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2006-01-10[PATCH] TTY layer buffering revampAlan Cox4-25/+31
The API and code have been through various bits of initial review by serial driver people but they definitely need to live somewhere for a while so the unconverted drivers can get knocked into shape, existing drivers that have been updated can be better tuned and bugs whacked out. This replaces the tty flip buffers with kmalloc objects in rings. In the normal situation for an IRQ driven serial port at typical speeds the behaviour is pretty much the same, two buffers end up allocated and the kernel cycles between them as before. When there are delays or at high speed we now behave far better as the buffer pool can grow a bit rather than lose characters. This also means that we can operate at higher speeds reliably. For drivers that receive characters in blocks (DMA based, USB and especially virtualisation) the layer allows a lot of driver specific code that works around the tty layer with private secondary queues to be removed. The IBM folks need this sort of layer, the smart serial port people do, the virtualisers do (because a virtualised tty typically operates at infinite speed rather than emulating 9600 baud). Finally many drivers had invalid and unsafe attempts to avoid buffer overflows by directly invoking tty methods extracted out of the innards of work queue structs. These are no longer needed and all go away. That fixes various random hangs with serial ports on overflow. The other change in here is to optimise the receive_room path that is used by some callers. It turns out that only one ldisc uses receive room except asa constant and it updates it far far less than the value is read. We thus make it a variable not a function call. I expect the code to contain bugs due to the size alone but I'll be watching and squashing them and feeding out new patches as it goes. Because the buffers now dynamically expand you should only run out of buffering when the kernel runs out of memory for real. That means a lot of the horrible hacks high performance drivers used to do just aren't needed any more. Description: tty_insert_flip_char is an old API and continues to work as before, as does tty_flip_buffer_push() [this is why many drivers dont need modification]. It does now also return the number of chars inserted There are also tty_buffer_request_room(tty, len) which asks for a buffer block of the length requested and returns the space found. This improves efficiency with hardware that knows how much to transfer. and tty_insert_flip_string_flags(tty, str, flags, len) to insert a string of characters and flags For a smart interface the usual code is len = tty_request_buffer_room(tty, amount_hardware_says); tty_insert_flip_string(tty, buffer_from_card, len); More description! At the moment tty buffers are attached directly to the tty. This is causing a lot of the problems related to tty layer locking, also problems at high speed and also with bursty data (such as occurs in virtualised environments) I'm working on ripping out the flip buffers and replacing them with a pool of dynamically allocated buffers. This allows both for old style "byte I/O" devices and also helps virtualisation and smart devices where large blocks of data suddenely materialise and need storing. So far so good. Lots of drivers reference tty->flip.*. Several of them also call directly and unsafely into function pointers it provides. This will all break. Most drivers can use tty_insert_flip_char which can be kept as an API but others need more. At the moment I've added the following interfaces, if people think more will be needed now is a good time to say int tty_buffer_request_room(tty, size) Try and ensure at least size bytes are available, returns actual room (may be zero). At the moment it just uses the flipbuf space but that will change. Repeated calls without characters being added are not cumulative. (ie if you call it with 1, 1, 1, and then 4 you'll have four characters of space. The other functions will also try and grow buffers in future but this will be a more efficient way when you know block sizes. int tty_insert_flip_char(tty, ch, flag) As before insert a character if there is room. Now returns 1 for success, 0 for failure. int tty_insert_flip_string(tty, str, len) Insert a block of non error characters. Returns the number inserted. int tty_prepare_flip_string(tty, strptr, len) Adjust the buffer to allow len characters to be added. Returns a buffer pointer in strptr and the length available. This allows for hardware that needs to use functions like insl or mencpy_fromio. Signed-off-by: Alan Cox <alan@redhat.com> Cc: Paul Fulghum <paulkf@microgate.com> Signed-off-by: Hirokazu Takata <takata@linux-m32r.org> Signed-off-by: Serge Hallyn <serue@us.ibm.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: John Hawkes <hawkes@sgi.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10[PATCH] lib/zlib*: cleanupsAdrian Bunk1-0/+11
This patch contains the following possible cleanups: - #if 0 the following unused functions: - zlib_deflate/deflate.c: zlib_deflateSetDictionary - zlib_deflate/deflate.c: zlib_deflateParams - zlib_deflate/deflate.c: zlib_deflateCopy - zlib_inflate/infblock.c: zlib_inflate_set_dictionary - zlib_inflate/infblock.c: zlib_inflate_blocks_sync_point - zlib_inflate/inflate_sync.c: zlib_inflateSync - zlib_inflate/inflate_sync.c: zlib_inflateSyncPoint - remove the following unneeded EXPORT_SYMBOL's: - zlib_deflate/deflate_syms.c: zlib_deflateCopy - zlib_deflate/deflate_syms.c: zlib_deflateParams - zlib_inflate/inflate_syms.c: zlib_inflateSync - zlib_inflate/inflate_syms.c: zlib_inflateSyncPoint Signed-off-by: Adrian Bunk <bunk@stusta.de> Cc: Matt Mackall <mpm@selenic.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10[PATCH] DocBook: fix kernel-doc commentsMartin Waitz2-4/+3
Fix typos in comments to remove kernel-doc warnings. Signed-off-by: Martin Waitz <tali@admingilde.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10[PATCH] include/video/newport.h: "extern inline" -> "static inline"Adrian Bunk1-2/+3
"extern inline" doesn't make much sense. Signed-off-by: Adrian Bunk <bunk@stusta.de> Cc: "Antonino A. Daplas" <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10[PATCH] nvidiafb: Add support for some pci-e chipsetsAntonino A. Daplas1-0/+5
Chipsets with PCI device ids & 0xf0 == 0x00f0 has their actual chipset type in offset 0x1800 of the mmio space. Add support for this. Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10[PATCH] fbdev: sstfb: Driver cleanupsAntonino A. Daplas1-0/+1
- remove unneeded casts - make setcolreg return success if regno > 15, but don't do anything - use framebuffer_alloc/framebuffer_release to allocate/free memory Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10[PATCH] fbdev: tdfxfb: Driver cleanupsAntonino A. Daplas1-43/+43
- remove unneeded casts - move memory for pseudo_palette inside struct tdfxfb_par - whitespace changes Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10[PATCH] fbdev: neofb: Driver cleanupsAntonino A. Daplas1-0/+1
- remove unneeded casts - move memory for pseudo_palette inside struct neofb_par Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10[PATCH] fbdev: kyrofb: Driver cleanupsAntonino A. Daplas1-0/+1
- remove unneeded casts - use framebuffer_alloc/framebuffer_release to allocate/free memory - the pseudo_palette is always u32 regardless of bpp if using generic drawing functions Signed-off-by: Antonino Daplas <adaplas@pol.net> Acked-by: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10[PATCH] vesafb: Drop blank hookAntonino A. Daplas1-2/+1
From: Bugzilla Bug 5351 "After resuming from S3 (suspended while in X), the LCD panel stays black . However, the laptop is up again, and I can SSH into it from another machine. I can get the panel working again, when I first direct video output to the CRT output of the laptop, and then back to LCD (done by repeatedly hitting Fn+F5 buttons on the Toshiba, which directs output to either LCD, CRT or TV) None of this ever happened with older kernels." This bug is due to the recently added vesafb_blank() method in vesafb. It works with CRT displays, but has a high incidence of problems in laptop users. Since CRT users don't really get that much benefit from hardware blanking, drop support for this. Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10[PATCH] kprobes: fix build breakageAnanth N Mavinakayanahalli6-5/+8
The following patch (against 2.6.15-rc5-mm3) fixes a kprobes build break due to changes introduced in the kprobe locking in 2.6.15-rc5-mm3. In addition, the patch reverts back the open-coding of kprobe_mutex. Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Acked-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>
2006-01-10[PATCH] kprobes: arch_remove_kprobeAnil S Keshavamurthy6-1/+5
Currently arch_remove_kprobes() is only implemented/required for x86_64 and powerpc. All other architecture like IA64, i386 and sparc64 implementes a dummy function which is being called from arch independent kprobes.c file. This patch removes the dummy functions and replaces it with #define arch_remove_kprobe(p, s) do { } while(0) 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>
2006-01-10[PATCH] kprobes: changed from using spinlock to mutexAnil S Keshavamurthy2-6/+0
Since Kprobes runtime exception handlers is now lock free as this code path is now using RCU to walk through the list, there is no need for the register/unregister{_kprobe} to use spin_{lock/unlock}_isr{save/restore}. The serialization during registration/unregistration is now possible using just a mutex. In the above process, this patch also fixes a minor memory leak for x86_64 and powerpc. 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>
2006-01-10[PATCH] kprobes: cleanup include/asm/kprobes.hAnil S Keshavamurthy4-34/+1
The arch specific kprobes.h files never gets included when CONFIG_KPROBES is turned off. Hence check for CONFIG_KPROBES is not appropriate here in this arch specific kprobes.h files. Also the below defined function kprobes_exception_notify() is not needed when CONFIG_KPROBES is off. Compile tested for both CONFIG_KPROBES=y and N. 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>
2006-01-10[PATCH] kprobes: enable funcions only for required archAnil S Keshavamurthy2-0/+4
Kernel/kprobes.c defines get_insn_slot() and free_insn_slot() which are currently required _only_ for x86_64 and powerpc (which has no-exec support). FYI, get{free}_insn_slot() functions manages the memory page which is mapped as executable, required for instruction emulation. This patch moves those two functions under __ARCH_WANT_KPROBES_INSN_SLOT and defines __ARCH_WANT_KPROBES_INSN_SLOT in arch specific kprobes.h file. 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>
2006-01-10[PATCH] Remove getnstimestamp()Matt Helsley1-1/+0
Remove getnstimestamp() in favor of ktime.h's ktime_get_ts() Signed-off-by: Matt Helsley <matthltc@us.ibm.com> Cc: john stultz <johnstul@us.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10[PATCH] hrtimer: convert posix timers completelyThomas Gleixner3-37/+10
- convert posix-timers.c to use hrtimers - remove the now obsolete abslist code Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Miklos Szeredi <miklos@szeredi.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10[PATCH] hrtimer: switch clock_nanosleep to hrtimer nanosleep APIThomas Gleixner1-3/+4
Switch clock_nanosleep to use the new nanosleep functions in hrtimer.c Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10[PATCH] hrtimer: create hrtimer nanosleep APIThomas Gleixner1-0/+6
introduce the hrtimer_nanosleep() and hrtimer_nanosleep_real() APIs. Not yet used by any code. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10[PATCH] hrtimer: switch itimers to hrtimerThomas Gleixner2-3/+4
switch itimers to a hrtimers-based implementation Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10[PATCH] hrtimer: hrtimer core codeThomas Gleixner2-0/+145
hrtimer subsystem core. It is initialized at bootup and expired by the timer interrupt, but is otherwise not utilized by any other subsystem yet. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10[PATCH] hrtimer: introduce ktime_t time formatThomas Gleixner1-0/+269
- introduce ktime_t: nanosecond-resolution time format. - eliminate the plain s64 scalar type, and always use the union. This simplifies the arithmetics. Idea from Roman Zippel. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10[PATCH] hrtimer: introduce nsec_t type and conversion functionsThomas Gleixner1-0/+47
- introduce the nsec_t type - basic nsec conversion routines: timespec_to_ns(), timeval_to_ns(), ns_to_timespec(), ns_to_timeval(). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10[PATCH] hrtimer: create and use timespec_valid macroThomas Gleixner1-0/+6
add timespec_valid(ts) [returns false if the timespec is denorm] Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10[PATCH] hrtimer: coding style and white space cleanup 2Thomas Gleixner1-36/+44
style/whitespace/macro cleanups of posix-timers.h Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10[PATCH] hrtimer: make clockid_t arguments constThomas Gleixner1-11/+11
add const arguments to the posix-timers.h API functions Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10[PATCH] hrtimer: coding style and white space cleanupIngo Molnar1-30/+31
style and whitespace cleanup of the rest of time.h. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10[PATCH] hrtimer: coding style clean up of clock constantsIngo Molnar1-14/+9
clean up the CLOCK_ portions of time.h Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10[PATCH] hrtimer: remove unused clock constantsThomas Gleixner1-7/+4
remove unused CLOCK_ constants from time.h Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10[PATCH] hrtimer: clean up mktime and make arguments constIngo Molnar1-5/+5
add 'const' to mktime arguments, and clean it up a bit Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10[PATCH] hrtimer: deinline mktime and set_normalized_timespecThomas Gleixner1-47/+5
mktime() and set_normalized_timespec() are large inline functions used in many places: deinline them. From: George Anzinger, off-by-1 bugfix Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10[PATCH] hrtimer: move div_long_long_rem out of jiffies.hThomas Gleixner2-12/+55
move div_long_long_rem() from jiffies.h into a new calc64.h include file, as it is a general math function useful for other things than the jiffy code. Convert it to an inline function Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10[PATCH] Generic ioctl.hBrian Gerst17-1196/+96
Most arches copied the i386 ioctl.h. Combine them into a generic header. Signed-off-by: Brian Gerst <bgerst@didntduck.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10[PATCH] per-mountpoint noatime/nodiratimeChristoph Hellwig2-7/+6
Turn noatime and nodiratime into per-mount instead of per-sb flags. After all the preparations this is a rather trivial patch. The mount code needs to treat the two options as per-mount instead of per-superblock, and touch_atime needs to be changed to check the new MNT_ flags in addition to the MS_ flags that are kept for filesystems that are always noatime/nodiratime but not user settable anymore. Besides that core code only nfs needed an update because it's leaving atime updates to the server and thus sets the S_NOATIME flag on every inode, but needs to know whether it's a real noatime mount for an getattr optimization. While we're at it I've killed the IS_NOATIME/IS_NODIRATIME macros that were only used by touch_atime. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10[PATCH] sanitize building of fs/compat_ioctl.cChristoph Hellwig1-8/+0
Now that all these entries in the arch ioctl32.c files are gone [1], we can build fs/compat_ioctl.c as a normal object and kill tons of cruft. We need a special do_ioctl32_pointer handler for s390 so the compat_ptr call is done. This is not needed but harmless on all other architectures. Also remove some superflous includes in fs/compat_ioctl.c Tested on ppc64. [1] parisc still had it's PPP handler left, which is not fully correct for ppp and besides that ppp uses the generic SIOCPRIV ioctl so it'd kick in for all netdevice users. We can introduce a proper handler in one of the next patch series by adding a compat_ioctl method to struct net_device but for now let's just kill it - parisc doesn't compile in mainline anyway and I don't want this to block this patchset. Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: Matthew Wilcox <willy@debian.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10[PATCH] __deprecated_for_modules the lookup_hash() prototypeAdrian Bunk1-1/+1
This patch __deprecated_for_modules the lookup_hash() prototype. Signed-off-by: Adrian Bunk <bunk@stusta.de> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10[PATCH] remove update_atimeChristoph Hellwig1-9/+1
All callers use touch_atime now which takes a vfsmount and allows us to implement per-mount noatime. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10[PATCH] replace inode_update_time with file_update_timeChristoph Hellwig1-1/+1
To allow various options to work per-mount instead of per-sb we need a struct vfsmount when updating ctime and mtime. This preparation patch replaces the inode_update_time routine with a file_update_atime routine so we can easily get at the vfsmount. (and the file makes more sense in this context anyway). Also get rid of the unused second argument - we always want to update the ctime when calling this routine. Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: Al Viro <viro@ftp.linux.org.uk> Cc: Anton Altaparmakov <aia21@cantab.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10[PATCH] move xattr permission checks into the VFSakpm@osdl.org1-0/+15
) From: Christoph Hellwig <hch@lst.de> The xattr code has rather complex permission checks because the rules are very different for different attribute namespaces. This patch moves as much as we can into the generic code. Currently all the major disk based filesystems duplicate these checks, while many minor filesystems or network filesystems lack some or all of them. To do this we need defines for the extended attribute names in common code, I moved them up from JFS which had the nicest defintions. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Dave Kleikamp <shaggy@austin.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10[PATCH] add vfs_* helpers for xattr operationsChristoph Hellwig1-0/+4
Add vfs_getxattr, vfs_setxattr and vfs_removexattr helpers for common checks around invocation of the xattr methods. NFSD already was missing some of the checks and there will be more soon. Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: James Morris <jmorris@namei.org> (James, I haven't touched selinux yet because it's doing various odd things and I'm not sure how it would interact with the security attribute fallbacks you added. Could you investigate whether it could use vfs_getxattr or if not add a __vfs_getxattr helper to share the bits it is fine with?) For NFSv4: instead of just converting it add an nfsd_getxattr helper for the code shared by NFSv2/3 and NFSv4 ACLs. In fact that code isn't even NFS-specific, but I'll wait for more users to pop up first before moving it to common code. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Dave Kleikamp <shaggy@austin.ibm.com> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Neil Brown <neilb@suse.de> Cc: Trond Myklebust <trond.myklebust@fys.uio.no> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10[PATCH] kexec: increase max segment limitakpm@osdl.org1-1/+1
) From: Vivek Goyal <vgoyal@in.ibm.com> - In some cases, the number of segments, on a kexec load, exceeds the existing cap of 8. This patch increases the KEXEC_SEGMENT_MAX limit from 8 to 16. Signed-off-by: Rachita Kothiyal <rachita@in.ibm.com> Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10[PATCH] kdump: x86_64 save cpu registers upon crashVivek Goyal1-0/+36
- Saving the cpu registers of all cpus before booting in to the crash kernel. - crash_setup_regs will save the registers of the cpu on which panic has occured. One of the concerns ppc64 folks raised is that after capturing the register states, one should not pop the current call frame and push new one. Hence it has been inlined. More call frames later get pushed on to stack (machine_crash_shutdown() and machine_kexec()), but one will not want to backtrace those. - Not very sure about the CFI annotations. With this patch I am getting decent backtrace with gdb. Assuming, compiler has generated enough debugging information for crash_kexec(). Coding crash_setup_regs() in pure assembly makes it tricky because then it can not be inlined and we don't want to return back after capturing register states we don't want to pop this call frame. - Saving the non-panicing cpus registers will be done in the NMI handler while shooting down them in machine_crash_shutdown. - Introducing CRASH_DUMP option in Kconfig for x86_64. Signed-off-by: Murali M Chakravarthy <muralim@in.ibm.com> Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com> Cc: Andi Kleen <ak@muc.de> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10[PATCH] kdump: x86_64: add memmmap command line optionakpm@osdl.org1-0/+1
) From: Vivek Goyal <vgoyal@in.ibm.com> - This patch introduces the memmap option for x86_64 similar to i386. - memmap=exactmap enables setting of an exact E820 memory map, as specified by the user. Changes in this version: - Used e820_end_of_ram() to find the max_pfn as suggested by Andi kleen. - removed PFN_UP & PFN_DOWN macros - Printing the user defined map also. Signed-off-by: Murali M Chakravarthy <muralim@in.ibm.com> Signed-off-by: Hariprasad Nellitheertha <nharipra@gmail.com> Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com> Cc: Andi Kleen <ak@muc.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10[PATCH] Kdump: powerpc and s390 build failure fixakpm@osdl.org2-0/+10
) From: Vivek Goyal <vgoyal@in.ibm.com> crash_setup_regs() is an architecture dependent function which is called in architecture independent section. So every architecture supporting kexec should at least provide a dummy definition of crash_setup_regs() even if crash dumping is not implemented yet, to avoid build failures. Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10[PATCH] Kdump: i386 compiler warning fixVivek Goyal1-0/+1
Fixes a compilation warning message in i386 Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10[PATCH] kdump: save registers early (inline functions)Vivek Goyal1-0/+45
- If system panics then cpu register states are captured through funciton crash_get_current_regs(). This is not a inline function hence a stack frame is pushed on to the stack and then cpu register state is captured. Later this frame is popped and new frames are pushed (machine_kexec). - In theory this is not very right as we are capturing register states for a frame and that frame is no more valid. This seems to have created back trace problems for ppc64. - This patch fixes it up. The very first thing it does after entering crash_kexec() is to capture the register states. Anyway we don't want the back trace beyond crash_kexec(). crash_get_current_regs() has been made inline - crash_setup_regs() is the top architecture dependent function which should be responsible for capturing the register states as well as to do some architecture dependent tricks. For ex. fixing up ss and esp for i386. crash_setup_regs() has also been made inline to ensure no new call frame is pushed onto stack. Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10[PATCH] kdump: dynamic per cpu allocation of memory for saving cpu registersVivek Goyal5-12/+2
- In case of system crash, current state of cpu registers is saved in memory in elf note format. So far memory for storing elf notes was being allocated statically for NR_CPUS. - This patch introduces dynamic allocation of memory for storing elf notes. It uses alloc_percpu() interface. This should lead to better memory usage. - Introduced based on Andi Kleen's and Eric W. Biederman's suggestions. - This patch also moves memory allocation for elf notes from architecture dependent portion to architecture independent portion. Now crash_notes is architecture independent. The whole idea is that size of memory to be allocated per cpu (MAX_NOTE_BYTES) can be architecture dependent and allocation of this memory can be architecture independent. Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10[PATCH] dump_thread() cleanupakpm@osdl.org2-1/+4
) From: Adrian Bunk <bunk@stusta.de> - create one common dump_thread() prototype in kernel.h - dump_thread() is only used in fs/binfmt_aout.c and can therefore be removed on all architectures where CONFIG_BINFMT_AOUT is not available Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10[PATCH] Add list_for_each_entry_safe_reverse()David Howells1-0/+14
Add list_for_each_entry_safe_reverse() to linux/list.h This is needed by unmerged cachefs and be an as-yet-unreviewed device_shutdown() fix. Signed-off-by: David Howells <dhowells@redhat.com> Cc: Patrick Mochel <mochel@digitalimplant.org> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-10[PATCH] i386: GPIO driver for AMD CS5535/CS5536Ben Gardner1-0/+9
A simple driver for the CS5535 and CS5536 that allows a user-space program to manipulate GPIO pins. The CS5535/CS5536 chips are Geode processor companion devices. Signed-off-by: Ben Gardner <bgardner@wabtec.com> Signed-off-by: Richard Knutsson <ricknu-0@student.ltu.se> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>