- May 29, 2012
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git://people.freedesktop.org/~danvet/drm-intelDave Airlie authored
* 'drm-intel-fixes' of git://people.freedesktop.org/~danvet/drm-intel: drm/i915: tune down the noise of the RP irq limit fail drm/i915: Remove the error message for unbinding pinned buffers drm/i915: Limit page allocations to lowmem (dma32) for i965 drm/i915: always use RPNSWREQ for turbo change requests drm/i915: reject doubleclocked cea modes on dp drm/i915: Adding TV Out Missing modes. drm/i915: wait for a vblank to pass after tv detect drm/i915: no lvds quirk for HP t5740e Thin Client drm/i915: enable vdd when switching off the eDP panel drm/i915: Fix PCH PLL assertions to not assume CRTC:PLL relationship drm/i915: Always update RPS interrupts thresholds along with frequency drm/i915: properly handle interlaced bit for sdvo dtd conversion drm/i915: fix module unload since error_state rework drm/i915: be more careful when returning -ENXIO in gmbus transfer
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Alex Deucher authored
Only override the ddc bus if the connector doesn't have a valid one. The existing code overrode the ddc bus for all connectors even if it had ddc bus. Fixes ddc on another XFX card with the same pci ids that was broken by the quirk overwriting the correct ddc bus. Reported-by:
Mehdi Aqadjani Memar <m.aqadjanimemar@student.ru.nl> Cc: stable@vger.kernel.org Signed-off-by:
Alex Deucher <alexander.deucher@amd.com> Signed-off-by:
Dave Airlie <airlied@redhat.com>
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Ville Syrjälä authored
The rest of the code uses stdint types, so use them in drm_property_change_is_valid() as well. Signed-off-by:
Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by:
Alex Deucher <alexander.deucher@amd.com> Signed-off-by:
Dave Airlie <airlied@redhat.com>
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Ville Syrjälä authored
Signed-off-by:
Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by:
Alex Deucher <alexander.deucher@amd.com> Signed-off-by:
Dave Airlie <airlied@redhat.com>
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Alex Deucher authored
Using the wrong union. Signed-off-by:
Alex Deucher <alexander.deucher@amd.com> Cc: stable@vger.kernel.org Signed-off-by:
Dave Airlie <airlied@redhat.com>
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Dan Carpenter authored
If we hit an error here, then we should unlock and unreference obj before returning. Signed-off-by:
Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by:
Dave Airlie <airlied@redhat.com>
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Dave Airlie authored
Just move its only caller into the same file as it and make it static. Reviewed-by:
Alex Deucher <alexander.deucher@amd.com> Signed-off-by:
Dave Airlie <airlied@redhat.com>
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git://git.open-osd.org/linux-open-osdLinus Torvalds authored
Pull exofs updates from Boaz Harrosh: "Just a couple of patches. The first is a BUG fix destined for stable which missed the 3.4-rc7 Kernel. The second is just a fixture addition so exofs is able to be better exported as a cluster file system via pNFS." * 'for-linus' of git://git.open-osd.org/linux-open-osd: exofs: Add SYSFS info for autologin/pNFS export exofs: Fix CRASH on very early IO errors.
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git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivialLinus Torvalds authored
Pull documentation updates from Jiri Kosina: "I am currently relaying documentation patches through 'doc' branch of trivial tree, until Rob, the new documentation maintainer, has established a proper tree." * 'doc' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: doc: ext3: update documentation with barrier=1 default Documentation/initrd.txt: Change the location of util-linux Documentation/SubmittingPatches: suggested the use of scripts/get_maintainer.pl Documentation/kernel-parameters: remove autotest and mcatest
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git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuildLinus Torvalds authored
Pull misc kbuild changes from Michal Marek: "The non-critical part of kbuild for 3.5 includes - two new coccinelle checks - fix for make deb-pkg to include generated headers in arch/*/include I have more make-deb-pkg fixes in the backlog, but these will likely have to wait for 3.6." * 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild: builddeb: include autogenerated header files scripts/coccinelle: sizeof of pointer scripts/coccinelle: address test is always true
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git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuildLinus Torvalds authored
Pull kconfig changes from Michal Marek: - Error handling for make KCONFIG_ALLCONFIG=<...> all*config plus a fix for a bug that was exposed by this - Fix for the script/config utility. * 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild: scripts/config: properly report and set string options kbuild: all{no,yes,mod,def,rand}config only read files when instructed to. kconfig: Add error handling to KCONFIG_ALLCONFIG
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git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuildLinus Torvalds authored
Pull kbuild updates from Michal Marek. Fixed up nontrivial merge conflict in Makefile as per Stephen Rothwell and linux-next (and trivial arch/sparc/Makefile changes due to removed sparc32 logic). * 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild: mips: Fix KBUILD_CPPFLAGS definition kbuild: fix ia64 link kbuild: document KBUILD_LDS, KBUILD_VMLINUX_{INIT,MAIN} and LDFLAGS_vmlinux kbuild: link of vmlinux moved to a script kbuild: refactor final link of sparc32 kbuild: drop unused KBUILD_VMLINUX_OBJS from top-level Makefile kbuild: Makefile: remove unnecessary check for m68knommu ARCH
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git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linuxLinus Torvalds authored
Pull writeback tree from Wu Fengguang: "Mainly from Jan Kara to avoid iput() in the flusher threads." * tag 'writeback' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux: writeback: Avoid iput() from flusher thread vfs: Rename end_writeback() to clear_inode() vfs: Move waiting for inode writeback from end_writeback() to evict_inode() writeback: Refactor writeback_single_inode() writeback: Remove wb->list_lock from writeback_single_inode() writeback: Separate inode requeueing after writeback writeback: Move I_DIRTY_PAGES handling writeback: Move requeueing when I_SYNC set to writeback_sb_inodes() writeback: Move clearing of I_SYNC into inode_sync_complete() writeback: initialize global_dirty_limit fs: remove 8 bytes of padding from struct writeback_control on 64 bit builds mm: page-writeback.c: local functions should not be exposed globally
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git://git.monstr.eu/linux-2.6-microblazeLinus Torvalds authored
Pull microblaze changes from Michal Simek. * 'next' of git://git.monstr.eu/linux-2.6-microblaze: microblaze: Setup correct pointer to TLS area microblaze: Add TLS support to sys_clone microblaze: ftrace: Pass the first calling instruction for dynamic ftrace microblaze: Port OOM changes to do_page_fault microblaze: Do not select GENERIC_GPIO by default
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- May 28, 2012
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Jonas Bonn authored
The generic version is both easier to support and more correct. Signed-off-by:
Jonas Bonn <jonas@southpole.se> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Paul Mackerras authored
This is much the same as for SPARC except that we can do the find_zero() function more efficiently using the count-leading-zeroes instructions. Tested on 32-bit and 64-bit PowerPC. Signed-off-by:
Paul Mackerras <paulus@samba.org> Acked-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Paul Mackerras authored
The aligned_byte_mask() definition is wrong for 32-bit big-endian machines: the "7-(n)" part of the definition assumes a long is 8 bytes. This fixes it by using BITS_PER_LONG - 8 instead of 8*7. Tested on 32-bit and 64-bit PowerPC. Signed-off-by:
Paul Mackerras <paulus@samba.org> Acked-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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- May 27, 2012
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Linus Torvalds authored
This makes <asm/word-at-a-time.h> actually live up to its promise of allowing architectures to help tune the string functions that do their work a word at a time. David had already taken the x86 strncpy_from_user() function, modified it to work on sparc, and then done the extra work to make it generically useful. This then expands on that work by making x86 use that generic version, completing the circle. But more importantly, it fixes up the word-at-a-time interfaces so that it's now easy to also support things like strnlen_user(), and pretty much most random string functions. David reports that it all works fine on sparc, and Jonas Bonn reported that an earlier version of this worked on OpenRISC too. It's pretty easy for architectures to add support for this and just replace their private versions with the generic code. * generic-string-functions: sparc: use the new generic strnlen_user() function x86: use the new generic strnlen_user() function lib: add generic strnlen_user() function word-at-a-time: make the interfaces truly generic x86: use generic strncpy_from_user routine
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Lekensteyn authored
After 303395ac , some headers are autogenerated. Include these autogenerated headers (mainly unistd_32_ia32.h) in out-of-tree builds to allow DKMS modules to be built succesfully. Signed-off-by:
Peter Lekensteyn <lekensteyn@gmail.com> Signed-off-by:
Michal Marek <mmarek@suse.cz>
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git://git.pengutronix.de/git/wsa/linuxLinus Torvalds authored
Pull i2c-embedded changes from Wolfram Sang: "Major changes: - lots of devicetree additions for existing drivers. I tried hard to make sure the bindings are proper. In more complicated cases, I requested acks from people having more experience with them than me. That took a bit of extra time and also some time went into discussions with developers about what bindings are and what not. I have the feeling that the workflow with bindings should be improved to scale better. I will spend some more thought on this... - i2c-muxes are succesfully used meanwhile, so we dropped EXPERIMENTAL for them and renamed the drivers to a standard pattern to match the rest of the subsystem. They can also be used with devicetree now. - ixp2000 was removed since the whole platform goes away. - cleanups (strlcpy instead of strcpy, NULL instead of 0) - The rest is typical driver fixes I assume. All patches have been in linux-next at least since v3.4-rc6." Fixed up trivial conflict in arch/arm/mach-lpc32xx/common.c due to the same patch already having come in through the arm/soc trees, with additional patches on top of it. * 'i2c-embedded/for-next' of git://git.pengutronix.de/git/wsa/linux: (35 commits) i2c: davinci: Free requested IRQ in remove i2c: ocores: register OF i2c devices i2c: tegra: notify transfer-complete after clearing status. I2C: xiic: Add OF binding support i2c: Rename last mux driver to standard pattern i2c: tegra: fix 10bit address configuration i2c: muxes: rename first set of drivers to a standard pattern of/i2c: implement of_find_i2c_adapter_by_node i2c: implement i2c_verify_adapter i2c-s3c2410: Add HDMIPHY quirk for S3C2440 i2c-s3c2410: Rework device type handling i2c: muxes are not EXPERIMENTAL anymore i2c/of: Automatically populate i2c mux busses from device tree data. i2c: Add a struct device * parameter to i2c_add_mux_adapter() of/i2c: call i2c_verify_client from of_find_i2c_device_by_node i2c: designware: Add clk_{un}prepare() support i2c: designware: add PM support i2c: ixp2000: remove driver i2c: pnx: add device tree support i2c: imx: don't use strcpy but strlcpy ...
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-socLinus Torvalds authored
Pull sweeping late_initcall cleanup for arm-soc from Olof Johansson: "This is a patch series from Shawn Guo that moves from individual late_initcalls() to using a member in the machine structure to invoke a platform's late initcalls. This cleanup is a step in the move towards multiplatform kernels since it would reduce the need to check for compatible platforms in each and every initcall." Fix up trivial conflicts in arch/arm/mach-{exynos/mach-universal_c210.c, imx/mach-cpuimx51.c, omap2/board-generic.c} due to changes nearby (and, in the case of cpuimx51.c the board support being deleted) * tag 'cleanup-initcall' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: ARM: ux500: use machine specific hook for late init ARM: tegra: use machine specific hook for late init ARM: shmobile: use machine specific hook for late init ARM: sa1100: use machine specific hook for late init ARM: s3c64xx: use machine specific hook for late init ARM: prima2: use machine specific hook for late init ARM: pnx4008: use machine specific hook for late init ARM: omap2: use machine specific hook for late init ARM: omap1: use machine specific hook for late init ARM: msm: use machine specific hook for late init ARM: imx: use machine specific hook for late init ARM: exynos: use machine specific hook for late init ARM: ep93xx: use machine specific hook for late init ARM: davinci: use machine specific hook for late init ARM: provide a late_initcall hook for platform initialization
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-socLinus Torvalds authored
Pull arm-soc: soc specific changes (part 2) from Olof Johansson: "This adds support for the spear13xx platform, which has first been under review a long time ago and finally been completed after generic spear work has gone into the clock, dt and pinctrl branches. Also a number of updates for the samsung socs are part of this branch." Fix up trivial conflicts in drivers/gpio/gpio-samsung.c that look much worse than they are: the exonys5 init code was refactored in commit fd454997 ("gpio: samsung: refactor gpiolib init for exynos4/5"), and then commit f10590c9 ("ARM: EXYNOS: add GPC4 bank instance") added a new gpio chip define and did tiny updates to the init code. So the conflict diff looks like hell, but it's actually a fairly simple change. * tag 'soc2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (34 commits) ARM: exynos: fix building with CONFIG_OF disabled ARM: EXYNOS: Add AUXDATA for i2c controllers ARM: dts: Update device tree source files for EXYNOS5250 ARM: EXYNOS: Add device tree support for interrupt combiner ARM: EXYNOS: Add irq_domain support for interrupt combiner ARM: EXYNOS: Remove a new bus_type instance for EXYNOS5 ARM: EXYNOS: update irqs for EXYNOS5250 SoC ARM: EXYNOS: Add pre-divider and fout mux clocks for bpll and mpll ARM: EXYNOS: add GPC4 bank instance ARM: EXYNOS: Redefine IRQ_MCT_L0,1 definition ARM: EXYNOS: Modify the GIC physical address for static io-mapping ARM: EXYNOS: Add watchdog timer clock instance pinctrl: SPEAr1310: Fix pin numbers for clcd_high_res SPEAr: Update MAINTAINERS and Documentation SPEAr13xx: Add defconfig SPEAr13xx: Add compilation support SPEAr13xx: Add dts and dtsi files pinctrl: Add SPEAr13xx pinctrl drivers pinctrl: SPEAr: Create macro for declaring GPIO PINS SPEAr13xx: Add common clock framework support ...
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-socLinus Torvalds authored
Pull arm-soc device tree conversions (part 2) from Olof Johansson: "These continue the device tree work from part 1, this set is for the tegra, mxs and imx platforms, all of which have dependencies on clock or pinctrl changes submitted earlier." Fix up trivial conflicts due to nearby changes in drivers/{gpio/gpio,i2c/busses/i2c}-mxs.c * tag 'dt2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (73 commits) ARM: dt: tegra: invert status=disable vs status=okay ARM: dt: tegra: consistent basic property ordering ARM: dt: tegra: sort nodes based on bus order ARM: dt: tegra: remove duplicate device_type property ARM: dt: tegra: consistenly use lower-case for hex constants ARM: dt: tegra: format regs properties consistently ARM: dt: tegra: gpio comment cleanup ARM: dt: tegra: remove unnecessary unit addresses ARM: dt: tegra: whitespace cleanup ARM: dt: tegra cardhu: fix typo in SDHCI node name ARM: dt: tegra: cardhu: register core regulator tps62361 ARM: dt: tegra30.dtsi: Add SMMU node ARM: dt: tegra20.dtsi: Add GART node ARM: dt: tegra30.dtsi: Add Memory Controller(MC) nodes ARM: dt: tegra20.dtsi: Add Memory Controller(MC) nodes ARM: dt: tegra: Add device tree support for AHB ARM: dts: enable audio support for imx28-evk ARM: dts: enable i2c device for imx28-evk i2c: mxs: add device tree probe support ARM: dts: enable mmc for imx28-evk ...
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-socLinus Torvalds authored
Pull arm-soc stmp-dev library code from Olof Johansson: "A number of devices are using a common register layout, this adds support code for it in lib/stmp_device.c so we do not need to duplicate it in each driver." Fix up trivial conflicts in drivers/i2c/busses/i2c-mxs.c and lib/Makefile * tag 'stmp-dev' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: i2c: mxs: use global reset function lib: add support for stmp-style devices
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-socLinus Torvalds authored
Pull arm-soc clock driver changes from Olof Johansson: "The new clock subsystem was merged in linux-3.4 without any users, this now moves the first three platforms over to it: imx, mxs and spear. The series also contains the changes for the clock subsystem itself, since Mike preferred to have it together with the platforms that require these changes, in order to avoid interdependencies and conflicts." Fix up trivial conflicts in arch/arm/mach-kirkwood/common.c (code removed in one branch, added OF support in another) and drivers/dma/imx-sdma.c (independent changes next to each other). * tag 'clock' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (97 commits) clk: Fix CLK_SET_RATE_GATE flag validation in clk_set_rate(). clk: Provide dummy clk_unregister() SPEAr: Update defconfigs SPEAr: Add SMI NOR partition info in dts files SPEAr: Switch to common clock framework SPEAr: Call clk_prepare() before calling clk_enable SPEAr: clk: Add General Purpose Timer Synthesizer clock SPEAr: clk: Add Fractional Synthesizer clock SPEAr: clk: Add Auxiliary Synthesizer clock SPEAr: clk: Add VCO-PLL Synthesizer clock SPEAr: Add DT bindings for SPEAr's timer ARM i.MX: remove now unused clock files ARM: i.MX6: implement clocks using common clock framework ARM i.MX35: implement clocks using common clock framework ARM i.MX5: implement clocks using common clock framework ARM: Kirkwood: Replace clock gating ARM: Orion: Audio: Add clk/clkdev support ARM: Orion: PCIE: Add support for clk ARM: Orion: XOR: Add support for clk ARM: Orion: CESA: Add support for clk ...
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-socLinus Torvalds authored
Pull arm-soc cleanups (part 2) from Olof Johansson: "More cleanups, continuing an earlier set with omap and samsung specific cleanups. These could not go into the first set because they have dependencies on various other series that in turn depend on the first cleanups." Fixed up conflicts in arch/arm/plat-omap/counter_32k.c due to commit bd0493ea: "move read_{boot,persistent}_clock to the architecture level" that changed how the persistent clocks were handled. And trivial conflicts in arch/arm/mach-omap1/common.h due to just independent changes close to each other. * tag 'cleanup2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (35 commits) ARM: SAMSUNG: merge plat-s5p into plat-samsung ARM: SAMSUNG: move options for common s5p into plat-samsung/Kconfig ARM: SAMSUNG: move setup code for s5p mfc and mipiphy into plat-samsung ARM: SAMSUNG: move platform device for s5p uart into plat-samsung ARM: SAMSUNG: move hr timer for common s5p into plat-samsung ARM: SAMSUNG: move pm part for common s5p into plat-samsung ARM: SAMSUNG: move interrupt part for common s5p into plat-samsung ARM: SAMSUNG: move clock part for common s5p into plat-samsung ARM: S3C24XX: Use common macro to define resources on dev-uart.c ARM: S3C24XX: move common clock init into common.c ARM: S3C24XX: move common power-management code to mach-s3c24xx ARM: S3C24XX: move plat-s3c24xx/dev-uart.c into common.c ARM: S3C24XX: move plat-s3c24xx/cpu.c ARM: OMAP2+: Kconfig: convert SOC_OMAPAM33XX to SOC_AM33XX ARM: OMAP2+: Kconfig: convert SOC_OMAPTI81XX to SOC_TI81XX GPMC: add ECC control definitions ARM: OMAP2+: dmtimer: remove redundant sysconfig context restore ARM: OMAP: AM35xx: convert 3517 detection/flags to AM35xx ARM: OMAP: AM35xx: remove redunant cpu_is checks for AM3505 ARM: OMAP1: Pass dma request lines in platform data to MMC driver ...
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-socLinus Torvalds authored
Pull arm-soc driver specific updates from Olof Johansson: "These changes are specific to some driver that may be used by multiple boards or socs. The most significant change in here is the move of the samsung iommu code from a platform specific in-kernel interface to the generic iommu subsystem." Fix up trivial conflicts in arch/arm/mach-exynos/Kconfig * tag 'drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (28 commits) mmc: dt: Consolidate DT bindings iommu/exynos: Add iommu driver for EXYNOS Platforms ARM: davinci: optimize the DMA ISR ARM: davinci: implement DEBUG_LL port choice ARM: tegra: Add SMMU enabler in AHB ARM: tegra: Add Tegra AHB driver Input: pxa27x_keypad add choice to set direct_key_mask Input: pxa27x_keypad direct key may be low active Input: pxa27x_keypad bug fix for direct_key_mask Input: pxa27x_keypad keep clock on as wakeup source ARM: dt: tegra: pinmux changes for USB ULPI ARM: tegra: add USB ULPI PHY reset GPIO to device tree ARM: tegra: don't hard-code USB ULPI PHY reset_gpio ARM: tegra: change pll_p_out4's rate to 24MHz ARM: tegra: fix pclk rate ARM: tegra: reparent sclk to pll_c_out1 ARM: tegra: Add pllc clock init table ARM: dt: tegra cardhu: basic audio support ARM: dt: tegra30.dtsi: Add audio-related nodes ARM: tegra: add AUXDATA required for audio ...
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-socLinus Torvalds authored
Pull arm-soc defconfig updates from Olof Johansson: "For the first time, we have one branch that collects just updates to defconfig files, mostly for adapting to changes in other subsystems." * tag 'defconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: ARM: PRIMA2: add prima2_defconfig for CSR SiRFprimaII ARM: tegra: update defconfig ARM: tegra: update defconfig ARM: imx_v6_v7_defconfig: Add SPI NOR support ARM: imx_v4_v5_defconfig: Let CONFIG_MACH_IMX27_DT be built by default
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David Miller authored
This throws away the sparc-specific functions in favor of the generic optimized version. Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Linus Torvalds authored
This throws away the old x86-specific functions in favor of the generic optimized version. Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Linus Torvalds authored
This adds a new generic optimized strnlen_user() function that uses the <asm/word-at-a-time.h> infrastructure to portably do efficient string handling. In many ways, strnlen is much simpler than strncpy, and in particular we can always pre-align the words we load from memory. That means that all the worries about alignment etc are a non-issue, so this one can easily be used on any architecture. You obviously do have to do the appropriate word-at-a-time.h macros. Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Linus Torvalds authored
This changes the interfaces in <asm/word-at-a-time.h> to be a bit more complicated, but a lot more generic. In particular, it allows us to really do the operations efficiently on both little-endian and big-endian machines, pretty much regardless of machine details. For example, if you can rely on a fast population count instruction on your architecture, this will allow you to make your optimized <asm/word-at-a-time.h> file with that. NOTE! The "generic" version in include/asm-generic/word-at-a-time.h is not truly generic, it actually only works on big-endian. Why? Because on little-endian the generic algorithms are wasteful, since you can inevitably do better. The x86 implementation is an example of that. (The only truly non-generic part of the asm-generic implementation is the "find_zero()" function, and you could make a little-endian version of it. And if the Kbuild infrastructure allowed us to pick a particular header file, that would be lovely) The <asm/word-at-a-time.h> functions are as follows: - WORD_AT_A_TIME_CONSTANTS: specific constants that the algorithm uses. - has_zero(): take a word, and determine if it has a zero byte in it. It gets the word, the pointer to the constant pool, and a pointer to an intermediate "data" field it can set. This is the "quick-and-dirty" zero tester: it's what is run inside the hot loops. - "prep_zero_mask()": take the word, the data that has_zero() produced, and the constant pool, and generate an *exact* mask of which byte had the first zero. This is run directly *outside* the loop, and allows the "has_zero()" function to answer the "is there a zero byte" question without necessarily getting exactly *which* byte is the first one to contain a zero. If you do multiple byte lookups concurrently (eg "hash_name()", which looks for both NUL and '/' bytes), after you've done the prep_zero_mask() phase, the result of those can be or'ed together to get the "either or" case. - The result from "prep_zero_mask()" can then be fed into "find_zero()" (to find the byte offset of the first byte that was zero) or into "zero_bytemask()" (to find the bytemask of the bytes preceding the zero byte). The existence of zero_bytemask() is optional, and is not necessary for the normal string routines. But dentry name hashing needs it, so if you enable DENTRY_WORD_AT_A_TIME you need to expose it. This changes the generic strncpy_from_user() function and the dentry hashing functions to use these modified word-at-a-time interfaces. This gets us back to the optimized state of the x86 strncpy that we lost in the previous commit when moving over to the generic version. Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Linus Torvalds authored
The generic strncpy_from_user() is not really optimal, since it is designed to work on both little-endian and big-endian. And on little-endian you can simplify much of the logic to find the first zero byte, since little-endian arithmetic doesn't have to worry about the carry bit propagating into earlier bytes (only later bytes, which we don't care about). But I have patches to make the generic routines use the architecture- specific <asm/word-at-a-time.h> infrastructure, so that we can regain the little-endian optimizations. But before we do that, switch over to the generic routines to make the patches each do just one well-defined thing. Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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- May 26, 2012
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git://git.kernel.org/pub/scm/linux/kernel/git/ras/rasLinus Torvalds authored
Pull x86/mce merge window patches from Tony Luck: "Including two that make error_context() checks less sucky" * tag 'x86-mce-merge' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras: x86/mce: Add instruction recovery signatures to mce-severity table x86/mce: Fix check for processor context when machine check was taken. MCE: Fix vm86 handling for 32bit mce handler x86/mce Add validation check before GHES error is recorded x86/mce: Avoid reading every machine check bank register twice.
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git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tileLinus Torvalds authored
Pull tile updates from Chris Metcalf: "These changes cover a range of new arch/tile features and optimizations. They've been through LKML review and on linux-next for a month or so. There's also one bug-fix that just missed 3.4, which I've marked for stable." Fixed up trivial conflict in arch/tile/Kconfig (new added tile Kconfig entries clashing with the generic timer/clockevents changes). * git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile: tile: default to tilegx_defconfig for ARCH=tile tile: fix bug where fls(0) was not returning 0 arch/tile: mark TILEGX as not EXPERIMENTAL tile/mm/fault.c: Port OOM changes to handle_page_fault arch/tile: add descriptive text if the kernel reports a bad trap arch/tile: allow querying cpu module information from the hypervisor arch/tile: fix hardwall for tilegx and generalize for idn and ipi arch/tile: support multiple huge page sizes dynamically mm: add new arch_make_huge_pte() method for tile support arch/tile: support kexec() for tilegx arch/tile: support <asm/cachectl.h> header for cacheflush() syscall arch/tile: Allow tilegx to build with either 16K or 64K page size arch/tile: optimize get_user/put_user and friends arch/tile: support building big-endian kernel arch/tile: allow building Linux with transparent huge pages enabled arch/tile: use interrupt critical sections less
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David Woodhouse authored
Now we have four copies of this code, Linus "suggested" it was about time we stopped copying it and turned it into a helper. Signed-off-by:
David Woodhouse <David.Woodhouse@intel.com> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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David Woodhouse authored
Add device info into list before doing context mapping, because device info will be used by iommu_enable_dev_iotlb(). Without it, ATS won't get enabled as it should be. ATS, while a dubious decision from a security point of view, can be very important for performance. Signed-off-by:
Xudong Hao <xudong.hao@intel.com> Signed-off-by:
Xiantao Zhang <xiantao.zhang@intel.com> Acked-by:
Chris Wright <chrisw@sous-sol.org> Signed-off-by:
David Woodhouse <David.Woodhouse@intel.com> Cc: stable@kernel.org Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Chris Metcalf authored
There is no "ARCH=tile" (just like there is no "ARCH=x86") so we need to pick a default configuration, either tilepro or tilegx, when users specify ARCH=tile. We'll use tilegx, since that's our current chip. Reported-by:
Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by:
Chris Metcalf <cmetcalf@tilera.com>
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Chris Metcalf authored
This is because __builtin_clz(0) returns 64 for the "undefined" case of 0, since the builtin just does a right-shift 32 and "clz" instruction. So, use the alpha approach of casting to u32 and using __builtin_clzll(). Cc: stable@vger.kernel.org Signed-off-by:
Chris Metcalf <cmetcalf@tilera.com>
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Chris Metcalf authored
Also create a TILEPRO config setting to use for #ifdefs where it is cleaner to do so, and make the 64BIT setting depend directly on the setting of TILEGX. Signed-off-by:
Chris Metcalf <cmetcalf@tilera.com>
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