Linus Torvalds 60815cf2e0 kernel: Provide READ_ONCE and ASSIGN_ONCE ... As discussed on LKML http://marc.info/?i=54611D86.4040306%40de.ibm.com ACCESS_ONCE might fail with specific compilers for non-scalar accesses. Here is a set of patches to tackle that problem. The first patch introduce READ_ONCE and ASSIGN_ONCE. If the data structure is larger than the machine word size memcpy is used and a warning is emitted. The next patches fix up several in-tree users of ACCESS_ONCE on non-scalar types. This merge does not yet contain a patch that forces ACCESS_ONCE to work only on scalar types. This is targetted for the next merge window as Linux next already contains new offenders regarding ACCESS_ONCE vs. non-scalar types. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.14 (GNU/Linux) iQIcBAABAgAGBQJUkrVGAAoJEBF7vIC1phx8stkP/2LmN5y6LOseoEW06xa5MX4m cbIKsZNtsGHl7EDcTzzuWs6Sq5/Cj7V3yzeBF7QGbUKOqvFWU3jvpUBCCfjMg37C 77/Vf0ZPrxTXXxeJ4Ykdy2CGvuMtuYY9TWkrRNKmLU0xex7lGblEzCt9z6+mZviw 26/DN8ctjkHRvIUAi+7RfQBBc3oSMYAC1mzxYKBAsAFLV+LyFmsGU/4iofZMAsdt XFyVXlrLn0Bjx/MeceGkOlMDiVx4FnfccfFaD4hhuTLBJXWitkUK/MRa4JBiXWzH agY8942A8/j9wkI2DFp/pqZYqA/sTXLndyOWlhE//ZSti0n0BSJaOx3S27rTLkAc 5VmZEVyIrS3hyOpyyAi0sSoPkDnjeCHmQg9Rqn34/poKLd7JDrW2UkERNCf/T3eh GI2rbhAlZz3v5mIShn8RrxzslWYmOObpMr3HYNUdRk8YUfTf6d6aZ3txHp2nP4mD VBAEzsvP9rcVT2caVhU2dnBzeaZAj3zeDxBtjcb3X2osY9tI7qgLc9Fa/fWKgILk 2evkLcctsae2mlLNGHyaK3Dm/ZmYJv+57MyaQQEZNfZZgeB1y4k0DkxH4w1CFmCi s8XlH5voEHgnyjSQXXgc/PNVlkPAKr78ZyTiAfiKmh8rpe41/W4hGcgao7L9Lgiu SI0uSwKibuZt4dHGxQuG =IQ5o -----END PGP SIGNATURE----- Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/borntraeger/linux Pull ACCESS_ONCE cleanup preparation from Christian Borntraeger: "kernel: Provide READ_ONCE and ASSIGN_ONCE As discussed on LKML http://marc.info/?i=54611D86.4040306%40de.ibm.com ACCESS_ONCE might fail with specific compilers for non-scalar accesses. Here is a set of patches to tackle that problem. The first patch introduce READ_ONCE and ASSIGN_ONCE. If the data structure is larger than the machine word size memcpy is used and a warning is emitted. The next patches fix up several in-tree users of ACCESS_ONCE on non-scalar types. This does not yet contain a patch that forces ACCESS_ONCE to work only on scalar types. This is targetted for the next merge window as Linux next already contains new offenders regarding ACCESS_ONCE vs. non-scalar types" * tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/borntraeger/linux: s390/kvm: REPLACE barrier fixup with READ_ONCE arm/spinlock: Replace ACCESS_ONCE with READ_ONCE arm64/spinlock: Replace ACCESS_ONCE READ_ONCE mips/gup: Replace ACCESS_ONCE with READ_ONCE x86/gup: Replace ACCESS_ONCE with READ_ONCE x86/spinlock: Replace ACCESS_ONCE with READ_ONCE mm: replace ACCESS_ONCE with READ_ONCE or barriers kernel: Provide READ_ONCE and ASSIGN_ONCE		2014-12-20 16:48:59 -08:00
..
boot	Please consider pulling the clk framework changes toward 3.19. It is	2014-12-20 16:42:36 -08:00
common	Driver core patches for 3.19-rc1	2014-12-14 16:10:09 -08:00
configs	PM: Eliminate CONFIG_PM_RUNTIME	2014-12-19 22:55:06 +01:00
crypto
firmware
include	kernel: Provide READ_ONCE and ASSIGN_ONCE	2014-12-20 16:48:59 -08:00
kernel	More ACPI and power management updates for 3.19-rc1	2014-12-18 20:28:33 -08:00
kvm	3.19 changes for KVM:	2014-12-18 16:05:28 -08:00
lib
mach-asm9260
mach-at91	ARM: SoC cleanups for 3.19	2014-12-09 14:18:35 -08:00
mach-axxia
mach-bcm	Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2014-12-10 08:38:57 -08:00
mach-berlin
mach-clps711x
mach-cns3xxx
mach-davinci	More ACPI and power management updates for 3.19-rc1	2014-12-18 20:28:33 -08:00
mach-dove
mach-ebsa110
mach-efm32
mach-ep93xx
mach-exynos	More ACPI and power management updates for 3.19-rc1	2014-12-18 20:28:33 -08:00
mach-footbridge
mach-gemini
mach-highbank
mach-hisi
mach-imx	Driver core patches for 3.19-rc1	2014-12-14 16:10:09 -08:00
mach-integrator
mach-iop13xx
mach-iop32x
mach-iop33x
mach-ixp4xx
mach-keystone	ARM / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM	2014-12-13 00:42:49 +01:00
mach-ks8695
mach-lpc32xx
mach-mediatek	ARM: SoC DT updates for 3.19	2014-12-09 14:57:37 -08:00
mach-meson
mach-mmp	Please consider pulling the clk framework changes toward 3.19. It is	2014-12-20 16:42:36 -08:00
mach-moxart
mach-msm
mach-mv78xx0
mach-mvebu	ARM: mvebu: use the cpufreq-dt platform_data for independent clocks	2014-12-04 17:31:32 +01:00
mach-mxs
mach-netx
mach-nomadik
mach-nspire
mach-omap1	ARM / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM	2014-12-13 00:42:49 +01:00
mach-omap2	Please consider pulling the clk framework changes toward 3.19. It is	2014-12-20 16:42:36 -08:00
mach-orion5x
mach-picoxcell
mach-prima2
mach-pxa	Driver core patches for 3.19-rc1	2014-12-14 16:10:09 -08:00
mach-qcom
mach-realview
mach-rockchip
mach-rpc
mach-s3c24xx	Driver core patches for 3.19-rc1	2014-12-14 16:10:09 -08:00
mach-s3c64xx
mach-s5pv210
mach-sa1100	Driver core patches for 3.19-rc1	2014-12-14 16:10:09 -08:00
mach-shmobile	Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux	2014-12-15 15:52:01 -08:00
mach-socfpga
mach-spear
mach-sti
mach-sunxi
mach-tegra	ACPI and power management updates for 3.19-rc1	2014-12-10 21:17:00 -08:00
mach-u300	Driver core patches for 3.19-rc1	2014-12-14 16:10:09 -08:00
mach-ux500
mach-versatile
mach-vexpress
mach-vt8500
mach-w90x900
mach-zynq
mm	ARM: SoC/iommu configuration for 3.19	2014-12-16 14:53:01 -08:00
net
nwfpe
oprofile
plat-iop
plat-omap
plat-orion	ACPI and power management updates for 3.19-rc1	2014-12-10 21:17:00 -08:00
plat-pxa
plat-samsung	Driver core patches for 3.19-rc1	2014-12-14 16:10:09 -08:00
plat-versatile
tools
vfp
xen	xen/arm: introduce GNTTABOP_cache_flush	2014-12-04 12:41:54 +00:00
Kconfig	Merge branch 'akpm' (second patch-bomb from Andrew)	2014-12-13 13:00:36 -08:00
Kconfig-nommu
Kconfig.debug	Char/Misc driver patches for 3.19-rc1	2014-12-14 16:43:47 -08:00
Makefile