From c39649c331c70952700f99832b03f87e9d7f5b4b Mon Sep 17 00:00:00 2001 From: Ben Hutchings Date: Wed, 19 Jan 2011 11:03:25 +0000 Subject: lib: cpu_rmap: CPU affinity reverse-mapping When initiating I/O on a multiqueue and multi-IRQ device, we may want to select a queue for which the response will be handled on the same or a nearby CPU. This requires a reverse-map of IRQ affinity. Add library functions to support a generic reverse-mapping from CPUs to objects with affinity and the specific case where the objects are IRQs. Signed-off-by: Ben Hutchings Signed-off-by: David S. Miller --- lib/Kconfig | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'lib/Kconfig') diff --git a/lib/Kconfig b/lib/Kconfig index 0ee67e08ad3..8334342e0d0 100644 --- a/lib/Kconfig +++ b/lib/Kconfig @@ -201,6 +201,10 @@ config DISABLE_OBSOLETE_CPUMASK_FUNCTIONS bool "Disable obsolete cpumask functions" if DEBUG_PER_CPU_MAPS depends on EXPERIMENTAL && BROKEN +config CPU_RMAP + bool + depends on SMP + # # Netlink attribute parsing support is select'ed if needed # -- cgit v1.2.3-70-g09d2 From a7a9a24dcd2c57edf148ca9a14a510a5765ecf20 Mon Sep 17 00:00:00 2001 From: Michael Buesch Date: Tue, 1 Mar 2011 20:03:05 +0100 Subject: lib-average: Make config option selectable Make CONFIG_AVERAGE selectable for out-of-tree users such as compat-wireless. Signed-off-by: Michael Buesch Signed-off-by: John W. Linville --- lib/Kconfig | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) (limited to 'lib/Kconfig') diff --git a/lib/Kconfig b/lib/Kconfig index 0ee67e08ad3..c70f2a4db35 100644 --- a/lib/Kconfig +++ b/lib/Kconfig @@ -217,6 +217,13 @@ config LRU_CACHE tristate config AVERAGE - bool + bool "Averaging functions" + help + This option is provided for the case where no in-kernel-tree + modules require averaging functions, but a module built outside + the kernel tree does. Such modules that use library averaging + functions require Y here. + + If unsure, say N. endmenu -- cgit v1.2.3-70-g09d2 From 0664996b7c2fdb1b7f90954469cc242274abd7db Mon Sep 17 00:00:00 2001 From: Akinobu Mita Date: Wed, 23 Mar 2011 16:41:59 -0700 Subject: bitops: introduce CONFIG_GENERIC_FIND_BIT_LE This introduces CONFIG_GENERIC_FIND_BIT_LE to tell whether to use generic implementation of find_*_bit_le() in lib/find_next_bit.c or not. For now we select CONFIG_GENERIC_FIND_BIT_LE for all architectures which enable CONFIG_GENERIC_FIND_NEXT_BIT. But m68knommu wants to define own faster find_next_zero_bit_le() and continues using generic find_next_{,zero_}bit(). (CONFIG_GENERIC_FIND_NEXT_BIT and !CONFIG_GENERIC_FIND_BIT_LE) Signed-off-by: Akinobu Mita Cc: Greg Ungerer Cc: Arnd Bergmann Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/frv/Kconfig | 4 ++++ arch/h8300/Kconfig | 4 ++++ arch/m32r/Kconfig | 4 ++++ arch/m68knommu/Kconfig | 4 ++++ arch/microblaze/Kconfig | 3 +++ arch/mips/Kconfig | 4 ++++ arch/parisc/Kconfig | 4 ++++ arch/powerpc/Kconfig | 4 ++++ arch/sh/Kconfig | 3 +++ arch/sparc/Kconfig | 4 ++++ arch/xtensa/Kconfig | 3 +++ lib/Kconfig | 3 +++ lib/Makefile | 1 + lib/find_next_bit.c | 3 +++ 14 files changed, 48 insertions(+) (limited to 'lib/Kconfig') diff --git a/arch/frv/Kconfig b/arch/frv/Kconfig index 747499a1b31..f6037b2da25 100644 --- a/arch/frv/Kconfig +++ b/arch/frv/Kconfig @@ -22,6 +22,10 @@ config GENERIC_FIND_NEXT_BIT bool default y +config GENERIC_FIND_BIT_LE + bool + default y + config GENERIC_HWEIGHT bool default y diff --git a/arch/h8300/Kconfig b/arch/h8300/Kconfig index 6df692d1475..9624db193e3 100644 --- a/arch/h8300/Kconfig +++ b/arch/h8300/Kconfig @@ -45,6 +45,10 @@ config GENERIC_FIND_NEXT_BIT bool default y +config GENERIC_FIND_BIT_LE + bool + default y + config GENERIC_HWEIGHT bool default y diff --git a/arch/m32r/Kconfig b/arch/m32r/Kconfig index ef4c1e442be..62afe23c9a4 100644 --- a/arch/m32r/Kconfig +++ b/arch/m32r/Kconfig @@ -260,6 +260,10 @@ config GENERIC_FIND_NEXT_BIT bool default y +config GENERIC_FIND_BIT_LE + bool + default y + config GENERIC_HWEIGHT bool default y diff --git a/arch/m68knommu/Kconfig b/arch/m68knommu/Kconfig index b5424cf948e..5795f58728c 100644 --- a/arch/m68knommu/Kconfig +++ b/arch/m68knommu/Kconfig @@ -42,6 +42,10 @@ config GENERIC_FIND_NEXT_BIT bool default y +config GENERIC_FIND_BIT_LE + bool + default y + config GENERIC_GPIO bool default n diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig index 922c4194c7b..5f0cf0e3265 100644 --- a/arch/microblaze/Kconfig +++ b/arch/microblaze/Kconfig @@ -37,6 +37,9 @@ config ARCH_HAS_ILOG2_U64 config GENERIC_FIND_NEXT_BIT def_bool y +config GENERIC_FIND_BIT_LE + def_bool y + config GENERIC_HWEIGHT def_bool y diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index d88983516e2..6e9811d40c9 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -777,6 +777,10 @@ config GENERIC_FIND_NEXT_BIT bool default y +config GENERIC_FIND_BIT_LE + bool + default y + config GENERIC_HWEIGHT bool default y diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig index fafdf30bea9..9b1f427cdc3 100644 --- a/arch/parisc/Kconfig +++ b/arch/parisc/Kconfig @@ -52,6 +52,10 @@ config GENERIC_FIND_NEXT_BIT bool default y +config GENERIC_FIND_BIT_LE + bool + default y + config GENERIC_BUG bool default y diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 71ba04721be..ce9ff55e102 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -95,6 +95,10 @@ config GENERIC_FIND_NEXT_BIT bool default y +config GENERIC_FIND_BIT_LE + bool + default y + config GENERIC_GPIO bool help diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig index 2d264fa8495..1fbf0c7583d 100644 --- a/arch/sh/Kconfig +++ b/arch/sh/Kconfig @@ -75,6 +75,9 @@ config GENERIC_CSUM config GENERIC_FIND_NEXT_BIT def_bool y +config GENERIC_FIND_BIT_LE + def_bool y + config GENERIC_HWEIGHT def_bool y diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig index e48f471be54..f766e6bf370 100644 --- a/arch/sparc/Kconfig +++ b/arch/sparc/Kconfig @@ -192,6 +192,10 @@ config GENERIC_FIND_NEXT_BIT bool default y +config GENERIC_FIND_BIT_LE + bool + default y + config GENERIC_HWEIGHT bool default y if !ULTRA_HAS_POPULATION_COUNT diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig index d373d159e75..72839190f50 100644 --- a/arch/xtensa/Kconfig +++ b/arch/xtensa/Kconfig @@ -21,6 +21,9 @@ config RWSEM_XCHGADD_ALGORITHM config GENERIC_FIND_NEXT_BIT def_bool y +config GENERIC_FIND_BIT_LE + def_bool y + config GENERIC_HWEIGHT def_bool y diff --git a/lib/Kconfig b/lib/Kconfig index 3a55a43c43e..23fa7a359db 100644 --- a/lib/Kconfig +++ b/lib/Kconfig @@ -22,6 +22,9 @@ config GENERIC_FIND_FIRST_BIT config GENERIC_FIND_NEXT_BIT bool +config GENERIC_FIND_BIT_LE + bool + config GENERIC_FIND_LAST_BIT bool default y diff --git a/lib/Makefile b/lib/Makefile index 8c9de027ebb..d7872b5c4c1 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -40,6 +40,7 @@ lib-$(CONFIG_RWSEM_GENERIC_SPINLOCK) += rwsem-spinlock.o lib-$(CONFIG_RWSEM_XCHGADD_ALGORITHM) += rwsem.o lib-$(CONFIG_GENERIC_FIND_FIRST_BIT) += find_next_bit.o lib-$(CONFIG_GENERIC_FIND_NEXT_BIT) += find_next_bit.o +lib-$(CONFIG_GENERIC_FIND_BIT_LE) += find_next_bit.o obj-$(CONFIG_GENERIC_FIND_LAST_BIT) += find_last_bit.o CFLAGS_hweight.o = $(subst $(quote),,$(CONFIG_ARCH_HWEIGHT_CFLAGS)) diff --git a/lib/find_next_bit.c b/lib/find_next_bit.c index 7667c3d907d..b0a8767282b 100644 --- a/lib/find_next_bit.c +++ b/lib/find_next_bit.c @@ -160,6 +160,7 @@ EXPORT_SYMBOL(find_first_zero_bit); #endif /* CONFIG_GENERIC_FIND_FIRST_BIT */ #ifdef __BIG_ENDIAN +#ifdef CONFIG_GENERIC_FIND_BIT_LE /* include/linux/byteorder does not support "unsigned long" type */ static inline unsigned long ext2_swabp(const unsigned long * x) @@ -273,4 +274,6 @@ found_middle_swap: return result + __ffs(ext2_swab(tmp)); } EXPORT_SYMBOL(find_next_bit_le); + +#endif /* CONFIG_GENERIC_FIND_BIT_LE */ #endif /* __BIG_ENDIAN */ -- cgit v1.2.3-70-g09d2