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2015-02-24ARM: shmobile: kzm9g dts: Sync with kzm9g-reference dtsMagnus Damm1-1/+373
Sync the two DTS for the KZM9G board. The target is the file "sh73a0-kzm9g.dts" and it is made identical to the DT reference case with the exception of the compatbile string. In the future the DT reference file will go away. Signed-off-by: Magnus Damm <damm+renesas@opensource.se> [geert: Update for recent changes to sh73a0-kzm9g-reference.dts] Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-02-24ARM: shmobile: sh73a0: Add Multiplatform supportMagnus Damm3-3/+8
Enable sh73a0 Multiplatform support for the generic sh73a0 machine vector. No board support is enabled, and the board code for KZM9G DT Reference is left by itself. Signed-off-by: Magnus Damm <damm+renesas@opensource.se> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-02-24ARM: shmobile: sh73a0: Introduce generic setup callbackMagnus Damm1-3/+13
Add a generic sh73a0 machine setup callback for the upcoming sh73a0 multiplatform case. Cache needs to be configured, and legacy clocks must be omitted. Signed-off-by: Magnus Damm <damm+renesas@opensource.se> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-02-24Merge branch 'heads/dt-for-v4.1' into sh73a0-multiplatform-for-v4.1.baseSimon Horman17-51/+647
2015-02-24ARM: shmobile: r8a7794: add SDHI DT supportSergei Shtylyov1-0/+24
Define the generic R8A7794 parts of the SDHI[012] device nodes. Based on the orginal patch by Shinobu Uehara <shinobu.uehara.xc@renesas.com>. Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-02-24drivers: bus: Add Simple Power-Managed Bus DriverGeert Uytterhoeven3-0/+72
Add a driver for transparent busses that don't need a real driver, but where the bus controller is part of a PM domain, or under the control of a functional clock. Typically, the bus controller's PM domain and/or clock must be enabled for child devices connected to the bus (either on-SoC or externally) to function. Hence the sole purpose of this driver is to enable its clock and PM domain (if exist(s)), which are specified in the DT and managed from platform and PM domain code, and to probe for child devices. Due to the child-parent relationship with devices connected to the bus, PM domain and clock state transitions are handled in the correct order. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Tested-by: Ulrich Hecht <ulrich.hecht+renesas@gmail.com> Reviewed-by: Kevin Hilman <khilman@linaro.org> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-02-24drivers: bus: Add Renesas Bus State Controller (BSC) DT BindingsGeert Uytterhoeven1-0/+46
The bindings for the BSC extend the bindings for "simple-pm-bus". Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Kevin Hilman <khilman@linaro.org> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-02-24drivers: bus: Add Simple Power-Managed Bus DT BindingsGeert Uytterhoeven1-0/+44
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Tested-by: Ulrich Hecht <ulrich.hecht+renesas@gmail.com> Reviewed-by: Kevin Hilman <khilman@linaro.org> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-02-24drivers: bus: Sort Makefile entries alphabeticallyGeert Uytterhoeven1-7/+7
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Tested-by: Ulrich Hecht <ulrich.hecht+renesas@gmail.com> Reviewed-by: Kevin Hilman <khilman@linaro.org> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-02-24drivers: bus: Sort Kconfig entries alphabeticallyGeert Uytterhoeven1-22/+22
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Tested-by: Ulrich Hecht <ulrich.hecht+renesas@gmail.com> Reviewed-by: Kevin Hilman <khilman@linaro.org> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-02-24ARM: shmobile: r8a7790: add ADSP clocksSergei Shtylyov2-4/+9
Add the ADSP clocks to the CPG and MSTP5 nodes of the R8A7790 device tree. Based on the original patch by Konstantin Kozhevnikov <konstantin.kozhevnikov@cogentembedded.com>. Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-02-24ARM: shmobile: r8a7791: add ADSP clocksSergei Shtylyov2-4/+9
Add the ADSP clocks to the CPG and MSTP5 nodes of the R8A7791 device tree. Based on the original patch by Konstantin Kozhevnikov <konstantin.kozhevnikov@cogentembedded.com>. Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-02-24ARM: shmobile: henninger: add CAN0 DT supportSergei Shtylyov1-0/+11
Define the Henninger board dependent part of the CAN0 device node. Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-02-24ARM: shmobile: r8a7791: add CAN DT supportSergei Shtylyov1-0/+20
Define the generic R8A7791 parts of the CAN0/1 device nodes. Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-02-24ARM: shmobile: r8a7791: add CAN clocksSergei Shtylyov2-2/+22
The R-Car CAN controllers can derive the CAN bus clock not only from their peripheral clock input (clkp1) but also from the other internal clock (clkp2) and external clock fed on CAN_CLK pin. Describe those clocks in the device tree, along with the USB_EXTAL clock from which clkp2 is derived. Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-02-24ARM: shmobile: r8a7790: add CAN DT supportSergei Shtylyov1-0/+20
Define the generic R8A7790 parts of the CAN0/1 device nodes. Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-02-24ARM: shmobile: r8a7790: add CAN clocksSergei Shtylyov2-2/+21
The R-Car CAN controllers can derive the CAN bus clock not only from their peripheral clock input (clkp1) but also from the other internal clock (clkp2) and external clock fed on CAN_CLK pin. Describe those clocks in the device tree, along with the USB_EXTAL clock from which clkp2 is derived. Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-02-24ARM: shmobile: emev2-kzm9d dts: Add PFC information for uart1Niklas Söderlund1-0/+13
Configure the pinmux on kzm9d to use the serial connector for uart1. Signed-off-by: Niklas Söderlund <niso@kth.se> Acked-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-02-24ARM: shmobile: emev2 dtsi: Add PFC informationNiklas Söderlund1-0/+10
With this information all GPIOs can make use of the PFC functionality. Signed-off-by: Niklas Söderlund <niso@kth.se> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-02-24ARM: shmobile: r8a7791: smp: remap whole apmu regionWolfram Sang1-1/+1
Documentation says the last register is at 0x184 (CAxCPUCMCR), so use proper length. Current APMU code accesses CAxCPUnCR which is currently outside of the remapped area. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-02-24ARM: shmobile: r8a7790: smp: remap whole apmu regionWolfram Sang1-2/+2
Documentation says the last register is at 0x184 (CAxCPUCMCR), so use proper length. Current APMU code accesses CAxCPUnCR which is currently outside of the remapped area. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-02-24ARM: shmobile: koelsch: Add DU HDMI output supportLaurent Pinchart1-1/+49
Add DT nodes for the ADV7511 HDMI encoder and its HDMI output connector and configure the DISP pin group that drives the HDMI transmitter DE pin. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Acked-by: Simon Horman <horms+renesas@verge.net.au> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-02-24ARM: shmobile: r8a7791: Correct SDHI clock labels and output-namesSimon Horman1-5/+5
There appears to have been some inconsistency and confusion here as on the r8a7790 these clocks are referred to as SD(HI)1 and SD(HI)2 while on the r8a7791 and r8a7794 they are referred to as SD(HI)2 and SD(HI)3. Fixes: 59e79895b95892863 ("ARM: shmobile: r8a7791: Add clocks") Reported-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Simon Horman <horms+renesas@verge.net.au> Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
2015-02-24ARM: shmobile: r8a7794: Correct SDHI clock base address, labels and output-namesSimon Horman1-6/+6
* Correct base address of SD3 div6 clk. * Update div6 clock node labels There appears to have been some inconsistency and confusion here as on the r8a7790 these clocks are referred to as SD(HI)1 and SD(HI)2 while on the r8a7791 and r8a7794 they are referred to as SD(HI)2 and SD(HI)3. This has no run-time affect as the clock nodes are not currently used. Fixes: 8e181633e6ca96049 ("ARM: shmobile: r8a7794: Add SDHI clocks to device tree") Reported-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Reported-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Simon Horman <horms+renesas@verge.net.au> Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
2015-02-24ARM: shmobile: r8a7794: alt: Enable ethernet controllerLaurent Pinchart1-0/+13
Enable the ethernet controller for the Alt board. Pin muxing entries are currently left out as r8a7794 pin control support isn't available yet. We thus rely on the boot loader to configure ethernet pins for now. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-02-24ARM: shmobile: r8a7794: Add ethernet controller to device treeLaurent Pinchart1-0/+11
Add a DT node for the on-SoC ethernet controller device. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-02-24ARM: shmobile: r8a7794: Add IPMMU DT nodesLaurent Pinchart1-0/+50
Add the six IPMMU instances found in the r8a7794 to DT with a disabled status. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-02-24ARM: shmobile: r8a7791: Add IPMMU DT nodesLaurent Pinchart1-0/+60
Add the seven IPMMU instances found in the r8a7791 to DT with a disabled status. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-02-24ARM: shmobile: r8a7790: Add IPMMU DT nodesLaurent Pinchart1-0/+51
Add the six IPMMU instances found in the r8a7790 to DT with a disabled status. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-02-24ARM: shmobile: r8a7794: Add DMAC devices to DTLaurent Pinchart1-0/+60
Instantiate the two system DMA controllers in the r8a7794 device tree. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-02-24ARM: shmobile: kzm9g-reference dts: Declare the full 512 MiB of RAMGeert Uytterhoeven1-1/+1
Traditionally, the first 16 MiB of RAM was reserved for the RT processor. However, this is incompatible with CONFIG_AUTO_ZRELADDR=y, which requires that the start address of physical memory is a multiple of 128 MiB. As CONFIG_AUTO_ZRELADDR=y is enabled for multi-platform kernels, declare RAM to start at 0x40000000. While at it, reclaim the last 8 MiB of RAM, too, so the full 512 MiB is available. Note that kzm9g_defconfig still has CONFIG_MEMORY_START=0x41000000 and CONFIG_MEMORY_SIZE=0x1f000000, so before the advent of DT we scribbled over the last 8 MiB, too. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-02-24ARM: shmobile: kzm9g dts: Declare the full 512 MiB of RAMGeert Uytterhoeven1-1/+1
Traditionally, the first 16 MiB of RAM was reserved for the RT processor. However, this is incompatible with CONFIG_AUTO_ZRELADDR=y, which requires that the start address of physical memory is a multiple of 128 MiB. As CONFIG_AUTO_ZRELADDR=y is enabled for multi-platform kernels, declare RAM to start at 0x40000000. While at it, reclaim the last 8 MiB of RAM, too, so the full 512 MiB is available. Note that kzm9g_defconfig still has CONFIG_MEMORY_START=0x41000000 and CONFIG_MEMORY_SIZE=0x1f000000, so before the advent of DT we scribbled over the last 8 MiB, too. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-02-24ARM: shmobile: sh73a0 dtsi: Add selectable sources to DIV6 clocksUlrich Hecht1-19/+45
Specifies clock sources and register bits. Signed-off-by: Ulrich Hecht <ulrich.hecht+renesas@gmail.com> [geert: Drop renesas,src-shift/renesas,src-width, pad to 4 or 8 parents] Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-02-24ARM: shmobile: sh73a0 dtsi: Add missing INTCA0 clock for irqpin moduleGeert Uytterhoeven2-0/+18
This clock drives the irqpin controller modules. Before, it was assumed enabled by the bootloader or reset state. By making it available to the driver, we make sure it gets enabled when needed, and allow it to be managed by system or runtime PM. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-02-24ARM: shmobile: kzm9g-reference dts: Add st1232 touchscreen nodeLaurent Pinchart1-0/+11
Enable the kzm9g touchscreen controller in the board's DT file. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-02-24ARM: shmobile: kzm9g-reference dts: Add r2025sd rtc nodeGeert Uytterhoeven1-0/+5
Add a DT node for the R2025D real-time clock, which is connected to i2c0. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-02-24ARM: shmobile: kzm9g-reference dts: Add adxl345 accelerometer nodeGeert Uytterhoeven1-0/+8
Add a DT node for the ADXL345 three-axis digital accelerometer sensor, which is connected to i2c0. As trivial i2c devices are matched against the first compatible entry only, compatibility is declared with "adi,adxl34x" only for now. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> The device needs an interrupt to operate properly. Specify the two interrupts used on the board. While at it rename the DT node to accelerometer@1d to describe the device's function instead of its model. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-02-24ARM: shmobile: kzm9g-reference dts: Add ak8975 magnetometer nodeGeert Uytterhoeven1-0/+7
Add a DT node for the AK8975 magnetometer sensor, which is connected to i2c0. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Specify the device interrupt to avoid polling for end of conversion. While at it rename the DT node to compass@c to describe the device's function instead of its model. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-02-24ARM: shmobile: kzm9g-reference dts: Sort i2c0 children by unit addressGeert Uytterhoeven1-6/+7
While at it rename the ak4648 node to "codec" to describe the device's function instead of its model, and move its device-specific property after its generic properties. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-02-24ARM: shmobile: sh73a0 dtsi: Set control-parent for all irqpin nodesLaurent Pinchart1-0/+3
The sh73a0 INTC can't mask interrupts properly most likely due to a hardware bug. Set the control-parent property to delegate masking to the parent interrupt controller. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-02-24ARM: shmobile: r8a7740 dtsi: add remaining DIV6 clocksUlrich Hecht1-1/+78
This adds the remaining DIV6 clocks and all possible parents for the SUB clock. Signed-off-by: Ulrich Hecht <ulrich.hecht+renesas@gmail.com> Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2015-02-23Linux 4.0-rc1Linus Torvalds1-4/+4
.. after extensive statistical analysis of my G+ polling, I've come to the inescapable conclusion that internet polls are bad. Big surprise. But "Hurr durr I'ma sheep" trounced "I like online polls" by a 62-to-38% margin, in a poll that people weren't even supposed to participate in. Who can argue with solid numbers like that? 5,796 votes from people who can't even follow the most basic directions? In contrast, "v4.0" beat out "v3.20" by a slimmer margin of 56-to-44%, but with a total of 29,110 votes right now. Now, arguably, that vote spread is only about 3,200 votes, which is less than the almost six thousand votes that the "please ignore" poll got, so it could be considered noise. But hey, I asked, so I'll honor the votes.
2015-02-23Merge tag 'ext4_for_linus' of ↵Linus Torvalds5-56/+108
git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 Pull ext4 fixes from Ted Ts'o: "Ext4 bug fixes. We also reserved code points for encryption and read-only images (for which the implementation is mostly just the reserved code point for a read-only feature :-)" * tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: ext4: fix indirect punch hole corruption ext4: ignore journal checksum on remount; don't fail ext4: remove duplicate remount check for JOURNAL_CHECKSUM change ext4: fix mmap data corruption in nodelalloc mode when blocksize < pagesize ext4: support read-only images ext4: change to use setup_timer() instead of init_timer() ext4: reserve codepoints used by the ext4 encryption feature jbd2: complain about descriptor block checksum errors
2015-02-23Merge branch 'for-linus-2' of ↵Linus Torvalds70-758/+907
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull more vfs updates from Al Viro: "Assorted stuff from this cycle. The big ones here are multilayer overlayfs from Miklos and beginning of sorting ->d_inode accesses out from David" * 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (51 commits) autofs4 copy_dev_ioctl(): keep the value of ->size we'd used for allocation procfs: fix race between symlink removals and traversals debugfs: leave freeing a symlink body until inode eviction Documentation/filesystems/Locking: ->get_sb() is long gone trylock_super(): replacement for grab_super_passive() fanotify: Fix up scripted S_ISDIR/S_ISREG/S_ISLNK conversions Cachefiles: Fix up scripted S_ISDIR/S_ISREG/S_ISLNK conversions VFS: (Scripted) Convert S_ISLNK/DIR/REG(dentry->d_inode) to d_is_*(dentry) SELinux: Use d_is_positive() rather than testing dentry->d_inode Smack: Use d_is_positive() rather than testing dentry->d_inode TOMOYO: Use d_is_dir() rather than d_inode and S_ISDIR() Apparmor: Use d_is_positive/negative() rather than testing dentry->d_inode Apparmor: mediated_filesystem() should use dentry->d_sb not inode->i_sb VFS: Split DCACHE_FILE_TYPE into regular and special types VFS: Add a fallthrough flag for marking virtual dentries VFS: Add a whiteout dentry type VFS: Introduce inode-getting helpers for layered/unioned fs environments Infiniband: Fix potential NULL d_inode dereference posix_acl: fix reference leaks in posix_acl_create autofs4: Wrong format for printing dentry ...
2015-02-22Merge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-armLinus Torvalds1-1/+1
Pull ARM fix from Russell King: "Just one fix this time around. __iommu_alloc_buffer() can cause a BUG() if dma_alloc_coherent() is called with either __GFP_DMA32 or __GFP_HIGHMEM set. The patch from Alexandre addresses this" * 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm: ARM: 8305/1: DMA: Fix kzalloc flags in __iommu_alloc_buffer()
2015-02-22autofs4 copy_dev_ioctl(): keep the value of ->size we'd used for allocationAl Viro1-2/+6
X-Coverup: just ask spender Cc: stable@vger.kernel.org Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-02-22procfs: fix race between symlink removals and traversalsAl Viro3-12/+22
use_pde()/unuse_pde() in ->follow_link()/->put_link() resp. Cc: stable@vger.kernel.org Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-02-22debugfs: leave freeing a symlink body until inode evictionAl Viro1-17/+17
As it is, we have debugfs_remove() racing with symlink traversals. Supply ->evict_inode() and do freeing there - inode will remain pinned until we are done with the symlink body. And rip the idiocy with checking if dentry is positive right after we'd verified debugfs_positive(), which is a stronger check... Cc: stable@vger.kernel.org Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-02-22Documentation/filesystems/Locking: ->get_sb() is long goneAl Viro1-2/+0
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-02-22trylock_super(): replacement for grab_super_passive()Konstantin Khlebnikov3-26/+22
I've noticed significant locking contention in memory reclaimer around sb_lock inside grab_super_passive(). Grab_super_passive() is called from two places: in icache/dcache shrinkers (function super_cache_scan) and from writeback (function __writeback_inodes_wb). Both are required for progress in memory allocator. Grab_super_passive() acquires sb_lock to increment sb->s_count and check sb->s_instances. It seems sb->s_umount locked for read is enough here: super-block deactivation always runs under sb->s_umount locked for write. Protecting super-block itself isn't a problem: in super_cache_scan() sb is protected by shrinker_rwsem: it cannot be freed if its slab shrinkers are still active. Inside writeback super-block comes from inode from bdi writeback list under wb->list_lock. This patch removes locking sb_lock and checks s_instances under s_umount: generic_shutdown_super() unlinks it under sb->s_umount locked for write. New variant is called trylock_super() and since it only locks semaphore, callers must call up_read(&sb->s_umount) instead of drop_super(sb) when they're done. Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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