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| author | Oleg Nesterov <oleg@redhat.com> | 2012-12-17 16:01:39 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-12-17 17:15:18 -0800 |
| commit | 22b361d1df7bc25b558e52f22e779286a3d323e4 (patch) | |
| tree | a66c2e50d07d87e52dfc74a1e9118b2aff6759fe | |
| parent | 8ebe34731a0d1a9d89b536430afd98d0fadec99b (diff) | |
| download | linux-22b361d1df7bc25b558e52f22e779286a3d323e4.tar.gz linux-22b361d1df7bc25b558e52f22e779286a3d323e4.tar.bz2 linux-22b361d1df7bc25b558e52f22e779286a3d323e4.zip | |
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: Oleg 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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | arch/Kconfig | 1 | ||||
| -rw-r--r-- | block/Kconfig | 1 | ||||
| -rw-r--r-- | lib/Kconfig | 3 | ||||
| -rw-r--r-- | lib/Makefile | 3 |
4 files changed, 7 insertions, 1 deletions
diff --git a/arch/Kconfig b/arch/Kconfig index 34884faf98cd..54ffd0f9df21 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -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') diff --git a/block/Kconfig b/block/Kconfig index a7e40a7c8214..4a85ccf8d4cf 100644 --- a/block/Kconfig +++ b/block/Kconfig @@ -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. diff --git a/lib/Kconfig b/lib/Kconfig index 4b31a46fb307..75cdb77fa49d 100644 --- a/lib/Kconfig +++ b/lib/Kconfig @@ -42,6 +42,9 @@ config GENERIC_IO config STMP_DEVICE bool +config PERCPU_RWSEM + boolean + config CRC_CCITT tristate "CRC-CCITT functions" help diff --git a/lib/Makefile b/lib/Makefile index e959c20efb24..5558e35170cd 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -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 |