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* [PATCH] vesafb: Disable mtrr as the defaultAntonino A. Daplas2005-11-072-3/+3
| | | | | | | | | | | vesafb occassionally gets the size wrong when setting the mtrr. When X or DRI attempts to set the mtrr, it will fail due to range overlap significantly affecting their performance. Disable mtrr and let the user explicitly enable it with the mtrr:n option. 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] s3c2410fb: initialise device_driver .ownerBen Dooks2005-11-071-0/+1
| | | | | | | | | | Initialise the .owner field, so that if the driver is built as a module, the system has a link to the owner Signed-off-by: Ben Dooks <ben-linux@fluff.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] fbdev: fix the fb_find_nearest_mode() functionMichal Januszewski2005-11-073-13/+16
| | | | | | | | | | | | | | | | | | Currently the fb_find_nearest_mode() function finds a mode with screen resolution closest to that described by the 'var' argument and with some arbitrary refresh rate (eg. in the following sequence of refresh rates: 70 60 53 85 75, 53 is selected). This patch fixes the function so that it looks for the closest mode as far as both resolution and refresh rate are concerned. The function's first argument is changed to fb_videomode so that the refresh rate can be specified by the caller, as fb_var_screeninfo doesn't have any fields that could directly hold this data. Signed-off-by: Michal Januszewski <spock@gentoo.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] nvidiafb: Fix empty macroAntonino A. Daplas2005-11-071-1/+1
| | | | | | | | Use do {} while(0) for empty reverse_order() macro. 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] fbdev: Workaround for buggy EDID blocksAntonino A. Daplas2005-11-071-1/+17
| | | | | | | | | | Some EDID blocks set the flag "prefer first detailed timing" without providing any detailed timing at all. Clear this flag if the block does not provide detailed timings. 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] pm2fb: Manual configuration of timings for Elsa Winner 2000 OfficePeter 'p2' De Schrijver2005-11-071-0/+16
| | | | | | | | | | | Attached is a small patch which configures the correct memory clock and timings on the Elsa Winner 2000 Office pm2 based card. This is necessary when the card is used on a platform which does not support PC style BIOS initialization. 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: Convert from VGA IO access to MMIO accessAntonino A. Daplas2005-11-072-487/+537
| | | | | | | | Use MMIO registers instead of banging the VGA IO registers. 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: Get initial mode timings from LCD BIOSAntonino A. Daplas2005-11-071-14/+44
| | | | | | | | | | | | | | | | | | | | | | Reported by: Jean-Philippe Guérard (Bugzilla Bug 1782) "I've tried with video=atyfb:debug and video=atyfb:debug,mode:1280x600, \ nomtrr. In both case, the screen stays black, but seems divided into 4 vertical bands. Some white lines pop up randomly on each vertical band." The problem is a combination of an incorrect xclk plus lack of timing information. The adapter is attached to an LCD device that can do 1280x600 (which is not a standard resolution). The global mode database does not have an entry for it. Fortunately, the Video BIOS contains the complete timing info for this display, however, atyfb is not making use of it. Add support to get the timing information from the BIOS, if available. 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] vesafb: Fix color palette handlingAntonino A. Daplas2005-11-071-31/+25
| | | | | | | | | Fix out-of-bounds bug. The pseudopalette has room only for 16 entries, thus, write only the first 16 entries to the pseudopalette. 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] fbdev: Remove software clipping from drawing functionsAntonino A. Daplas2005-11-073-79/+3
| | | | | | | | | | | Remove software clipping from imageblit, fillrect and copyarea. Clipping is not needed because the console layer assures that reads/writes doest not happen beyond the extents of the framebuffer. And software clipping tends to hide bugs, if they do exist. 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] fbcon: Initialize new driver when old driver is releasedAntonino A. Daplas2005-11-071-0/+9
| | | | | | | | | | | | If machine has more than 1 driver installed, and they all drive the same hardware, it's possible that the driver's fb_release() method will attempt to restore the hardware state to the initial state. This will leave the new driver in an undefined state. To prevent this problem, initialize the new driver by calling fb_set_par() when the old driver is released by fbcon. 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] fbcon: Use helper function when filling out var structureAntonino A. Daplas2005-11-071-15/+2
| | | | | | | | | Instead of manually filling up the fields in struct fb_var_screeninfo, use the display_to_var() helper. 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] fbcon: Consolidate redundant codeAntonino A. Daplas2005-11-071-62/+23
| | | | | | | | | Lot's of redundant code scattered throughout fbcon.c. Consolidate them all into one function, fbcon_update_softback(). 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] fbcon/fbdev: Move softcursor out of fbdev to fbconAntonino A. Daplas2005-11-0775-162/+20
| | | | | | | | | | | | | | | | | | | | According to Jon Smirl, filling in the field fb_cursor with soft_cursor for drivers that do not support hardware cursors is redundant. The soft_cursor function is usable by all drivers because it is just a wrapper around fb_imageblit. And because soft_cursor is an fbcon-specific hook, the file is moved to the console directory. Thus, drivers that do not support hardware cursors can leave the fb_cursor field blank. For drivers that do, they can fill up this field with their own version. The end result is a smaller code size. And if the framebuffer console is not loaded, module/kernel size is also reduced because the soft_cursor module will also not be loaded. 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] radeonfb: prevent spurious recompilationsJean Delvare2005-11-072-2/+2
| | | | | | | | | | | Prevent spurious recompilations of the radeonfb driver when I2C/DDC support is not included and i2c header files are modified. Signed-off-by: Jean Delvare <khali@linux-fr.org> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.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] intelfb: extend partial support of i915G to include i915GMScott MacKenzie2005-11-073-5/+14
| | | | | | | | | Add partial support for GMA900 within the i915GM chipset. Signed-off-by: Scott MacKenzie <irrational@poboxes.com> Cc: "Antonino A. Daplas" <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] nvidiafb: Add flat panel dither supportBenjamin Herrenschmidt2005-11-071-4/+20
| | | | | | | | | | | | | | | | nvidiafb didn't fully hook-up the code it borrowed from X for doing flat panel dithering (this is useful for 6 bits panels). This adds a driver option to force it, and by default "reads" the current value from the chip to get the firmware setting. It significantly improves the quality of images on the iMac G5 I have here (though the X driver doesn't yet "read" the current value and defaults to 0, so you have to add Option "FBDither" "true" to your X config file to get that, I'll try to fix X.org to "read" the default unless specified asap). Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: "Antonino A. Daplas" <adaplas@hotpop.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] nvidiafb-fix-mode-setting-ppc-support-warning-fixesAndrew Morton2005-11-071-1/+5
| | | | | | | | | | | | drivers/video/nvidia/nv_setup.c: In function `NVCommonSetup': drivers/video/nvidia/nv_setup.c:408: warning: statement with no effect drivers/video/nvidia/nv_setup.c:496: warning: statement with no effect drivers/video/nvidia/nv_setup.c:504: warning: statement with no effect Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: "Antonino A. Daplas" <adaplas@hotpop.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] nvidiafb: Fix mode setting & PPC supportBenjamin Herrenschmidt2005-11-075-43/+137
| | | | | | | | | | | | | | This patch fixes nvifiafb mode setting code to be closer to what the X driver does, which actually makes it work on the 5200FX I have access to. It also fix the routine that gets the EDID from Open Firmware on PPC, it was broken in various ways and would crash at boot. Compared to the patch I posted to linux-fbdev last week, this one just changes a printk to be closer to the other ones in the driver. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: "Antonino A. Daplas" <adaplas@hotpop.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] fb: straighten up fb drivers menuRandy Dunlap2005-11-071-59/+59
| | | | | | | | | | | | | Arrange frame buffer menu: - puts all Epson drivers together - removes split of FB_PXA and FB_PXA_PARAMETERS by FB_W100 - results in PXA, W100, Epson, S3C2410, & Virtual FB drivers being presented at the same menu level as all other FB drivers Signed-off-by: Randy Dunlap <rdunlap@xenotime.net> 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] framebuffer: add some help text in KconfigRandy.Dunlap2005-11-073-7/+14
| | | | | | | | | | | | | Frame buffer driver help text changes: - Move S3 Trio next to S3 Savage; - add or clarify help text for several FB drivers; - add help text for FB console; - add help text for bootup logos; Acked-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] knfsd: make sure svc_process call the correct pg_authenticate for ↵NeilBrown2005-11-072-5/+8
| | | | | | | | | | | | | | | | | multi-service port If an RPC socket is serving multiple programs, then the pg_authenticate of the first program in the list is called, instead of pg_authenticate for the program to be run. This does not cause a problem with any programs in the current kernel, but could confuse future code. Also set pg_authenticate for nfsd_acl_program incase it ever gets used. Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] knfsd: Fix some minor sign problems in nfsd/xdrNeilBrown2005-11-073-3/+5
| | | | | | | | | | | | | There are a couple of tests which could possibly be confused by extremely large numbers appearing in 'xdr' packets. I think the closest to an exploit you could get would be writing random data from a free page into a file - i.e. leak data out of kernel space. I'm fairly sure they cannot be used for remote compromise. Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] knfsd: Allow run-time selection of NFS versions to exportNeilBrown2005-11-074-29/+151
| | | | | | | | | | | Provide a file in the NFSD filesystem that allows setting and querying of which version of NFS are being exported. Changes are only allowed while no server is running. Signed-off-by: Steve Dickson <steved@redhat.com> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] knfsd: Restore functionality to read from file in /proc/fs/nfsd/NeilBrown2005-11-071-1/+15
| | | | | | | | | | | | | | | | Most files in the nfsd filesystems are transaction files. You write a request, and read a response. For some (e.g. 'threads') it makes sense to just be able to read and get the current value. This functionality did exist but was broken recently when someone modified nfsctl.c without going through the maintainer. This patch fixes the regression. Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] knfsd: fix setattr-on-symlink error returnNeilBrown2005-11-071-1/+8
| | | | | | | | | | | | | | | | | This is a somewhat cosmetic fix to keep the SpecFS validation test from complaining. SpecFS want's to try chmod on symlinks, and ext3 and reiser (at least) return ENOTSUPP. Probably both sides are being silly, but it is easiest to simply make it a non-issue and filter out chmod requests on symlinks at the nfsd level. Signed-off-by: Olaf Kirch <okir@suse.de> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] prevent dmesg warning in zr36067 driverRonald S. Bultje2005-11-071-2/+2
| | | | | | | | | | | | | | Fix the warning "Debug: sleeping function called from invalid context at include/asm/semaphore.h:102" that the zr36067 driver emits every time an application using JPEG capture starts up (e.g. mjpegtools' lavrec). The warning is harmless, but clogs up the dmesg output. This was logged as bugzilla #5403. (Thanks to Christian Casteyde for helping me in fixing this long-standing annoyance.) Signed-off-by: Ronald S. Bultje <rbultje@ronald.bitfreak.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] i4l: update hfc_usb driverMartin Bachem2005-11-072-177/+121
| | | | | | | | | - cleanup source - remove nonfunctional code parts Signed-off-by: Karsten Keil <kkeil@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] rapidio: message interface updatesMatt Porter2005-11-075-26/+41
| | | | | | | | | Updates the RIO messaging interface to pass a device instance into the event registeration and callbacks. Signed-off-by: Matt Porter <mporter@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] RapidIO support: ppc32Matt Porter2005-11-0710-34/+1109
| | | | | | | | | Adds PPC32 RIO support. Init code for the MPC85xx RIO ports and glue for the STx GP3 board to use it. Signed-off-by: Matt Porter <mporter@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] rapidio: core updatesMatt Porter2005-11-074-25/+28
| | | | | | | | | Addresses issues raised with the 2.6.12-rc6-mm1 RIO support. Fix dma_mask init, shrink some code, general cleanup. Signed-off-by: Matt Porter <mporter@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] RapidIO support: core enumMatt Porter2005-11-073-0/+1025
| | | | | | | | | | | Adds RapidIO enumeration/discovery. The core code implements enumeration/discovery, management of devices/resources, and interfaces for RIO drivers. Signed-off-by: Matt Porter <mporter@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] RapidIO support: core includesMatt Porter2005-11-074-0/+1016
| | | | | | | | | | | Add RapidIO core include files. The core code implements enumeration/discovery, management of devices/resources, and interfaces for RIO drivers. Signed-off-by: Matt Porter <mporter@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] RapidIO support: core baseMatt Porter2005-11-0712-1/+1393
| | | | | | | | | | | | | | | | | Adds a RapidIO subsystem to the kernel. RIO is a switched fabric interconnect used in higher-end embedded applications. The curious can look at the specs over at http://www.rapidio.org The core code implements enumeration/discovery, management of devices/resources, and interfaces for RIO drivers. There's a lot more to do to take advantages of all the hardware features. However, this should provide a good base for folks with RIO hardware to start contributing. Signed-off-by: Matt Porter <mporter@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Kprobes: preempt_disable/enable() simplificationAnanth N Mavinakayanahalli2005-11-077-61/+80
| | | | | | | | | | | Reorganize the preempt_disable/enable calls to eliminate the extra preempt depth. Changes based on Paul McKenney's review suggestions for the kprobes RCU changeset. Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Kprobes: Use RCU for (un)register synchronization - arch changesAnanth N Mavinakayanahalli2005-11-075-74/+27
| | | | | | | | | | | | Changes to the arch kprobes infrastructure to take advantage of the locking changes introduced by usage of RCU for synchronization. All handlers are now run without any locks held, so they have to be re-entrant or provide their own synchronization. Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Kprobes: Use RCU for (un)register synchronization - base changesAnanth N Mavinakayanahalli2005-11-072-66/+46
| | | | | | | | | | | | | | Changes to the base kprobes infrastructure to use RCU for synchronization during kprobe registration and unregistration. These changes coupled with the arch kprobe changes (next in series): a. serialize registration and unregistration of kprobes. b. enable lockless execution of handlers. Handlers can now run in parallel. Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Kprobes: Track kprobe on a per_cpu basis - x86_64 changesAnanth N Mavinakayanahalli2005-11-072-59/+89
| | | | | | | | | | | x86_64 changes to track kprobe execution on a per-cpu basis. We now track the kprobe state machine independently on each cpu using a arch specific kprobe control block. Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Kprobes: Track kprobe on a per_cpu basis - sparc64 changesAnanth N Mavinakayanahalli2005-11-072-64/+87
| | | | | | | | | | | | Sparc64 changes to track kprobe execution on a per-cpu basis. We now track the kprobe state machine independently on each cpu using an arch specific kprobe control block. Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Kprobes: Track kprobe on a per_cpu basis - ppc64 changesAnanth N Mavinakayanahalli2005-11-072-40/+69
| | | | | | | | | | | PPC64 changes to track kprobe execution on a per-cpu basis. We now track the kprobe state machine independently on each cpu using an arch specific kprobe control block. Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Kprobes: Track kprobe on a per_cpu basis - ia64 changesAnanth N Mavinakayanahalli2005-11-072-38/+58
| | | | | | | | | | | IA64 changes to track kprobe execution on a per-cpu basis. We now track the kprobe state machine independently on each cpu using an arch specific kprobe control block. Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Kprobes: Track kprobe on a per_cpu basis - i386 changesAnanth N Mavinakayanahalli2005-11-072-57/+86
| | | | | | | | | | | I386 changes to track kprobe execution on a per-cpu basis. We now track the kprobe state machine independently on each cpu, using an arch specific kprobe control block. Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Kprobes: Track kprobe on a per_cpu basis - base changesAnanth N Mavinakayanahalli2005-11-072-24/+50
| | | | | | | | | | Changes to the base kprobe infrastructure to track kprobe execution on a per-cpu basis. Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Kprobes: rearrange preempt_disable/enable() callsAnanth N Mavinakayanahalli2005-11-075-56/+65
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The following set of patches are aimed at improving kprobes scalability. We currently serialize kprobe registration, unregistration and handler execution using a single spinlock - kprobe_lock. With these changes, kprobe handlers can run without any locks held. It also allows for simultaneous kprobe handler executions on different processors as we now track kprobe execution on a per processor basis. It is now necessary that the handlers be re-entrant since handlers can run concurrently on multiple processors. All changes have been tested on i386, ia64, ppc64 and x86_64, while sparc64 has been compile tested only. The patches can be viewed as 3 logical chunks: patch 1: Reorder preempt_(dis/en)able calls patches 2-7: Introduce per_cpu data areas to track kprobe execution patches 8-9: Use RCU to synchronize kprobe (un)registration and handler execution. Thanks to Maneesh Soni, James Keniston and Anil Keshavamurthy for their review and suggestions. Thanks again to Anil, Hien Nguyen and Kevin Stafford for testing the patches. This patch: Reorder preempt_disable/enable() calls in arch kprobes files in preparation to introduce locking changes. No functional changes introduced by this patch. Signed-off-by: Ananth N Mavinakayahanalli <ananth@in.ibm.com> Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] ipmi: fix watchdog timeout panic handlingCorey Minyard2005-11-071-4/+9
| | | | | | | | | | | If a panic came from the IPMI watchdog pretimeout and that was reported via an NMI, it would also be reported via the standard IPMI flags, which would get picked up when reporting panic events and cause another panic. This adds an atomic to avoid calling panic twice. Signed-off-by: Corey Minyard <cminyard@mvista.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] ipmi: use rcu lock for using command receiversCorey Minyard2005-11-071-16/+15
| | | | | | | | | | | | Use rcu_read_lock for the cmd_rcvrs list, since that was what what intended, anyway. This means that all the users of the cmd_rcvrs_lock are tasks, so the irq disables are no longer required for that lock and it can become a semaphore. Signed-off-by: Corey Minyard <minyard@acm.org> Acked-by: "Paul E. McKenney" <paulmck@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] ipmi: use kthread APIMatt Domsch2005-11-071-30/+15
| | | | | | | | | | Convert ipmi driver thread to kthread API, only sleep when interface is idle. Signed-off-by: Matt Domsch <Matt_Domsch@dell.com> Cc: Corey Minyard <minyard@acm.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] ipmi: add timer threadCorey Minyard2005-11-071-21/+63
| | | | | | | | | | | | | | | | | | | | | | | | | We must poll for responses to commands when interrupts aren't in use. The default poll interval is based on using a kernel timer, which varies with HZ. For character-based interfaces like KCS and SMIC though, that can be way too slow (>15 minutes to flash a new firmware with KCS, >20 seconds to retrieve the sensor list). This creates a low-priority kernel thread to poll more often. If the state machine is idle, so is the kernel thread. But if there's an active command, it polls quite rapidly. This decrease a firmware flash time from 15 minutes to 1.5 minutes, and the sensor list time to 4.5 seconds, on a Dell PowerEdge x8x system. The timer-based polling remains, to ensure some amount of responsiveness even under high user process CPU load. Checking for a stopped timer at rmmod now uses atomics and del_timer_sync() to ensure safe stoppage. Signed-off-by: Matt Domsch <Matt_Domsch@dell.com> Signed-off-by: Corey Minyard <minyard@acm.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] ipmi: kcs error0 delayCorey Minyard2005-11-073-1/+11
| | | | | | | | | | | | | | | | | | | | | BMCs can get into ERROR0 state while flashing new firmware, particularly while the BMC is erasing the next flash block, which may take a just under 2 seconds on a Dell PowerEdge 2800 (1.75 seconds typical), during which time the single-threaded firmware may not be able to process new commands. In particular, clearing OBF may not take effect immediately. We want it to delay in ERROR0 after clearing OBF a bit waiting for OBF to actually be clear before proceeding. This introduces a new return value from the LLDD's event loop, SI_SM_CALL_WITH_TICK_DELAY. This means the calling thread/timer should schedule_timeout() at least 1 tick, rather than busy-wait. This is a longer delay than SI_SM_CALL_WITH_DELAY, which is typically a 250us busy-wait. Signed-off-by: Matt Domsch <Matt_Domsch@dell.com> Signed-off-by: Corey Minyard <minyard@acm.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] ipmi: bt restart reset fixesCorey Minyard2005-11-071-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | The current BT retry/reset mechanism fails to succeed on a PowerEdge 1650, when the controller is wedged with B2H_ATN asserted at XACTION_START. If this occurs, no further commands will ever succeed unless the state of the controller is first cleared out. Furthermore, the soft reset would only occur if the first command after insmod was the one that timed out, not if a later command timed out. This patch changes the retry/reset mechanism to be as follows: Before retrying a command, clear the state of the BT controller such that the flags represent ready for a new transaction. This increases the chance of success of the restarted transaction. After 2 retries, issue a soft reset and retry one more time before giving up and reporting back a failure. Signed-off-by: Matt Domsch <Matt_Domsch@dell.com> Acked-by: Rocky Craig <rocky.craig@hp.com> Signed-off-by: Corey Minyard <minyard@acm.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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