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* [PATCH] dm: remove SECTOR_FORMATAndrew Morton2006-03-27
| | | | | | | | | | | | | We don't know what type sector_t has. Sometimes it's unsigned long, sometimes it's unsigned long long. For example on ppc64 it's unsigned long with CONFIG_LBD=n and on x86_64 it's unsigned long long with CONFIG_LBD=n. The way to handle all of this is to always use unsigned long long and to always typecast the sector_t when printing it. Acked-by: Alasdair G Kergon <agk@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] drivers/md/dm-raid1.c: Fix inconsistent mirroring after interrupted ↵Jun'ichi Nomura2006-03-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | recovery dm-mirror has potential data corruption problem: while on-disk log shows that all disk contents are in-sync, actual contents of the disks are not synchronized. This problem occurs if initial recovery (synching) is interrupted and resumed. Attached patch fixes this problem. Background: rh_dec() changes the region state from RH_NOSYNC (out-of-sync) to RH_CLEAN (in-sync), which results in the corresponding bit of clean_bits being set. This is harmful if on-disk log is used and the map is removed/suspended before the initial sync is completed. The clean_bits is written down to the on-disk log at the map removal, and, upon resume, it's read and copied to sync_bits. Since the recovery process refers to the sync_bits to find a region to be recovered, the region whose state was changed from RH_NOSYNC to RH_CLEAN is no longer recovered. If you haven't applied dm-raid1-read-balancing.patch proposed in dm-devel sometimes ago, the contents of the mirrored disk just corrupt silently. If you have, balanced read may get bogus data from out-of-sync disks. The patch keeps RH_NOSYNC state unchanged. It will be changed to RH_RECOVERING when recovery starts and get reclaimed when the recovery completes. So it doesn't leak the region hash entry. Description: Keep RH_NOSYNC state unchanged when I/O on the region completes. rh_dec() changes the region state from RH_NOSYNC (out-of-sync) to RH_CLEAN (in-sync), which results in the corresponding bit of clean_bits being set. This is harmful if on-disk log is used and the map is removed/suspended before the initial sync is completed. The clean_bits is written down to the on-disk log at the map removal, and, upon resume, it's read and copied to sync_bits. Since the recovery process refers to the sync_bits to find a region to be recovered, the region whose state was changed from RH_NOSYNC to RH_CLEAN is no longer recovered. If you haven't applied dm-raid1-read-balancing.patch proposed in dm-devel sometimes ago, the contents of the mirrored disk just corrupt silently. If you have, balanced read may get bogus data from out-of-sync disks. The RH_NOSYNC region will be changed to RH_RECOVERING when recovery starts on the region and get reclaimed when the recovery completes. So it doesn't leak the region hash entry. Alasdair said: I've analysed the relevant part of the state machine and I believe that the patch is correct. (Further work on this code is still needed - this patch has the side-effect of holding onto memory unnecessarily for long periods of time under certain workloads - but better that than corrupting data.) Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com> Acked-by: Alasdair G Kergon <agk@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] device-mapper snapshot: fix invalidationAlasdair G Kergon2006-03-27
| | | | | | | | | | | | | | | | | When a snapshot becomes invalid, s->valid is set to 0. In this state, a snapshot can no longer be accessed. When s->lock is acquired, before doing anything else, s->valid must be checked to ensure the snapshot remains valid. This patch eliminates some races (that may cause panics) by adding some missing checks. At the same time, some unnecessary levels of indentation are removed and snapshot invalidation is moved into a single function that always generates a device-mapper event. Signed-off-by: Alasdair G Kergon <agk@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] device-mapper snapshot: replace sibling listAlasdair G Kergon2006-03-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The siblings "list" is used unsafely at the moment. Firstly, only the element on the list being changed gets locked (via the snapshot lock), not the next and previous elements which have pointers that are also being changed. Secondly, if you have two or more snapshots and write to the same chunk a second time before every snapshot has finished making its private copy of the data, if you're unlucky, _origin_write() could attempt its list_merge() and dereference a 'last' pointer to a pending_exception structure that has just been freed. Analysis reveals that the list is actually only there for reference counting. If 5 pending_exceptions are needed in origin_write, then the 5 are joined together into a 5-element list - without a separate list head because there's nowhere suitable to store it. As the pending_exceptions complete, they are removed from the list one-by-one and any contents of origin_bios get moved across to one of the remaining pending_exceptions on the list. Whichever one is last is detected because list_empty() is then true and the origin_bios get submitted. The fix proposed here uses an alternative reference counting mechanism by choosing one of the pending_exceptions as primary and maintaining an atomic counter there. Signed-off-by: Alasdair G Kergon <agk@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] device-mapper snapshot: fix origin_write pending_exception submissionAlasdair G Kergon2006-03-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Say you have several snapshots of the same origin and then you issue a write to some place in the origin for the first time. Before the device-mapper snapshot target lets the write go through to the underlying device, it needs to make a copy of the data that is about to be overwritten. Each snapshot is independent, so it makes one copy for each snapshot. __origin_write() loops through each snapshot and checks to see whether a copy is needed for that snapshot. (A copy is only needed the first time that data changes.) If a copy is needed, the code allocates a 'pending_exception' structure holding the details. It links these together for all the snapshots, then works its way through this list and submits the copying requests to the kcopyd thread by calling start_copy(). When each request is completed, the original pending_exception structure gets freed in pending_complete(). If you're very unlucky, this structure can get freed *before* the submission process has finished walking the list. This patch: 1) Creates a new temporary list pe_queue to hold the pending exception structures; 2) Does all the bookkeeping up-front, then walks through the new list safely and calls start_copy() for each pending_exception that needed it; 3) Avoids attempting to add pe->siblings to the list if it's already connected. [NB This does not fix all the races in this code. More patches will follow.] Signed-off-by: Alasdair G Kergon <agk@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] video/sis/init301.c:SiS_ChrontelDoSomething2(): remove dead codeAdrian Bunk2006-03-27
| | | | | | | | | | The Coverity checker spotted these two unused variables. Signed-off-by: Adrian Bunk <bunk@stusta.de> Cc: "Antonino A. Daplas" <adaplas@pol.net> Cc: Thomas Winischhofer <thomas@winischhofer.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] drivers/video: Use ARRAY_SIZE macroTobias Klauser2006-03-27
| | | | | | | | | | | | | Use ARRAY_SIZE macro instead of sizeof(x)/sizeof(x[0]) and remove duplicates of ARRAY_SIZE. Some coding style and trailing whitespaces are also fixed. Compile-tested where possible (some are other arch or BROKEN) Signed-off-by: Tobias Klauser <tklauser@nuerscht.ch> Cc: "Antonino A. Daplas" <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] fbdev: add modeline for 1680x1050@60Olaf Hering2006-03-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a modeline for the Philips 200W display. aty128fb does not do DDC, it picks 1920x1440 or similar. It works ok with nvidiafb because it can ask for DDC data. mode "1680x1050-60" # D: 146.028 MHz, H: 65.191 kHz, V: 59.863 Hz geometry 1680 1050 1680 1050 16 timings 6848 280 104 30 3 176 6 hsync high vsync high rgba 5/11,6/5,5/0,0/0 endmode hwinfo --monitor 20: None 00.0: 10000 Monitor [Created at monitor.206] Unique ID: rdCR.pzUFTofo1S4 Parent ID: 002j.bJRsY88eNSC Hardware Class: monitor Model: "PHILIPS Philips 200W" Vendor: PHL "PHILIPS" Device: eisa 0x0832 "Philips 200W" Serial ID: "VN 016596" Resolution: 720x400@70Hz Resolution: 640x480@60Hz Resolution: 640x480@67Hz Resolution: 640x480@72Hz Resolution: 640x480@75Hz Resolution: 800x600@56Hz Resolution: 800x600@60Hz Resolution: 800x600@72Hz Resolution: 800x600@75Hz Resolution: 832x624@75Hz Resolution: 1024x768@60Hz Resolution: 1024x768@70Hz Resolution: 1024x768@75Hz Resolution: 1280x1024@75Hz Resolution: 1152x864@70Hz Resolution: 1152x864@75Hz Resolution: 1280x960@60Hz Resolution: 1280x1024@60Hz Resolution: 1680x1050@60Hz Size: 433x271 mm Driver Info #0: Max. Resolution: 1680x1050 Vert. Sync Range: 56-85 Hz Hor. Sync Range: 30-93 kHz Config Status: cfg=new, avail=yes, need=no, active=unknown Attached to: #5 (VGA compatible controller) Signed-off-by: Olaf Hering <olh@suse.de> Acked-by: "Antonino A. Daplas" <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] sparse: Fix warnings in newport driver about non-static functionsRalf Baechle2006-03-27
| | | | | | | | | | There are more sparse warnings but fixing those will require some more work than I want to do without hardware for testing at hand. Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Add ID for Quadro NVS280Pavel Roskin2006-03-27
| | | | | | | | | | Quadro NVS280 is a dual-head PCIe card with PCI ID 10de:00fd and subsystem ID 10de:0215. Signed-off-by: Pavel Roskin <proski@gnu.org> Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] imsttfb: Remove dead codeAntonino A. Daplas2006-03-27
| | | | | | | | | | clk_p is always 0. Coverity Bug 67 Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] atyfb: Remove dead codeAntonino A. Daplas2006-03-27
| | | | | | | | | | Remove code that can never be reached. Coverity Bug 67 Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] savagefb: Remove NULL checkAntonino A. Daplas2006-03-27
| | | | | | | | Remove unnecessary NULL check. Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] i810fb: Remove NULL checkAntonino A. Daplas2006-03-27
| | | | | | | | | Remove unnecessary NULL check. Being a function private to the driver, out_edid can never be NULL. Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] nvidiafb: Remove NULL check #2Antonino A. Daplas2006-03-27
| | | | | | | | Remove unnecessary NULL check. Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] nvidiafb: Remove NULL checkAntonino A. Daplas2006-03-27
| | | | | | | | | | Remove unnecessary NULL check, as struct info will never be NULL. Coverity Bug 835 Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] rivafb: Remove NULL checkAntonino A. Daplas2006-03-27
| | | | | | | | | | Remove unnecessary NULL check, as struct info will never be NULL. Coverity Bug 836 Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] framebuffer: cmap-setting return valuesAlan Curry2006-03-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | A set of 3 small bugfixes, all of which are related to bogus return values of fb colormap-setting functions. First, fb_alloc_cmap returns -1 if memory allocation fails. This is a hard condition to reproduce since you'd have to be really low on memory, but from studying the contexts in which it is called, I think this function should be returning a negative errno, and the -1 will be seen as an EPERM. Switching it to -ENOMEM makes sense. Second, the store_cmap function which is called for writes to /sys/class/graphics/fb0/color_map returns 0 for success, but it should be returning the count of bytes written since its return value ends up in userspace as the result of the write() syscall. Third, radeonfb returns 1 instead of a negative errno when FBIOPUTCMAP is called with an oversized colormap. This is seen in userspace as a return value of 1 from the ioctl() syscall with errno left unchanged. A more useful return value would be -EINVAL. Signed-off-by: Alan Curry <pacman@TheWorld.com> Cc: "Antonino A. Daplas" <adaplas@pol.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] fbdev: Make BIOS EDID reading configurableAntonino A. Daplas2006-03-27
| | | | | | | | | | | DDC reading via the Video BIOS may take several tens of seconds with some combination of display cards and monitors. Make this option configurable. It defaults to `y' to minimise disruption. Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] au1200fb: Alchemy Au1200 framebuffer driverRalf Baechle2006-03-27
| | | | | | | | | Add support for Alchemy Au1200 framebuffer driver Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] matrox maven: memory allocation and other cleanupsJean Delvare2006-03-27
| | | | | | | | | | | | | | | | A few cleanups which were done to almost all i2c drivers some times ago, but matroxfb_maven was forgotten: * Don't allocate two different structures at once. * Use kzalloc instead of kmalloc+memset. * Use strlcpy instead of strcpy. * Drop duplicate error message on client deregistration failure. Signed-off-by: Jean Delvare <khali@linux-fr.org> Acked-by: Petr Vandrovec <vandrove@vc.cvut.cz> Cc: "Antonino A. Daplas" <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] matroxfb: simply return what i2c_add_driver() doesArthur Othieno2006-03-27
| | | | | | | | | | | | | | insmod will tell us when the module failed to load. We do no further processing on the return from i2c_add_driver(), so just return what i2c_add_driver() did, instead of storing it. Add __init/__exit annotations while we're at it. Signed-off-by: Arthur Othieno <apgo@patchbomb.org> Acked-by: Jean Delvare <khali@linux-fr.org> Acked-by: Petr Vandrovec <petr@vandrovec.name> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] fbdev: framebuffer driver for Geode GXDavid Vrabel2006-03-27
| | | | | | | | | | | | | | | A framebuffer driver for the display controller in AMD Geode GX processors (Geode GX533, Geode GX500 etc.). Tested at 640x480, 800x600, 1024x768 and 1280x1024 at 8, 16, and 24 bpp with both CRT and TFT. No accelerated features currently implemented and compression remains disabled. This driver requires that the BIOS (or the SoftVG/Firmbase code in the BIOS) has created an appropriate virtual PCI header. Signed-off-by: David Vrabel <dvrabel@arcom.com> Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] nvidiafb: add suspend and resume hooksAntonino A. Daplas2006-03-27
| | | | | | | | | | | | | | | | | Add suspend and resume hooks to make software suspend more reliable. Resuming from standby should generally work. Resuming from mem and from disk requires that the GPU is disabled. Adding these to the suspend script... fbset -accel false -a /* suspend here */ fbset -accel true -a ... should generally work. In addition, resuming from mem requires that the video card has to be POSTed by the BIOS or some other utility. Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] vgacon: Add support for soft scrollbackAntonino A. Daplas2006-03-27
| | | | | | | | | | | | | | | | | The scrollback buffer of the VGA console is located in VGA RAM. This RAM is fixed in size and is very small. To make the scrollback buffer larger, it must be placed instead in System RAM. This patch adds this feature. The feature and the size of the buffer are made as a kernel config option. Besides consuming kernel memory, this feature will slow down the console by approximately 20%. Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Cc: Jindrich Makovicka <makovick@kmlinux.fjfi.cvut.cz> Cc: Martin Mares <mj@ucw.cz> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] vgacon: fix EGA cursor resize functionSamuel Thibault2006-03-27
| | | | | | | | | | | | This corrects cursor resize on ega boards: registers are write-only, so we shouldn't even try to read them. And on ega, 31/30 produces a flat cursor. Using 31/31 is better: except with 32 pixels high fonts, it shouldn't show up. Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org> Cc: "Antonino A. Daplas" <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] pnp: PNP: adjust pnp_register_driver signatureBjorn Helgaas2006-03-27
| | | | | | | | | | | | | | | Remove the assumption that pnp_register_driver() returns the number of devices claimed. Returning the count is unreliable because devices may be hot-plugged in the future. This changes the convention to "zero for success, or a negative error value," which matches pci_register_driver(), acpi_bus_register_driver(), and platform_driver_register(). Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Cc: Adam Belay <ambx1@neo.rr.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] pnp: IRDA: adjust pnp_register_driver signatureBjorn Helgaas2006-03-27
| | | | | | | | | | Remove the assumption that pnp_register_driver() returns the number of devices claimed. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Cc: Adam Belay <ambx1@neo.rr.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] pnp: parport: adjust pnp_register_driver signatureBjorn Helgaas2006-03-27
| | | | | | | | | | | | | | Remove the assumption that pnp_register_driver() returns the number of devices claimed. parport_pc_init() does nothing with "count", so remove it. Then nobody uses the return value of parport_pc_find_ports(), so make it void. Finally, update pnp_register_driver() usage. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Cc: Adam Belay <ambx1@neo.rr.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] RTC subsystem: M48T86 driverAlessandro Zummo2006-03-27
| | | | | | | | | | | | Add a driver for the ST M48T86 / Dallas DS12887 RTC. This is a platform driver. The platform device must provide I/O routines to access the RTC. Signed-off-by: Alessandro Zummo <a.zummo@towertech.it> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] RTC subsystem: SA1100/PXA2XX driverRichard Purdie2006-03-27
| | | | | | | | | Add an RTC subsystem driver for the ARM SA1100/PXA2XX processor RTC. Signed-off-by: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] RTC subsystem: EP93XX driverAlessandro Zummo2006-03-27
| | | | | | | | | This patch adds a driver for the RTC embedded in the Cirrus Logic EP93XX family of processors. Signed-off-by: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] RTC subsystem: RS5C372 driverAlessandro Zummo2006-03-27
| | | | | | | | | RTC class aware driver for the Ricoh RS5C372 chip used, among others, on the Synology DS101. Signed-off-by: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] RTC subsystem: PCF8563 driverAlessandro Zummo2006-03-27
| | | | | | | | | | An RTC class aware driver for the Philips PCF8563 RTC and Epson RTC8564 chips. This chip is used on the Iomega NAS100D. Signed-off-by: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] RTC subsystem: DS1672 driverAlessandro Zummo2006-03-27
| | | | | | | | | Driver for the Dallas/Maxim DS1672 chip, found on the Loft (http://www.giantshoulderinc.com). Signed-off-by: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] RTC subsystem: test device/driverAlessandro Zummo2006-03-27
| | | | | | | | | | Interrupts can be generated by echo "alarm|tick|update" >/sys/class/rtc/rtcX/device/irq Signed-off-by: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] RTC subsystem: X1205 driverAlessandro Zummo2006-03-27
| | | | | | | | | | | | | | A port of the existing x1205 driver under the new RTC subsystem. It is actually under test within the NSLU2 project (http://www.nslu2-linux.org) and it is working quite well. It is the first driver under this new subsystem and should be used as a guide to port other drivers. Signed-off-by: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] RTC subsystem: dev interfaceAlessandro Zummo2006-03-27
| | | | | | | | | | | | | | Add the dev interface to the RTC subsystem. Each RTC will be available under /dev/rtcX . A symlink from /dev/rtc0 to /dev/rtc cab be obtained with the following udev rule: KERNEL=="rtc0", SYMLINK+="rtc" Signed-off-by: Alessandro Zummo <a.zummo@towertech.it> Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] RTC subsystem: proc interfaceAlessandro Zummo2006-03-27
| | | | | | | | | | | | | | Add the proc interface to the RTC subsystem. The first RTC driver which registers with the class will be accessible by /proc/driver/rtc . This is required for compatibility with the standard RTC driver and to avoid breaking any user space application which may erroneusly rely on this. Signed-off-by: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] RTC subsystem: sysfs interfaceAlessandro Zummo2006-03-27
| | | | | | | | | | | | | | This patch adds the sysfs interface to the RTC subsystem. Each RTC client will have his own entry under /sys/classs/rtc/rtcN . Within this entry some attributes are exported by the subsystem, like date and time. Signed-off-by: Alessandro Zummo <a.zummo@towertech.it> Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] RTC subsystem: I2C cleanupAlessandro Zummo2006-03-27
| | | | | | | | | | | | | This patch, completely optional, removes from drivers/i2c/chips all the drivers that are implemented in the new RTC subsystem. It should be noted that none of the current driver is actually integrated, i.e. usable without further patches. Signed-off-by: Alessandro Zummo <a.zummo@towertech.it> Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] RTC subsystem: classAlessandro Zummo2006-03-27
| | | | | | | | | | | | | | Add the basic RTC subsystem infrastructure to the kernel. rtc/class.c - registration facilities for RTC drivers rtc/interface.c - kernel/rtc interface functions rtc/hctosys.c - snippet of code that copies hw clock to sw clock at bootup, if configured to do so. Signed-off-by: Alessandro Zummo <a.zummo@towertech.it> Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] RTC subsystem: ARM cleanupAlessandro Zummo2006-03-27
| | | | | | | | | | This patch removes from the ARM subsytem some of the rtc-related functions that have been included in the RTC subsystem. It also fixes some naming collisions. Signed-off-by: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] RTC Subsystem: library functionsAlessandro Zummo2006-03-27
| | | | | | | | RTC and date/time related functions. Signed-off-by: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Notifier chain update: API changesAlan Stern2006-03-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The kernel's implementation of notifier chains is unsafe. There is no protection against entries being added to or removed from a chain while the chain is in use. The issues were discussed in this thread: http://marc.theaimsgroup.com/?l=linux-kernel&m=113018709002036&w=2 We noticed that notifier chains in the kernel fall into two basic usage classes: "Blocking" chains are always called from a process context and the callout routines are allowed to sleep; "Atomic" chains can be called from an atomic context and the callout routines are not allowed to sleep. We decided to codify this distinction and make it part of the API. Therefore this set of patches introduces three new, parallel APIs: one for blocking notifiers, one for atomic notifiers, and one for "raw" notifiers (which is really just the old API under a new name). New kinds of data structures are used for the heads of the chains, and new routines are defined for registration, unregistration, and calling a chain. The three APIs are explained in include/linux/notifier.h and their implementation is in kernel/sys.c. With atomic and blocking chains, the implementation guarantees that the chain links will not be corrupted and that chain callers will not get messed up by entries being added or removed. For raw chains the implementation provides no guarantees at all; users of this API must provide their own protections. (The idea was that situations may come up where the assumptions of the atomic and blocking APIs are not appropriate, so it should be possible for users to handle these things in their own way.) There are some limitations, which should not be too hard to live with. For atomic/blocking chains, registration and unregistration must always be done in a process context since the chain is protected by a mutex/rwsem. Also, a callout routine for a non-raw chain must not try to register or unregister entries on its own chain. (This did happen in a couple of places and the code had to be changed to avoid it.) Since atomic chains may be called from within an NMI handler, they cannot use spinlocks for synchronization. Instead we use RCU. The overhead falls almost entirely in the unregister routine, which is okay since unregistration is much less frequent that calling a chain. Here is the list of chains that we adjusted and their classifications. None of them use the raw API, so for the moment it is only a placeholder. ATOMIC CHAINS ------------- arch/i386/kernel/traps.c: i386die_chain arch/ia64/kernel/traps.c: ia64die_chain arch/powerpc/kernel/traps.c: powerpc_die_chain arch/sparc64/kernel/traps.c: sparc64die_chain arch/x86_64/kernel/traps.c: die_chain drivers/char/ipmi/ipmi_si_intf.c: xaction_notifier_list kernel/panic.c: panic_notifier_list kernel/profile.c: task_free_notifier net/bluetooth/hci_core.c: hci_notifier net/ipv4/netfilter/ip_conntrack_core.c: ip_conntrack_chain net/ipv4/netfilter/ip_conntrack_core.c: ip_conntrack_expect_chain net/ipv6/addrconf.c: inet6addr_chain net/netfilter/nf_conntrack_core.c: nf_conntrack_chain net/netfilter/nf_conntrack_core.c: nf_conntrack_expect_chain net/netlink/af_netlink.c: netlink_chain BLOCKING CHAINS --------------- arch/powerpc/platforms/pseries/reconfig.c: pSeries_reconfig_chain arch/s390/kernel/process.c: idle_chain arch/x86_64/kernel/process.c idle_notifier drivers/base/memory.c: memory_chain drivers/cpufreq/cpufreq.c cpufreq_policy_notifier_list drivers/cpufreq/cpufreq.c cpufreq_transition_notifier_list drivers/macintosh/adb.c: adb_client_list drivers/macintosh/via-pmu.c sleep_notifier_list drivers/macintosh/via-pmu68k.c sleep_notifier_list drivers/macintosh/windfarm_core.c wf_client_list drivers/usb/core/notify.c usb_notifier_list drivers/video/fbmem.c fb_notifier_list kernel/cpu.c cpu_chain kernel/module.c module_notify_list kernel/profile.c munmap_notifier kernel/profile.c task_exit_notifier kernel/sys.c reboot_notifier_list net/core/dev.c netdev_chain net/decnet/dn_dev.c: dnaddr_chain net/ipv4/devinet.c: inetaddr_chain It's possible that some of these classifications are wrong. If they are, please let us know or submit a patch to fix them. Note that any chain that gets called very frequently should be atomic, because the rwsem read-locking used for blocking chains is very likely to incur cache misses on SMP systems. (However, if the chain's callout routines may sleep then the chain cannot be atomic.) The patch set was written by Alan Stern and Chandra Seetharaman, incorporating material written by Keith Owens and suggestions from Paul McKenney and Andrew Morton. [jes@sgi.com: restructure the notifier chain initialization macros] Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Chandra Seetharaman <sekharan@us.ibm.com> Signed-off-by: Jes Sorensen <jes@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivialLinus Torvalds2006-03-26
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial: drivers/char/ftape/lowlevel/fdc-io.c: Correct a comment Kconfig help: MTD_JEDECPROBE already supports Intel Remove ugly debugging stuff do_mounts.c: Minor ROOT_DEV comment cleanup BUG_ON() Conversion in drivers/s390/block/dasd_devmap.c BUG_ON() Conversion in mm/mempool.c BUG_ON() Conversion in mm/memory.c BUG_ON() Conversion in kernel/fork.c BUG_ON() Conversion in ipc/sem.c BUG_ON() Conversion in fs/ext2/ BUG_ON() Conversion in fs/hfs/ BUG_ON() Conversion in fs/dcache.c BUG_ON() Conversion in fs/buffer.c BUG_ON() Conversion in input/serio/hp_sdc_mlc.c BUG_ON() Conversion in md/dm-table.c BUG_ON() Conversion in md/dm-path-selector.c BUG_ON() Conversion in drivers/isdn BUG_ON() Conversion in drivers/char BUG_ON() Conversion in drivers/mtd/
| * drivers/char/ftape/lowlevel/fdc-io.c: Correct a commentBastien Roucaries2006-03-26
| | | | | | | | | | | | | | This patch correct a comment about cli(). Signed-off-by: Bastien Roucaries <roucaries.bastien@gmail.com> Signed-off-by: Adrian Bunk <bunk@stusta.de>
| * Kconfig help: MTD_JEDECPROBE already supports IntelAdrian Bunk2006-03-26
| | | | | | | | | | | | | | Intel chips are already supported. Signed-off-by: Adrian Bunk <bunk@stusta.de> Acked-by: David Woodhouse <dwmw2@infradead.org>
| * BUG_ON() Conversion in drivers/s390/block/dasd_devmap.cEric Sesterhenn2006-03-26
| | | | | | | | | | | | | | | | this changes if() BUG(); constructs to BUG_ON() which is cleaner, contains unlikely() and can better optimized away. Signed-off-by: Eric Sesterhenn <snakebyte@gmx.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
| * BUG_ON() Conversion in input/serio/hp_sdc_mlc.cEric Sesterhenn2006-03-26
| | | | | | | | | | | | | | | | this changes if() BUG(); constructs to BUG_ON() which is cleaner and can better optimized away Signed-off-by: Eric Sesterhenn <snakebyte@gmx.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
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