_rw_semaphore: introduce CONFIG_PERCPU_RWSEM 



Currently only block_dev and uprobes use percpu_rw_semaphore,
add the config option selected by BLOCK || UPROBES.

Signed-off-by: default avatarOleg Nesterov <oleg@redhat.com>
Cc: Anton Arapov <anton@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Michal Marek <mmarek@suse.cz>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 8ebe3473

arch/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -80,6 +80,7 @@ config UPROBES 
	bool "Transparent user-space probes (EXPERIMENTAL)"

	depends on UPROBE_EVENT && PERF_EVENTS

	default n

	select PERCPU_RWSEM

	help

	  Uprobes is the user-space counterpart to kprobes: they

	  enable instrumentation applications (such as 'perf probe')

block/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -4,6 +4,7 @@ 
menuconfig BLOCK

       bool "Enable the block layer" if EXPERT

       default y

       select PERCPU_RWSEM

       help

	 Provide block layer support for the kernel.

lib/Kconfig

+3 −0
Original line number Diff line number Diff line
@@ -42,6 +42,9 @@ config GENERIC_IO 
config STMP_DEVICE

	bool



config PERCPU_RWSEM

	boolean



config CRC_CCITT

	tristate "CRC-CCITT functions"

	help

lib/Makefile

+2 −1
Original line number Diff line number Diff line
@@ -9,7 +9,7 @@ endif 


lib-y := ctype.o string.o vsprintf.o cmdline.o \

	 rbtree.o radix-tree.o dump_stack.o timerqueue.o\

	 idr.o int_sqrt.o extable.o percpu-rwsem.o \

	 idr.o int_sqrt.o extable.o \

	 sha1.o md5.o irq_regs.o reciprocal_div.o argv_split.o \

	 proportions.o flex_proportions.o prio_heap.o ratelimit.o show_mem.o \

	 is_single_threaded.o plist.o decompress.o kobject_uevent.o \
@@ -40,6 +40,7 @@ obj-$(CONFIG_DEBUG_LOCKING_API_SELFTESTS) += locking-selftest.o 
obj-$(CONFIG_DEBUG_SPINLOCK) += spinlock_debug.o

lib-$(CONFIG_RWSEM_GENERIC_SPINLOCK) += rwsem-spinlock.o

lib-$(CONFIG_RWSEM_XCHGADD_ALGORITHM) += rwsem.o

lib-$(CONFIG_PERCPU_RWSEM) += percpu-rwsem.o



CFLAGS_hweight.o = $(subst $(quote),,$(CONFIG_ARCH_HWEIGHT_CFLAGS))

obj-$(CONFIG_GENERIC_HWEIGHT) += hweight.o