*** last posting didn't make it out to the lists *** These patches introduce 2 new barrier primitives: smp_load_acquire(p) smp_store_release(p, v) See the first patch, which changes Documentation/memory-barriers.txt, to find the exact definitions of what an ACQUIRE/RELEASE barrier is -- previously known as LOCK/UNLOCK barriers. The second patch simplifies the asm/barrier.h implementation of a lot of architectures by using asm-generic/barrier.h in order to save a lot of code duplication later on. The third patch adds the new barrier primitives. The fourth adds the first user. Build tested for: alpha-defconfig - OK ia64-defconfig - OK m32r-defconfig - OK frv-defconfig - OK m68k-defconfig - OK mips-defconfig - OK mips-fuloong2e_defconfig - OK arm-defconfig - OK blackfin-defconfig - OK mn10300-defconfig - OK powerpc-ppc40x_defconfig - OK powerpc-defconfig - OK s390-defconfig - OK sh-defconfig - OK sparc-defconfig - OK sparc64-defconfig - OK i386-defconfig - OK x86_64-defconfig - OK Changes since the last posting that didn't make it out to lkml (and other lists) due to an excessive Cc list: - added the fourth patch as a first user - changed the x86 implementation to not assume a TSO model when OOSTORE or PPRO_FENCE --- Documentation/memory-barriers.txt | 164 ++++++++++++++++++---------------- arch/alpha/include/asm/barrier.h | 25 ++---- arch/arc/include/asm/Kbuild | 1 + arch/arc/include/asm/atomic.h | 5 ++ arch/arc/include/asm/barrier.h | 42 --------- arch/arm/include/asm/barrier.h | 15 ++++ arch/arm64/include/asm/barrier.h | 50 +++++++++++ arch/avr32/include/asm/barrier.h | 17 ++-- arch/blackfin/include/asm/barrier.h | 18 +--- arch/cris/include/asm/Kbuild | 1 + arch/cris/include/asm/barrier.h | 25 ------ arch/frv/include/asm/barrier.h | 8 +- arch/h8300/include/asm/barrier.h | 21 +---- arch/hexagon/include/asm/Kbuild | 1 + arch/hexagon/include/asm/barrier.h | 41 --------- arch/ia64/include/asm/barrier.h | 49 ++++++++++ arch/m32r/include/asm/barrier.h | 80 +---------------- arch/m68k/include/asm/barrier.h | 14 +-- arch/metag/include/asm/barrier.h | 15 ++++ arch/microblaze/include/asm/Kbuild | 1 + arch/microblaze/include/asm/barrier.h | 27 ------ arch/mips/include/asm/barrier.h | 15 ++++ arch/mn10300/include/asm/Kbuild | 1 + arch/mn10300/include/asm/barrier.h | 37 -------- arch/parisc/include/asm/Kbuild | 1 + arch/parisc/include/asm/barrier.h | 35 -------- arch/powerpc/include/asm/barrier.h | 21 ++++- arch/s390/include/asm/barrier.h | 15 ++++ arch/score/include/asm/Kbuild | 1 + arch/score/include/asm/barrier.h | 16 ---- arch/sh/include/asm/barrier.h | 21 +---- arch/sparc/include/asm/barrier_32.h | 12 +-- arch/sparc/include/asm/barrier_64.h | 15 ++++ arch/tile/include/asm/barrier.h | 68 +------------- arch/unicore32/include/asm/barrier.h | 11 +-- arch/x86/include/asm/barrier.h | 43 ++++++++- arch/xtensa/include/asm/barrier.h | 9 +- include/asm-generic/barrier.h | 55 +++++++++--- include/linux/compiler.h | 9 ++ kernel/events/ring_buffer.c | 62 +++++++------ 40 files changed, 444 insertions(+), 623 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
