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2013-04-08fmd: fmd19 integrationMandy Lavi
Add fmd19 codebase, plus a minimal set of sources from dpaa-eth, necessary for bare compilation Change-Id: I390df8717671204e3d98a987135393bef4534e95 Signed-off-by: Mandy Lavi <mandy.lavi@freescale.com> Signed-off-by: Bogdan Hamciuc <bogdan.hamciuc@freescale.com> Reviewed-on: http://git.am.freescale.net:8181/1029 Reviewed-by: Fleming Andrew-AFLEMING <AFLEMING@freescale.com> Tested-by: Fleming Andrew-AFLEMING <AFLEMING@freescale.com>
2013-04-08phy/marvell: select copper registers in SGMII to copper modeMadalin Bucur
For the Marvel 88e1111 PHY only two SGMII modes are available, both allowing only SGMII to copper mode (with or without clock). SGMII to fiber mode is not supported. Make sure the fiber/copper registers selector bit is cleared, selecting copper mode registers. The bit is found set after the Auto-Negotiation restart erratum is performed. Change-Id: I21c829260e0f2440f66170d5d8721e7569d8154d Signed-off-by: Madalin Bucur <madalin.bucur@freescale.com> (cherry picked from commit 2db23c6bd45fc4e6833dd86bb3ca28e37199b6ba) Reviewed-on: http://git.am.freescale.net:8181/1028 Reviewed-by: Fleming Andrew-AFLEMING <AFLEMING@freescale.com> Tested-by: Fleming Andrew-AFLEMING <AFLEMING@freescale.com>
2013-04-05Merge tag 'v3.8.4-rt2'Scott Wood
2013-04-05phylib: Fix compile errors on xgmac_mdioBogdan Hamciuc
To be squashed with original commit 3c7bc7d99 Signed-off-by: Bogdan Hamciuc <bogdan.hamciuc@freescale.com> Change-Id: Ifa7cd8d12c4f3f460d1dffbacbd6b7857bb54364 Reviewed-on: http://git.am.freescale.net:8181/1027 Reviewed-by: Fleming Andrew-AFLEMING <AFLEMING@freescale.com> Tested-by: Fleming Andrew-AFLEMING <AFLEMING@freescale.com>
2013-04-05gianfar: Add support for nfc rx-flow hashing based on SPIClaudiu Manoil
Program the filer to perform hashing based on SPI (Secutity Parameter Index) for the AH/ESP incoming packets. The aim is to speed up processing of IPSEC flows on eTSEC platforms, by distributing them to separate Rx queues which gives the possibility to process the flows on separate CPUs. Signed-off-by: Pankaj Chauhan <pankaj.chauhan@freescale.com> Signed-off-by: Claudiu Manoil <claudiu.manoil@freescale.com> Change-Id: I9c7525b18589e28bb819a8bff7310c4f0ce08765 Reviewed-on: http://git.am.freescale.net:8181/1009 Reviewed-by: Fleming Andrew-AFLEMING <AFLEMING@freescale.com> Tested-by: Fleming Andrew-AFLEMING <AFLEMING@freescale.com>
2013-04-05gianfar: Fix Rx/Tx ring sizes setup by ethtool -GClaudiu Manoil
Remove the assumption that num_rx_queues==num_tx_queues from ethtool -G option. Rx and Tx ring sizes shall be configured independently by ethtool, according to the corresponding num_rx_queues and resp. num_tx_queues values. Signed-off-by: Claudiu Manoil <claudiu.manoil@freescale.com> Change-Id: I0e2af163eb37637b373e2fe49d14bfe2bfdfbd68 Reviewed-on: http://git.am.freescale.net:8181/983 Reviewed-by: Fleming Andrew-AFLEMING <AFLEMING@freescale.com> Tested-by: Fleming Andrew-AFLEMING <AFLEMING@freescale.com>
2013-04-05iommu/fsl: PAMU driver fixes.Varun Sethi
This patch contains the following fixes: 1. Support for finding guts node on T4 & B4 platforms. 2. Make iova dma_addr_t constistent with iova_to_phys API change. 3. Disable SPAACE while reconfiguring it. 4. Make API and internal function static. 5. Free data pointer in case of an error. 6. Update comment description and remove unneeded comment. Signed-off-by: Varun Sethi <Varun.Sethi@freescale.com> Change-Id: I4763d9783e9f3d8057c991ca424e48e337c20f3b Reviewed-on: http://git.am.freescale.net:8181/884 Reviewed-by: Yoder Stuart-B08248 <stuart.yoder@freescale.com> Reviewed-by: Fleming Andrew-AFLEMING <AFLEMING@freescale.com> Tested-by: Fleming Andrew-AFLEMING <AFLEMING@freescale.com>
2013-04-05iommu/fsl: Make iova dma_addr_t in the iova_to_phys API.Varun Sethi
Make iova dma_addr_t instead of u64. dma_addrt_t is more appropriate in our case as it is a DMA address. Also, as we support 64 bit physical addresses dma_addr_t is u64 even on 32 bit e500mc based platforms. Signed-off-by: Varun Sethi <Varun.Sethi@freescale.com> Change-Id: Icbb83a6eae00a2be86c20b272eb537b095173f36 Reviewed-on: http://git.am.freescale.net:8181/883 Reviewed-by: Yoder Stuart-B08248 <stuart.yoder@freescale.com> Reviewed-by: Fleming Andrew-AFLEMING <AFLEMING@freescale.com> Tested-by: Fleming Andrew-AFLEMING <AFLEMING@freescale.com>
2013-04-05TDM: QUICC Engine UCC TDM test moduleXu Jiucheng
This is a small test module to transfer and receive data via tdm. It also supports zarlink LM card phone call. Signed-off-by: Jiucheng Xu <Jiucheng.Xu@freescale.com> Signed-off-by: Kai.Jiang <Kai.Jiang@freescale.com> Signed-off-by: Xie Xiaobo <X.Xie@freescale.com> Signed-off-by: Li Yang <leoli@freescale.com> Change-Id: I47396d43b37e31e8de926af353dadfdaf637f13f Reviewed-on: http://git.am.freescale.net:8181/906 Reviewed-by: Fleming Andrew-AFLEMING <AFLEMING@freescale.com> Tested-by: Fleming Andrew-AFLEMING <AFLEMING@freescale.com>
2013-04-05TDM: Add fsl pq-mds-t1 card supportJiucheng Xu
The patch enable Freescale PQ-MDS-T1 card to work in T1 or E1 mode. This card is connected to the board by PMC socket, it aslo supports Line Module extended e.g. zarlink,le88266, we can use "fsl,card_support" in dts to select which module you want. Signed-off-by: Jiucheng Xu <Jiucheng.Xu@freescale.com> Signed-off-by: Kai.Jiang <Kai.Jiang@freescale.com> Signed-off-by: Xie Xiaobo <X.Xie@freescale.com> Change-Id: I3f39fed84e137f7a19859935dbf71fac01330b47 Reviewed-on: http://git.am.freescale.net:8181/905 Reviewed-by: Fleming Andrew-AFLEMING <AFLEMING@freescale.com> Tested-by: Fleming Andrew-AFLEMING <AFLEMING@freescale.com>
2013-04-05TDM: Add a directly R/W API for tdm coreJiucheng Xu
Tdm core exported the simple function interfaces for user in kernel space. Signed-off-by: Jiucheng Xu <Jiucheng.Xu@freescale.com> Signed-off-by: Kai.Jiang <Kai.Jiang@freescale.com> Signed-off-by: Haiying Wang <Haiying.Wang@freescale.com> Signed-off-by: Xie Xiaobo <X.Xie@freescale.com> Change-Id: Ifc8ef6b14f7cbc3c88fcfc5e4a1afd59564d8059 Reviewed-on: http://git.am.freescale.net:8181/904 Reviewed-by: Fleming Andrew-AFLEMING <AFLEMING@freescale.com> Tested-by: Fleming Andrew-AFLEMING <AFLEMING@freescale.com>
2013-04-05powerpc/qe: UCC transparent and TSA function support for TDMJiucheng Xu
This patch enabled UCC as transparent controller, working in continue mode, and enabled TSA A/B/C/D ports to send and receive data from UCC. This TDM function can transfer and receive data at different time slot based on tdm dts setting. Different UCC and TSA port can be binded to one TDM based on dts. Change-Id: I0da63966c82ca7da8e6bfc5fbb37f54596aef52a Signed-off-by: Jiucheng Xu <Jiucheng.Xu@freescale.com> Signed-off-by: Kai.Jiang <Kai.Jiang@freescale.com> Signed-off-by: Haiying Wang <Haiying.Wang@freescale.com> Signed-off-by: Xie Xiaobo <X.Xie@freescale.com> Reviewed-on: http://git.am.freescale.net:8181/903 Reviewed-by: Fleming Andrew-AFLEMING <AFLEMING@freescale.com> Tested-by: Fleming Andrew-AFLEMING <AFLEMING@freescale.com>
2013-04-04mmc:block Add Fixup of BROKEN CMD23 for SANDISK cardHaijun.Zhang
Some sandisk card can't support CMD23, cmd timeout will generate. SO add FIX-UP for two type of these Sandisk cards. "SDMB-32" and "SDM032" Error log: mmcblk0: timed out sending SET_BLOCK_COUNT command, card status 0x400900 mmcblk0: timed out sending SET_BLOCK_COUNT command, card status 0x400900 mmcblk0: timed out sending SET_BLOCK_COUNT command, card status 0x400900 end_request: I/O error, dev mmcblk0, sector 0 Buffer I/O error on device mmcblk0, logical block 0 mmcblk0: timed out sending SET_BLOCK_COUNT command, card status 0x400900 Signed-off-by: Jerry Huang <Chang-Ming.Huang@freescale.com> Signed-off-by: Haijun Zhang <Haijun.Zhang@freescale.com> Change-Id: I14efdaa447b9c683a7a0bc3444a58df030112806 Reviewed-on: http://git.am.freescale.net:8181/886 Reviewed-by: Fleming Andrew-AFLEMING <AFLEMING@freescale.com> Tested-by: Fleming Andrew-AFLEMING <AFLEMING@freescale.com>
2013-04-04kconfig-disable-a-few-options-rt.patchThomas Gleixner
Disable stuff which is known to have issues on RT Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-04-04mmci: Remove bogus local_irq_save()Thomas Gleixner
On !RT interrupt runs with interrupts disabled. On RT it's in a thread, so no need to disable interrupts at all. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-04-04gpu/i915: don't open code these thingsSebastian Andrzej Siewior
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2013-04-04spi/omap-mcspi: check condition also after timeoutSebastian Andrzej Siewior
It is possible that the handler gets interrupted after checking the status. After it resumes it the time out is due but the condition it was waiting for might be true. Therefore it is necessary to check the condition in case of an time out to be sure that the condition is not true _and_ the time passed by. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2013-04-04i2c/omap: drop the lock hard irq contextSebastian Andrzej Siewior
The lock is taken while reading two registers. On RT the first lock is taken in hard irq where it might sleep and in the threaded irq. The threaded irq runs in oneshot mode so the hard irq does not run until the thread the completes so there is no reason to grab the lock. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2013-04-04random: Make it work on rtThomas Gleixner
Delegate the random insertion to the forced threaded interrupt handler. Store the return IP of the hard interrupt handler in the irq descriptor and feed it into the random generator as a source of entropy. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: stable-rt@vger.kernel.org
2013-04-04scsi: qla2xxx: Use local_irq_save_nort() in qla2x00_pollJohn Kacur
RT triggers the following: [ 11.307652] [<ffffffff81077b27>] __might_sleep+0xe7/0x110 [ 11.307663] [<ffffffff8150e524>] rt_spin_lock+0x24/0x60 [ 11.307670] [<ffffffff8150da78>] ? rt_spin_lock_slowunlock+0x78/0x90 [ 11.307703] [<ffffffffa0272d83>] qla24xx_intr_handler+0x63/0x2d0 [qla2xxx] [ 11.307736] [<ffffffffa0262307>] qla2x00_poll+0x67/0x90 [qla2xxx] Function qla2x00_poll does local_irq_save() before calling qla24xx_intr_handler which has a spinlock. Since spinlocks are sleepable on rt, it is not allowed to call them with interrupts disabled. Therefore we use local_irq_save_nort() instead which saves flags without disabling interrupts. This fix needs to be applied to v3.0-rt, v3.2-rt and v3.4-rt Suggested-by: Thomas Gleixner Signed-off-by: John Kacur <jkacur@redhat.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: David Sommerseth <davids@redhat.com> Link: http://lkml.kernel.org/r/1335523726-10024-1-git-send-email-jkacur@redhat.com Cc: stable-rt@vger.kernel.org Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-04-04dm: Make rt awareThomas Gleixner
Use the BUG_ON_NORT variant for the irq_disabled() checks. RT has interrupts legitimately enabled here as we cant deadlock against the irq thread due to the "sleeping spinlocks" conversion. Reported-by: Luis Claudio R. Goncalves <lclaudio@uudg.org> Cc: stable-rt@vger.kernel.org Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-04-04scsi-fcoe-rt-aware.patchThomas Gleixner
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-04-04kgdb/serial: Short term workaroundJason Wessel
On 07/27/2011 04:37 PM, Thomas Gleixner wrote: > - KGDB (not yet disabled) is reportedly unusable on -rt right now due > to missing hacks in the console locking which I dropped on purpose. > To work around this in the short term you can use this patch, in addition to the clocksource watchdog patch that Thomas brewed up. Comments are welcome of course. Ultimately the right solution is to change separation between the console and the HW to have a polled mode + work queue so as not to introduce any kind of latency. Thanks, Jason.
2013-04-04ARM: at91: tclib: Default to tclib timer for RTThomas Gleixner
RT is not too happy about the shared timer interrupt in AT91 devices. Default to tclib timer for RT. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-04-04rt: Improve the serial console PASS_LIMITIngo Molnar
Beyond the warning: drivers/tty/serial/8250/8250.c:1613:6: warning: unused variable ‘pass_counter’ [-Wunused-variable] the solution of just looping infinitely was ugly - up it to 1 million to give it a chance to continue in some really ugly situation. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-04-04drivers-tty-pl011-irq-disable-madness.patchThomas Gleixner
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-04-04drivers-tty-fix-omap-lock-crap.patchThomas Gleixner
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-04-04serial: 8250: Call flush_to_ldisc when the irq is threadedIngo Molnar
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2013-04-04serial: 8250: Clean up the locking for -rtIngo Molnar
Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-04-04md: raid5: Make raid5_percpu handling RT awareThomas Gleixner
__raid_run_ops() disables preemption with get_cpu() around the access to the raid5_percpu variables. That causes scheduling while atomic spews on RT. Serialize the access to the percpu data with a lock and keep the code preemptible. Reported-by: Udo van den Heuvel <udovdh@xs4all.nl> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Udo van den Heuvel <udovdh@xs4all.nl>
2013-04-04USB: Fix the mouse problem when copying large amounts of dataWu Zhangjin
When copying large amounts of data between the USB storage devices and the hard disk, the USB mouse will not work, this patch fixes it. [NOTE: This problem have been found in the Loongson family machines, not sure whether it is producible on other platforms] Signed-off-by: Hu Hongbing <huhb@lemote.com> Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
2013-04-04drivers: net: gianfar: Make RT awareThomas Gleixner
The adjust_link() disables interrupts before taking the queue locks. On RT those locks are converted to "sleeping" locks and therefor the local_irq_save/restore must be converted to local_irq_save/restore_nort. Reported-by: Xianghua Xiao <xiaoxianghua@gmail.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Xianghua Xiao <xiaoxianghua@gmail.com>
2013-04-04drivers/net: vortex fix locking issuesSteven Rostedt
Argh, cut and paste wasn't enough... Use this patch instead. It needs an irq disable. But, believe it or not, on SMP this is actually better. If the irq is shared (as it is in Mark's case), we don't stop the irq of other devices from being handled on another CPU (unfortunately for Mark, he pinned all interrupts to one CPU). Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> drivers/net/ethernet/3com/3c59x.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) Signed-off-by: Ingo Molnar <mingo@elte.hu>
2013-04-04drivers/net: fix livelock issuesThomas Gleixner
Preempt-RT runs into a live lock issue with the NETDEV_TX_LOCKED micro optimization. The reason is that the softirq thread is rescheduling itself on that return value. Depending on priorities it starts to monoplize the CPU and livelock on UP systems. Remove it. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-04-04usb: Use local_irq_*_nort() variantsSteven Rostedt
[ tglx: Now that irqf_disabled is dead we should kill that ] Signed-off-by: Steven Rostedt <srostedt@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-04-04input: gameport: Do not disable interrupts on PREEMPT_RTIngo Molnar
Use the _nort() primitives. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-04-04infiniband: Mellanox IB driver patch use _nort() primitivesSven-Thorsten Dietrich
Fixes in_atomic stack-dump, when Mellanox module is loaded into the RT Kernel. Michael S. Tsirkin <mst@dev.mellanox.co.il> sayeth: "Basically, if you just make spin_lock_irqsave (and spin_lock_irq) not disable interrupts for non-raw spinlocks, I think all of infiniband will be fine without changes." Signed-off-by: Sven-Thorsten Dietrich <sven@thebigcorporation.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-04-04ide: Do not disable interrupts for PREEMPT-RTIngo Molnar
Use the local_irq_*_nort variants. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-04-04ata: Do not disable interrupts in ide code for preempt-rtSteven Rostedt
Use the local_irq_*_nort variants. Signed-off-by: Steven Rostedt <srostedt@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-04-04hwlatdetect.patchCarsten Emde
Jon Masters developed this wonderful SMI detector. For details please consult Documentation/hwlat_detector.txt. It could be ported to Linux 3.0 RT without any major change. Signed-off-by: Carsten Emde <C.Emde@osadl.org>
2013-04-04pci: Use __wake_up_all_locked pci_unblock_user_cfg_access()Thomas Gleixner
The waitqueue is protected by the pci_lock, so we can just avoid to lock the waitqueue lock itself. That prevents the might_sleep()/scheduling while atomic problem on RT Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: stable-rt@vger.kernel.org
2013-04-04drivers/net: Use disable_irq_nosync() in 8139tooIngo Molnar
Use disable_irq_nosync() instead of disable_irq() as this might be called in atomic context with netpoll. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-04-04drivers/net: tulip_remove_one needs to call pci_disable_device()Ingo Molnar
Otherwise the device is not completely shut down. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-04-04clocksource: TCLIB: Allow higher clock rates for clock eventsBenedikt Spranger
As default the TCLIB uses the 32KiHz base clock rate for clock events. Add a compile time selection to allow higher clock resulution. Signed-off-by: Benedikt Spranger <b.spranger@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-04-04drivers: random: Reduce preempt disabled regionIngo Molnar
No need to keep preemption disabled across the whole function. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-04-04of: fix recursive locking in of_get_next_available_child()Stephen Warren
of_get_next_available_child() acquires devtree_lock, then calls of_device_is_available() which calls of_get_property() which calls of_find_property() which tries to re-acquire devtree_lock, thus causing deadlock. To avoid this, create a new __of_device_is_available() which calls __of_get_property() instead, which calls __of_find_property(), which does not take the lock,. Update of_get_next_available_child() to call the new __of_device_is_available() since it already owns the lock. Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2013-04-04intel_idle: Convert i7300_idle_lock to raw spinlockMike Galbraith
24 core Intel box's first exposure to 3.0.12-rt30-rc3 didn't go well. [ 27.104159] i7300_idle: loaded v1.55 [ 27.104192] BUG: scheduling while atomic: swapper/2/0/0x00000002 [ 27.104309] Pid: 0, comm: swapper/2 Tainted: G N 3.0.12-rt30-rc3-rt #1 [ 27.104317] Call Trace: [ 27.104338] [<ffffffff810046a5>] dump_trace+0x85/0x2e0 [ 27.104372] [<ffffffff8144eb00>] thread_return+0x12b/0x30b [ 27.104381] [<ffffffff8144f1b9>] schedule+0x29/0xb0 [ 27.104389] [<ffffffff814506e5>] rt_spin_lock_slowlock+0xc5/0x240 [ 27.104401] [<ffffffffa01f818f>] i7300_idle_notifier+0x3f/0x360 [i7300_idle] [ 27.104415] [<ffffffff814546c7>] notifier_call_chain+0x37/0x70 [ 27.104426] [<ffffffff81454748>] __atomic_notifier_call_chain+0x48/0x70 [ 27.104439] [<ffffffff81001a39>] cpu_idle+0x89/0xb0 [ 27.104449] bad: scheduling from the idle thread! Signed-off-by: Mike Galbraith <efault@gmx.de> Cc: Steven Rostedt <rostedt@goodmis.org> Link: http://lkml.kernel.org/r/1323258522.5057.73.camel@marge.simson.net Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-04-04locking-various-init-fixes.patchThomas Gleixner
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2013-04-04OF: Convert devtree lock from rw_lock to raw spinlockThomas Gleixner
With the locking cleanup in place (from "OF: Fixup resursive locking code paths"), we can now do the conversion from the rw_lock to a raw spinlock as required for preempt-rt. The previous cleanup and this conversion were originally separate since they predated when mainline got raw spinlock (in commit c2f21ce2e31286a "locking: Implement new raw_spinlock"). So, at that point in time, the cleanup was considered plausible for mainline, but not this conversion. In any case, we've kept them separate as it makes for easier review and better bisection. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Grant Likely <grant.likely@secretlab.ca> Cc: Sam Ravnborg <sam@ravnborg.org> Cc: <devicetree-discuss@lists.ozlabs.org> Cc: Rob Herring <rob.herring@calxeda.com> Link: http://lkml.kernel.org/r/1360182656-15898-1-git-send-email-paul.gortmaker@windriver.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de> [PG: taken from preempt-rt, update subject & add a commit log] Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2013-04-04OF: Fixup resursive locking code pathsThomas Gleixner
There is no real reason to use a rwlock for devtree_lock. It even could be a mutex, but unfortunately it's locked from cpu hotplug paths which can't schedule :( So it needs to become a raw lock on rt as well. The devtree_lock would be the only user of a raw_rw_lock, so we are better off cleaning up the recursive locking paths which allows us to convert devtree_lock to a read_lock. Here we do the standard thing of introducing __foo() as the "raw" version of foo(), so that we can take better control of the locking. The "raw" versions are not exported and are for internal use within the file itself. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: devicetree-discuss@lists.ozlabs.org Cc: Grant Likely <grant.likely@secretlab.ca> Cc: Rob Herring <rob.herring@calxeda.com> Link: http://lkml.kernel.org/r/1359138107-14159-1-git-send-email-paul.gortmaker@windriver.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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