The patch titled
Subject: percpu_rw_semaphore: introduce CONFIG_PERCPU_RWSEM
has been added to the -mm tree. Its filename is
percpu_rw_semaphore-introduce-config_percpu_rwsem.patch
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------------------------------------------------------
From: Oleg Nesterov <oleg@xxxxxxxxxx>
Subject: 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@xxxxxxxxxx>
Cc: Anton Arapov <anton@xxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Michal Marek <mmarek@xxxxxxx>
Cc: Mikulas Patocka <mpatocka@xxxxxxxxxx>
Cc: "Paul E. McKenney" <paulmck@xxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Srikar Dronamraju <srikar@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/Kconfig | 1 +
block/Kconfig | 1 +
lib/Kconfig | 3 +++
lib/Makefile | 3 ++-
4 files changed, 7 insertions(+), 1 deletion(-)
diff -puN arch/Kconfig~percpu_rw_semaphore-introduce-config_percpu_rwsem arch/Kconfig
--- a/arch/Kconfig~percpu_rw_semaphore-introduce-config_percpu_rwsem
+++ a/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 -puN block/Kconfig~percpu_rw_semaphore-introduce-config_percpu_rwsem block/Kconfig
--- a/block/Kconfig~percpu_rw_semaphore-introduce-config_percpu_rwsem
+++ a/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 -puN lib/Kconfig~percpu_rw_semaphore-introduce-config_percpu_rwsem lib/Kconfig
--- a/lib/Kconfig~percpu_rw_semaphore-introduce-config_percpu_rwsem
+++ a/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 -puN lib/Makefile~percpu_rw_semaphore-introduce-config_percpu_rwsem lib/Makefile
--- a/lib/Makefile~percpu_rw_semaphore-introduce-config_percpu_rwsem
+++ a/lib/Makefile
@@ -12,7 +12,7 @@ lib-y := ctype.o string.o vsprintf.o cmd
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 earlycpio.o percpu-rwsem.o
+ is_single_threaded.o plist.o decompress.o earlycpio.o
lib-$(CONFIG_MMU) += ioremap.o
lib-$(CONFIG_SMP) += cpumask.o
@@ -40,6 +40,7 @@ obj-$(CONFIG_DEBUG_LOCKING_API_SELFTESTS
obj-$(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
_
Patches currently in -mm which might be from oleg@xxxxxxxxxx are
linux-next.patch
mm-oom-change-type-of-oom_score_adj-to-short.patch
mm-oom-fix-race-when-specifying-a-thread-as-the-oom-origin.patch
percpu_rw_semaphore-reimplement-to-not-block-the-readers-unnecessarily.patch
percpu_rw_semaphore-reimplement-to-not-block-the-readers-unnecessari-lyfix.patch
percpu_rw_semaphore-kill-writer_mutex-add-write_ctr.patch
percpu_rw_semaphore-add-the-lockdep-annotations.patch
percpu_rw_semaphore-introduce-config_percpu_rwsem.patch
uprobes-use-percpu_rw_semaphore-to-fix-register-unregister-vs-dup_mmap-race.patch
ptrace-introduce-ptrace_o_exitkill.patch
procfs-add-ability-to-plug-in-auxiliary-fdinfo-providers.patch
fs-eventfd-add-procfs-fdinfo-helper.patch
fs-epoll-add-procfs-fdinfo-helper-v2.patch
fdinfo-show-sigmask-for-signalfd-fd-v3.patch
fs-exportfs-escape-nil-dereference-if-no-s_export_op-present.patch
fs-exportfs-add-exportfs_encode_inode_fh-helper.patch
fs-notify-add-procfs-fdinfo-helper-v6.patch
fs-notify-add-procfs-fdinfo-helper-v6-fix.patch
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