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2011-09-14regulator: Implement deferred disable supportMark Brown
It is a reasonably common pattern for hardware to require some delay after being quiesced before the disable has finalised, especially in mixed signal devices. For example, an active discharge may be required to ensure that the circuit starts up again in a known state. Avoid having to implement such delays in the regulator API by providing regulator_deferred_disable() which will do a regulator_disable() a specified number of milliseconds after it is called. Due to the reference counting done on regulators a deferred disable can be cancelled by doing another regulator_enable(). Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Liam Girdwood <lrg@ti.com>
2011-09-09Merge branch 'topic/interface' of git://opensource.wolfsonmicro.com/regmap ↵Mark Brown
into for-3.2
2011-09-09regmap: Provide device read and write map interface for mergingMark Brown
Add the externally visible interface introduced by Lars-Peter's commit 6f3064 (regmap: Add support for device specific write and read flag masks) separately in order to allow merge into other subsystems for integration with drivers. Drivers relying on this feature will not be functional until they are merged with the implementation. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2011-08-31ASoC: Allow source specification for CODEC level sysclkMark Brown
Similarly to PLLs/FLLs some modern CODECs provide selectable system clock sources. When the clock is the clock for a DAI we do not usually need to identify which clock is being configured so can use clk_id for the source clock but with CODEC wide system clocks we will need to specify both the clock being configured and the source. Add a source argument to the CODEC driver set_sysclk() operation to reflect this. As this operation is not as widely used as the DAI set_sysclk() operation the change is not very invasive. We probably ought to go and make the same alternation for DAIs at some point. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2011-08-31ASoC: Allow register defaults to be larger than unsigned shortMark Brown
Devices that need this exist; obviously the newer regmap defaults mechanism will deal with this more happily. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2011-08-22ASoC: Allow idle_bias_off to be specified in CODEC driversMark Brown
If devices can unconditionally support idle_bias_off let them flag it in their driver structure. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Liam Girdwood <lrg@ti.com>
2011-08-21regmap: Allow drivers to specify register defaultsMark Brown
It is useful for the register cache code to be able to specify the default values for the device registers. The major use is when restoring the register cache after suspend, knowing the register defaults allows us to skip registers that are at their default values when we resume which can be a substantial win on larger modern devices. For some devices (mostly older ones) the hardware does not support readback so the only way we can know the values is from code and so initializing the cache with default values makes it much easier for drivers work with read/modify/write updates. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2011-08-16ASoC: Add ADAU1373 codec supportLars-Peter Clausen
This patch adds support for the Analog Devices ADAU1373 audio codec. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2011-08-16ASoC: Add WM8958 noise gate supportMark Brown
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2011-08-12ASoC: Add bitfield definitions for WM8958 MICBIAS registersMark Brown
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Liam Girdwood <lrg@ti.com>
2011-08-12Merge branch 'for-3.1' into for-3.2Mark Brown
2011-08-12ASoC: omap: Update e-mail address of Jarkko NikulaJarkko Nikula
My gmail account got disabled and I'm not going to reopen it. Signed-off-by: Jarkko Nikula <jarkko.nikula@bitmer.com> Acked-by: Liam Girdwood <lrg@ti.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2011-08-09regmap: Fix kerneldoc errors for regmapMark Brown
Field names didn't match between the documentation and the code. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2011-08-09Merge branch 'for-3.1' into for-3.2Mark Brown
2011-08-08regmap: Add precious registers to the driver interfaceMark Brown
Some devices are sensitive to reads on their registers, especially for things like clear on read interrupt status registers. Avoid creating problems with these with things like debugfs by allowing drivers to tell the core about them. If a register is marked as precious then the core will not internally generate any reads of it. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2011-08-08regmap: Allow devices to specify which registers are accessibleMark Brown
This is currently unused but we need to know which registers exist and their properties in order to implement diagnostics like register map dumps and the cache features. We use callbacks partly because properties can vary at runtime (eg, through access locks on registers) and partly because big switch statements are a good compromise between readable code and small data size for providing information on big register maps. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2011-08-08regmap: Add kerneldoc for struct regmap_configMark Brown
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2011-08-08Merge branch 'regmap-asoc' into for-3.2Mark Brown
2011-08-08ASoC: Add regmap as a control typeMark Brown
Allow drivers to set up their own regmap API structures. This is mainly useful with MFDs where the core driver will have set up regmap at the minute, though it may make sense to push the existing regmap setup out of the core into the drivers. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Liam Girdwood <lrg@ti.com>
2011-08-08ASoC: Use new register map API for ASoC generic physical I/OMark Brown
Remove all the ASoC specific physical I/O code and replace it with calls into the regmap API. The bulk write code can only be used safely if all regmap calls are locked with the CODEC lock, we need to add bulk support to the regmap API or replace the code with an open coded loop (though currently it has no users...). Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Liam Girdwood <lrg@ti.com>
2011-08-08Merge branch 'for-3.1' into for-3.2Mark Brown
Conflict due to the fix for the register map failure - taken the for-3.1 version. Conflicts: sound/soc/codecs/sgtl5000.c
2011-08-08ASoC: Rename WM8915 to WM8996Mark Brown
For marketing reasons the part will be called WM8996. In order to avoid user confusion rename the driver to reflect this. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Kukjin Kim <kgene.kim@samsung.com> Acked-by: Liam Girdwood <lrg@ti.com>
2011-08-07fix rcu annotations noise in cred.hAl Viro
task->cred is declared as __rcu, and access to other tasks' ->cred is, indeed, protected. Access to current->cred does not need rcu_dereference() at all, since only the task itself can change its ->cred. sparse, of course, has no way of knowing that... Add force-cast in current_cred(), make current_fsuid() et.al. use it. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-08-07Merge branch 'for-linus' of git://git.open-osd.org/linux-open-osdLinus Torvalds
* 'for-linus' of git://git.open-osd.org/linux-open-osd: ore: Make ore its own module exofs: Rename raid engine from exofs/ios.c => ore exofs: ios: Move to a per inode components & device-table exofs: Move exofs specific osd operations out of ios.c exofs: Add offset/length to exofs_get_io_state exofs: Fix truncate for the raid-groups case exofs: Small cleanup of exofs_fill_super exofs: BUG: Avoid sbi realloc exofs: Remove pnfs-osd private definitions nfs_xdr: Move nfs4_string definition out of #ifdef CONFIG_NFS_V4
2011-08-07vfs: optimize inode cache access patternsLinus Torvalds
The inode structure layout is largely random, and some of the vfs paths really do care. The path lookup in particular is already quite D$ intensive, and profiles show that accessing the 'inode->i_op->xyz' fields is quite costly. We already optimized the dcache to not unnecessarily load the d_op structure for members that are often NULL using the DCACHE_OP_xyz bits in dentry->d_flags, and this does something very similar for the inode ops that are used during pathname lookup. It also re-orders the fields so that the fields accessed by 'stat' are together at the beginning of the inode structure, and roughly in the order accessed. The effect of this seems to be in the 1-2% range for an empty kernel "make -j" run (which is fairly kernel-intensive, mostly in filename lookup), so it's visible. The numbers are fairly noisy, though, and likely depend a lot on exact microarchitecture. So there's more tuning to be done. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-08-07vfs: renumber DCACHE_xyz flags, remove some stale onesLinus Torvalds
Gcc tends to generate better code with small integers, including the DCACHE_xyz flag tests - so move the common ones to be first in the list. Also just remove the unused DCACHE_INOTIFY_PARENT_WATCHED and DCACHE_AUTOFS_PENDING values, their users no longer exists in the source tree. And add a "unlikely()" to the DCACHE_OP_COMPARE test, since we want the common case to be a nice straight-line fall-through. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-08-07Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: net: Compute protocol sequence numbers and fragment IDs using MD5. crypto: Move md5_transform to lib/md5.c
2011-08-07exofs: Rename raid engine from exofs/ios.c => oreBoaz Harrosh
ORE stands for "Objects Raid Engine" This patch is a mechanical rename of everything that was in ios.c and its API declaration to an ore.c and an osd_ore.h header. The ore engine will later be used by the pnfs objects layout driver. * File ios.c => ore.c * Declaration of types and API are moved from exofs.h to a new osd_ore.h * All used types are prefixed by ore_ from their exofs_ name. * Shift includes from exofs.h to osd_ore.h so osd_ore.h is independent, include it from exofs.h. Other than a pure rename there are no other changes. Next patch will move the ore into it's own module and will export the API to be used by exofs and later the layout driver Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
2011-08-07net: Compute protocol sequence numbers and fragment IDs using MD5.David S. Miller
Computers have become a lot faster since we compromised on the partial MD4 hash which we use currently for performance reasons. MD5 is a much safer choice, and is inline with both RFC1948 and other ISS generators (OpenBSD, Solaris, etc.) Furthermore, only having 24-bits of the sequence number be truly unpredictable is a very serious limitation. So the periodic regeneration and 8-bit counter have been removed. We compute and use a full 32-bit sequence number. For ipv6, DCCP was found to use a 32-bit truncated initial sequence number (it needs 43-bits) and that is fixed here as well. Reported-by: Dan Kaminsky <dan@doxpara.com> Tested-by: Willy Tarreau <w@1wt.eu> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-08-07crypto: Move md5_transform to lib/md5.cDavid S. Miller
We are going to use this for TCP/IP sequence number and fragment ID generation. Signed-off-by: David S. Miller <davem@davemloft.net>
2011-08-06Merge branch 'for_linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/mjg59/platform-drivers-x86 * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mjg59/platform-drivers-x86: (38 commits) acer-wmi: support Lenovo ideapad S205 wifi switch acerhdf.c: spaces in aliased changed to * platform-drivers-x86: ideapad-laptop: add missing ideapad_input_exit in ideapad_acpi_add error path x86 driver: fix typo in TDP override enabling Platform: fix samsung-laptop DMI identification for N150/N210/220/N230 dell-wmi: Add keys for Dell XPS L502X platform-drivers-x86: samsung-q10: make dmi_check_callback return 1 Platform: Samsung Q10 backlight driver platform-drivers-x86: intel_scu_ipc: convert to DEFINE_PCI_DEVICE_TABLE platform-drivers-x86: intel_rar_register: convert to DEFINE_PCI_DEVICE_TABLE platform-drivers-x86: intel_menlow: add missing return AE_OK for intel_menlow_register_sensor() platform-drivers-x86: intel_mid_thermal: fix memory leak platform-drivers-x86: msi-wmi: add missing sparse_keymap_free in msi_wmi_init error path Samsung Laptop platform driver: support N510 asus-wmi: add uwb rfkill support asus-wmi: add gps rfkill support asus-wmi: add CWAP support and clarify the meaning of WAPF bits asus-wmi: return proper value in store_cpufv() asus-wmi: check for temp1 presence asus-wmi: add thermal sensor ...
2011-08-06lib/sha1: use the git implementation of SHA-1Mandeep Singh Baines
For ChromiumOS, we use SHA-1 to verify the integrity of the root filesystem. The speed of the kernel sha-1 implementation has a major impact on our boot performance. To improve boot performance, we investigated using the heavily optimized sha-1 implementation used in git. With the git sha-1 implementation, we see a 11.7% improvement in boot time. 10 reboots, remove slowest/fastest. Before: Mean: 6.58 seconds Stdev: 0.14 After (with git sha-1, this patch): Mean: 5.89 seconds Stdev: 0.07 The other cool thing about the git SHA-1 implementation is that it only needs 64 bytes of stack for the workspace while the original kernel implementation needed 320 bytes. Signed-off-by: Mandeep Singh Baines <msb@chromium.org> Cc: Ramsay Jones <ramsay@ramsay1.demon.co.uk> Cc: Nicolas Pitre <nico@cam.org> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: David S. Miller <davem@davemloft.net> Cc: linux-crypto@vger.kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-08-05Add KEY_MICMUTE and enable it on Lenovo X220Andy Lutomirski
I suspect that this works on T410. Signed-off-by: Andy Lutomirski <luto@mit.edu> Signed-off-by: Matthew Garrett <mjg@redhat.com>
2011-08-05Merge branch 'drm-fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 * 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6: (55 commits) Revert "drm/i915: Try enabling RC6 by default (again)" drm/radeon: Extended DDC Probing for ECS A740GM-M DVI-D Connector drm/radeon: Log Subsystem Vendor and Device Information drm/radeon: Extended DDC Probing for Connectors with Improperly Wired DDC Lines (here: Asus M2A-VM HDMI) drm: Separate EDID Header Check from EDID Block Check drm: Add NULL check about irq functions drm: Fix irq install error handling drm/radeon: fix potential NULL dereference in drivers/gpu/drm/radeon/atom.c drm/radeon: clean reg header files drm/debugfs: Initialise empty variable drm/radeon/kms: add thermal chip quirk for asus 9600xt drm/radeon: off by one in check_reg() functions drm/radeon/kms: fix version comment due to merge timing drm/i915: allow cache sharing policy control drm/i915/hdmi: HDMI source product description infoframe support drm/i915/hdmi: split infoframe setting from infoframe type code drm: track CEA version number if present drm/i915: Try enabling RC6 by default (again) Revert "drm/i915/dp: Zero the DPCD data before connection probe" drm/i915/dp: wait for previous AUX channel activity to clear ...
2011-08-05Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (54 commits) ipv6: check for IPv4 mapped addresses when connecting IPv6 sockets mlx4: decreasing ref count when removing mac net: Fix security_socket_sendmsg() bypass problem. net: Cap number of elements for sendmmsg net: sendmmsg should only return an error if no messages were sent ixgbe: fix PHY link setup for 82599 ixgbe: fix __ixgbe_notify_dca() bail out code igb: fix WOL on second port of i350 device e1000e: minor re-order of #include files e1000e: remove unnecessary check for NULL pointer intel drivers: repair missing flush operations macb: restore wrap bit when performing underrun cleanup cdc_ncm: fix endianness problem. irda: use PCI_VENDOR_ID_* mlx4: Fixing Ethernet unicast packet steering net: fix NULL dereferences in check_peer_redir() bnx2x: Clear MDIO access warning during first driver load bnx2x: Fix BCM578xx MAC test bnx2x: Fix BCM54618se invalid link indication bnx2x: Fix BCM84833 link ...
2011-08-05Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: RCUify freeing acls, let check_acl() go ahead in RCU mode if acl is cached get rid of boilerplate switches in posix_acl.h fix block device fallout from ->fsync() changes
2011-08-05Merge branch 'next' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx: dmaengine: use DEFINE_IDR for static initialization ioat: fix xor_idx_to_desc Avoid section type conflict in dma/ioat/dma_v3.c ioat: Adding PCI IDs for IOAT devices on SandyBridge platforms
2011-08-04nfs_xdr: Move nfs4_string definition out of #ifdef CONFIG_NFS_V4Boaz Harrosh
exofs file system wants to use pnfs_osd_xdr.h file instead of redefining pnfs-objects types in it's private "pnfs.h" headr. Before we do the switch we must make sure pnfs_osd_xdr.h is compilable also under NFS versions smaller than 4.1. Since now it is needed regardless of version, by the exofs code. nfs4_string is not the only nfs4 type out in the global scope. Ack-by: Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
2011-08-04Merge branch 'devicetree/merge' of git://git.secretlab.ca/git/linux-2.6Linus Torvalds
* 'devicetree/merge' of git://git.secretlab.ca/git/linux-2.6: Revert "dt: add of_alias_scan and of_alias_get_id" dt: remove of_alias_get_id() reference
2011-08-04drm: Separate EDID Header Check from EDID Block CheckThomas Reim
Provides function drm_edid_header_is_valid() for EDID header check and replaces EDID header check part of function drm_edid_block_valid() by a call of drm_edid_header_is_valid(). This is a prerequisite to extend DDC probing, e. g. in function radeon_ddc_probe() for Radeon devices, by a central EDID header check. Tested for kernel 2.6.35, 2.6.38 and 3.0 Cc: <stable@kernel.org> Signed-off-by: Thomas Reim <reimth@gmail.com> Reviewed-by: Alex Deucher <alexdeucher@gmail.com> Acked-by: Stephen Michaels <Stephen.Micheals@gmail.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
2011-08-04Merge branch 'drm-intel-next' of ↵Dave Airlie
ssh://master.kernel.org/pub/scm/linux/kernel/git/keithp/linux-2.6 into drm-fixes * 'drm-intel-next' of ssh://master.kernel.org/pub/scm/linux/kernel/git/keithp/linux-2.6: (42 commits) drm/i915: allow cache sharing policy control drm/i915/hdmi: HDMI source product description infoframe support drm/i915/hdmi: split infoframe setting from infoframe type code drm: track CEA version number if present drm/i915: Try enabling RC6 by default (again) Revert "drm/i915/dp: Zero the DPCD data before connection probe" drm/i915/dp: wait for previous AUX channel activity to clear drm/i915: don't use uninitialized EDID bpc values when picking pipe bpp drm/i915/pch: Save/restore PCH_PORT_HOTPLUG across suspend drm/i915: apply phase pointer override on SNB+ too drm/i915: Add quirk to disable SSC on Sony Vaio Y2 drm/i915: provide more error output when mode sets fail drm/i915: add GPU max frequency control file i915: add Dell OptiPlex FX170 to intel_no_lvds drm/i915: Ignore GPU wedged errors while pinning scanout buffers drm/i915/hdmi: send AVI info frames on ILK+ as well drm/i915: fix CB tuning check for ILK+ drm/i915: Flush other plane register writes drm/i915: flush plane control changes on ILK+ as well drm/i915: apply timing generator bug workaround on CPT and PPT ...
2011-08-04Revert "dt: add of_alias_scan and of_alias_get_id"Grant Likely
This reverts commit 750f463a749e28464151ad26938d11b07b1c43cb. of_alias_* still needs work to be generalized for 'promtree' dt platforms, and to no implicitly create entries for available ids. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-08-04Merge branch 'idle-release' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-idle-2.6 * 'idle-release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-idle-2.6: cpuidle: stop depending on pm_idle x86 idle: move mwait_idle_with_hints() to where it is used cpuidle: replace xen access to x86 pm_idle and default_idle cpuidle: create bootparam "cpuidle.off=1" mrst_pmu: driver for Intel Moorestown Power Management Unit
2011-08-04Merge branch 'apei-release' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 * 'apei-release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: ACPI, APEI, EINJ Param support is disabled by default APEI GHES: 32-bit buildfix ACPI: APEI build fix ACPI, APEI, GHES: Add hardware memory error recovery support HWPoison: add memory_failure_queue() ACPI, APEI, GHES, Error records content based throttle ACPI, APEI, GHES, printk support for recoverable error via NMI lib, Make gen_pool memory allocator lockless lib, Add lock-less NULL terminated single list Add Kconfig option ARCH_HAVE_NMI_SAFE_CMPXCHG ACPI, APEI, Add WHEA _OSC support ACPI, APEI, Add APEI bit support in generic _OSC call ACPI, APEI, GHES, Support disable GHES at boot time ACPI, APEI, GHES, Prevent GHES to be built as module ACPI, APEI, Use apei_exec_run_optional in APEI EINJ and ERST ACPI, APEI, Add apei_exec_run_optional ACPI, APEI, GHES, Do not ratelimit fatal error printk before panic ACPI, APEI, ERST, Fix erst-dbg long record reading issue ACPI, APEI, ERST, Prevent erst_dbg from loading if ERST is disabled
2011-08-04Merge branch 'devicetree/next' of git://git.secretlab.ca/git/linux-2.6Linus Torvalds
* 'devicetree/next' of git://git.secretlab.ca/git/linux-2.6: dt: add of_alias_scan and of_alias_get_id
2011-08-04drm: track CEA version number if presentJesse Barnes
Drivers need to know the CEA version number in addition to other display info (like whether the display is an HDMI sink) before enabling certain features. So track the CEA version number in the display info structure. Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Keith Packard <keithp@keithp.com>
2011-08-04tmpfs radix_tree: locate_item to speed up swapoffHugh Dickins
We have already acknowledged that swapoff of a tmpfs file is slower than it was before conversion to the generic radix_tree: a little slower there will be acceptable, if the hotter paths are faster. But it was a shock to find swapoff of a 500MB file 20 times slower on my laptop, taking 10 minutes; and at that rate it significantly slows down my testing. Now, most of that turned out to be overhead from PROVE_LOCKING and PROVE_RCU: without those it was only 4 times slower than before; and more realistic tests on other machines don't fare as badly. I've tried a number of things to improve it, including tagging the swap entries, then doing lookup by tag: I'd expected that to halve the time, but in practice it's erratic, and often counter-productive. The only change I've so far found to make a consistent improvement, is to short-circuit the way we go back and forth, gang lookup packing entries into the array supplied, then shmem scanning that array for the target entry. Scanning in place doubles the speed, so it's now only twice as slow as before (or three times slower when the PROVEs are on). So, add radix_tree_locate_item() as an expedient, once-off, single-caller hack to do the lookup directly in place. #ifdef it on CONFIG_SHMEM and CONFIG_SWAP, as much to document its limited applicability as save space in other configurations. And, sadly, #include sched.h for cond_resched(). Signed-off-by: Hugh Dickins <hughd@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-08-04tmpfs: use kmemdup for short symlinksHugh Dickins
But we've not yet removed the old swp_entry_t i_direct[16] from shmem_inode_info. That's because it was still being shared with the inline symlink. Remove it now (saving 64 or 128 bytes from shmem inode size), and use kmemdup() for short symlinks, say, those up to 128 bytes. I wonder why mpol_free_shared_policy() is done in shmem_destroy_inode() rather than shmem_evict_inode(), where we usually do such freeing? I guess it doesn't matter, and I'm not into NUMA mpol testing right now. Signed-off-by: Hugh Dickins <hughd@google.com> Acked-by: Rik van Riel <riel@redhat.com> Reviewed-by: Pekka Enberg <penberg@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-08-04tmpfs: convert mem_cgroup shmem to radix-swapHugh Dickins
Remove mem_cgroup_shmem_charge_fallback(): it was only required when we had to move swappage to filecache with GFP_NOWAIT. Remove the GFP_NOWAIT special case from mem_cgroup_cache_charge(), by moving its call out from shmem_add_to_page_cache() to two of thats three callers. But leave it doing mem_cgroup_uncharge_cache_page() on error: although asymmetrical, it's easier for all 3 callers to handle. These two changes would also be appropriate if anyone were to start using shmem_read_mapping_page_gfp() with GFP_NOWAIT. Remove mem_cgroup_get_shmem_target(): mc_handle_file_pte() can test radix_tree_exceptional_entry() to get what it needs for itself. Signed-off-by: Hugh Dickins <hughd@google.com> Acked-by: Rik van Riel <riel@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-08-04tmpfs: miscellaneous trivial cleanupsHugh Dickins
While it's at its least, make a number of boring nitpicky cleanups to shmem.c, mostly for consistency of variable naming. Things like "swap" instead of "entry", "pgoff_t index" instead of "unsigned long idx". And since everything else here is prefixed "shmem_", better change init_tmpfs() to shmem_init(). Signed-off-by: Hugh Dickins <hughd@google.com> Acked-by: Rik van Riel <riel@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>