- 21 Aug, 2008 15 commits
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Magnus Damm authored
This is V3 of uio_pdrv_genirq.c, a platform driver for UIO with generic IRQ handling code. This driver is very similar to the regular UIO platform driver, but is only suitable for devices that are connected to the interrupt controller using unique interrupt lines. The uio_pdrv_genirq driver includes generic interrupt handling code which disables the serviced interrupt in the interrupt controller and makes the user space driver responsible for acknowledging the interrupt in the device and reenabling the interrupt in the interrupt controller. Shared interrupts are not supported since the in-kernel interrupt handler will disable the interrupt line in the interrupt controller, and in a shared interrupt configuration this will stop other devices from delivering interrupts. Signed-off-by:
Magnus Damm <damm@igel.co.jp> Signed-off-by:
Hans J. Koch <hjk@linutronix.de> Signed-off-by:
Greg Kroah-Hartman <gregkh@suse.de>
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Uwe Kleine-König authored
Thanks to Magnus Damm for pointing that out. Signed-off-by:
Uwe Kleine-König <Uwe.Kleine-Koenig@digi.com> Cc: Magnus Damm <magnus.damm@gmail.com> Acked-by:
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Uwe Kleine-König authored
Thanks to Magnus Damm for pointing that out. Signed-off-by:
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Kay Sievers authored
Otherwise we leak references, which is not a good thing to do. Signed-off-by:
Kay Sievers <kay.sievers@vrfy.org> Signed-off-by:
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Kay Sievers authored
The proc files get truncated if they do not fit into the buffer with a single read(). We need to move the seq_file index from the callback of class_find_device() to the caller of class_find_device(), to keep its value across multiple invocations of the callback. Signed-off-by:
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Rafael J. Wysocki authored
PM: Remove WARN_ON from device_pm_add Fix message in device_pm_add() saying that the device will not be added to dpm_list, although in fact the device is going to be added to the list regardless of the ordering violation. Remove the WARN_ON(true) triggered in that situation, because it is hit by USB very often and spams the users' logs. This patch fixes bug #11263 Signed-off-by:
Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by:
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Greg Kroah-Hartman authored
This gives us a way to handle both the bus_id and init_name values being used for a while during the transition period. Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: -
Alan Stern authored
This patch (as1124) fixes a couple of bugs in the PM core. The new dev->power.status field should be initialized regardless of whether CONFIG_PM_SLEEP is enabled, and similarly dpm_sysfs_add() should be called whenever CONFIG_PM is enabled. The patch separates out the call to dpm_sysfs_add() from the call to device_pm_add(). As a result device_pm_add() can no longer return an error, so its return type is changed to void. Signed-off-by:
Alan Stern <stern@rowland.harvard.edu> Tested-by:
Romit Dasgupta <romit@ti.com> Acked-by:
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David Brownell authored
Anti-oops medicine for the class iterators ... the oops was observed when a class was implicitly referenced before it was initialized. [Modified by Greg to spit a warning back so someone knows to fix their code] Signed-off-by:
David Brownell <dbrownell@users.sourceforge.net> Signed-off-by:
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Jean Delvare authored
Add const markings to dev_name and dev_driver_string to make it clear that dev_printk doesn't modify dev. This is a prerequisite to adding more const markings to other functions make it clearer, which functions can modify dev and which can't. Signed-off-by:
Jean Delvare <khali@linux-fr.org> Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
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Joe Perches authored
Signed-off-by:
Joe Perches <joe@perches.com> Signed-off-by:
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Tsugikazu Shibata authored
Here is a patch for Documentation/ja_JP/HOWTO sync with latest Documentation/HOWTO. It includes translation of changes done by Jon Corbet,Jiri Pirko and me: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=history;f=Documentation/HOWTO;h=c2371c5a98f99b5eaa785bd0affd6c40187e84e3;hb=HEADSinged-off-by:
Tsugikazu Shibata <tshibata@ab.jp.nec.com> Signed-off-by:
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Takenori Nagano authored
Hi, This patch adds SubmitChecklist translated into Japanese to Documentation/ja_JP directory. The translated SubmitChecklist has already been reviewed by JF project. SubmitChecklist is one of the important policy documents. So, I would like to merge into 2.6.27. Signed-off-by:
Takenori Nagano <t-nagano@ah.jp.nec.com> Signed-off-by:
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Ingo Oeser authored
A recent patch from Kay Sievers <kay.sievers@vrfy.org> replaced the first occurrence of '/' with '!' as needed for block devices. Now do some cheap defensive coding and replace all of them to avoid future issues in this area. Signed-off-by:
Ingo Oeser <ioe-lkml@rameria.de> Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by:
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Linus Torvalds authored
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- 20 Aug, 2008 25 commits
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Al Viro authored
After commit a97c9bf3 (fix cramfs making duplicate entries in inode cache) in kernel 2.6.14, named-pipe on cramfs does not work properly. It seems the commit make all named-pipe on cramfs share their inode (and named-pipe buffer). Make ..._test() refuse to merge inodes with ->i_ino == 1, take inode setup back to get_cramfs_inode() and make ->drop_inode() evict ones with ->i_ino == 1 immediately. Reported-by:
Atsushi Nemoto <anemo@mba.ocn.ne.jp> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: <stable@kernel.org> [2.6.14 and later] Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Ian Campbell authored
Fixes kernel BUG at lib/radix-tree.c:473. Previously the handler was incidentally provided by tmpfs but this was removed with: commit 14fcc23f Author: Hugh Dickins <hugh@veritas.com> Date: Mon Jul 28 15:46:19 2008 -0700 tmpfs: fix kernel BUG in shmem_delete_inode relying on this behaviour was incorrect in any case and the BUG also appeared when the device node was on an ext3 filesystem. v2: override a_ops at open() time rather than mmap() time to minimise races per AKPM's concerns. Signed-off-by:
Ian Campbell <ijc@hellion.org.uk> Cc: Jaya Kumar <jayakumar.lkml@gmail.com> Cc: Nick Piggin <npiggin@suse.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Hugh Dickins <hugh@veritas.com> Cc: Johannes Weiner <hannes@saeurebad.de> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Cc: Kel Modderman <kel@otaku42.de> Cc: Markus Armbruster <armbru@redhat.com> Cc: Krzysztof Helt <krzysztof.h1@poczta.fm> Cc: <stable@kernel.org> [14fcc23f is in 2.6.25.14 and 2.6.26.1] Signed-off-by:
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Anton Vorontsov authored
On a PowerPC board with ds1374 RTC I'm getting this error while RTC tries to probe: rtc-ds1374 0-0068: unable to request IRQ This happens because I2C probing code (drivers/of/of_i2c.c) is specifying IRQ0 for 'no irq' case, which is correct. The driver handles this incorrectly, though. This patch fixes it. Signed-off-by:
Anton Vorontsov <avorontsov@ru.mvista.com> Cc: David Brownell <david-b@pacbell.net> Cc: Alessandro Zummo <a.zummo@towertech.it> Acked-by:
Peter Korsgaard <jacmet@sunsite.dk> Signed-off-by:
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Nick Piggin authored
XIP can call into get_xip_mem concurrently with the same file,offset with create=1. This usually maps down to get_block, which expects the page lock to prevent such a situation. This causes ext2 to explode for one reason or another. Serialise those calls for the moment. For common usages today, I suspect get_xip_mem rarely is called to create new blocks. In future as XIP technologies evolve we might need to look at which operations require scalability, and rework the locking to suit. Signed-off-by:
Nick Piggin <npiggin@suse.de> Cc: Jared Hulbert <jaredeh@gmail.com> Acked-by:
Carsten Otte <cotte@freenet.de> Cc: Hugh Dickins <hugh@veritas.com> Signed-off-by:
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Nick Piggin authored
XIP has a race between sparse pages being inserted into page tables, and sparse pages being zapped when its time to put a non-sparse page in. What can happen is that a process can be left with a dangling sparse page in a MAP_SHARED mapping, while the rest of the world sees the non-sparse version. Ie. data corruption. Guard these operations with a seqlock, making fault-in-sparse-pages the slowpath, and try-to-unmap-sparse-pages the fastpath. Signed-off-by:
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Nick Piggin authored
There is a race with dirty page accounting where a page may not properly be accounted for. clear_page_dirty_for_io() calls page_mkclean; then TestClearPageDirty. page_mkclean walks the rmaps for that page, and for each one it cleans and write protects the pte if it was dirty. It uses page_check_address to find the pte. That function has a shortcut to avoid the ptl if the pte is not present. Unfortunately, the pte can be switched to not-present then back to present by other code while holding the page table lock -- this should not be a signal for page_mkclean to ignore that pte, because it may be dirty. For example, powerpc64's set_pte_at will clear a previously present pte before setting it to the desired value. There may also be other code in core mm or in arch which do similar things. The consequence of the bug is loss of data integrity due to msync, and loss of dirty page accounting accuracy. XIP's __xip_unmap could easily also be unreliable (depending on the exact XIP locking scheme), which can lead to data corruption. Fix this by having an option to always take ptl to check the pte in page_check_address. It's possible to retain this optimization for page_referenced and try_to_unmap. Signed-off-by:
Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by:
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Ken Chen authored
When user calls sys_setpriority(PRIO_PGRP ...) on a NPTL style multi-LWP process, only the task leader of the process is affected, all other sibling LWP threads didn't receive the setting. The problem was that the iterator used in sys_setpriority() only iteartes over one task for each process, ignoring all other sibling thread. Introduce a new macro do_each_pid_thread / while_each_pid_thread to walk each thread of a process. Convert 4 call sites in {set/get}priority and ioprio_{set/get}. Signed-off-by:Ken Chen <kenchen@google.com> Cc: Oleg Nesterov <oleg@tv-sign.ru> Cc: Roland McGrath <roland@redhat.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Jens Axboe <jens.axboe@oracle.com> Signed-off-by:
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Michael Hennerich authored
Video/Framebuffer: add fuctional power management support to Blackfin BF54x LQ043 framebuffer driver Fix bug: does nor properply resume after suspend mem Fix for PM_SUSPEND_MEM: Save and restore peripheral base and DMA registers Signed-off-by:
Michael Hennerich <michael.hennerich@analog.com> Signed-off-by:
Bryan Wu <cooloney@kernel.org> Acked-by:
Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by:
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Johannes Weiner authored
Absolute alignment requirements may never be applied to node-relative offsets. Andreas Herrmann spotted this flaw when a bootmem allocation on an unaligned node was itself not aligned because the combination of an unaligned node with an aligned offset into that node is not garuanteed to be aligned itself. This patch introduces two helper functions that align a node-relative index or offset with respect to the node's starting address so that the absolute PFN or virtual address that results from combining the two satisfies the requested alignment. Then all the broken ALIGN()s in alloc_bootmem_core() are replaced by these helpers. Signed-off-by:
Johannes Weiner <hannes@saeurebad.de> Reported-by:
Andreas Herrmann <andreas.herrmann3@amd.com> Debugged-by:
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Andrew Morton authored
If check_legacy_ioport() returns true, we leak *info. Addresses http://bugzilla.kernel.org/show_bug.cgi?id=11362Reported-by:
Daniel Marjamki <danielm77@spray.se> Cc: Christian Krafft <krafft@de.ibm.com> Cc: Michael Ellerman <michael@ellerman.id.au> Cc: Corey Minyard <minyard@acm.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by:
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Krzysztof Helt authored
Release cmap memory allocated in the probe function. Signed-off-by:
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Atsushi Nemoto authored
With commit 5ad31a57 ("rtc: remove BKL for ioctl()"), RTC_UIE_ON ioctl cause double lock on rtc->ops_lock. The ops_lock must not be held while set_uie() calls rtc_read_time() which takes the lock. Also clear_uie() does not need ops_lock. This patch fixes return value of RTC_UIE_OFF ioctl too. Signed-off-by:
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Pavel Emelyanov authored
In case the binfmt_misc binary handler is registered *before* the e.g. script one (when for example being compiled as a module) the following situation may occur: 1. user launches a script, whose interpreter is a misc binary; 2. the load_misc_binary sets the misc_bang and returns -ENOEVEC, since the binary is a script; 3. the load_script_binary loads one and calls for search_binary_hander to run the interpreter; 4. the load_misc_binary is called again, but refuses to load the binary due to misc_bang bit set. The fix is to move the misc_bang setting lower - prior to the actual call to the search_binary_handler. Caused by the commit 3a2e7f47 (binfmt_misc.c: avoid potential kernel stack overflow) Signed-off-by:
Pavel Emelyanov <xemul@openvz.org> Reported-by:
Kirill A. Shutemov <kirill@shutemov.name> Tested-by:
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Akinobu Mita authored
The name of brd block device is "ramdisk", it's not "brd". (The block device is registered by register_blkdev(RAMDISK_MAJOR, "ramdisk") So it should be unregistered by unregister_blkdev(RAMDISK_MAJOR, "ramdisk") Signed-off-by:
Akinobu Mita <akinobu.mita@gmail.com> Acked-by:
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Sven Wegener authored
We leak the memory allocated for the nbd_dev array at multiple places. Fix them by either adding a kfree() or by rearranging code to return before we allocate the memory. Signed-off-by:
Sven Wegener <sven.wegener@stealer.net> Cc: Paul Clements <paul.clements@steeleye.com> Signed-off-by:
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Marcin Slusarz authored
mminit_loglevel is now used from mminit_verify_zonelist <- build_all_zonelists <- 1. online_pages <- memory_block_action <- memory_block_change_state <- store_mem_state (sys handler) 2. numa_zonelist_order_handler (proc handler) so it cannot be annotated __meminit - drop it fixes following section mismatch warning: WARNING: vmlinux.o(.text+0x71628): Section mismatch in reference from the function mminit_verify_zonelist() to the variable .meminit.data:mminit_loglevel The function mminit_verify_zonelist() references the variable __meminitdata mminit_loglevel. This is often because mminit_verify_zonelist lacks a __meminitdata annotation or the annotation of mminit_loglevel is wrong. Signed-off-by:
Marcin Slusarz <marcin.slusarz@gmail.com> Acked-by:
Mel Gorman <mel@csn.ul.ie> Signed-off-by:
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Hugh Dickins authored
Adjust <Alt><SysRq>m show_swap_cache_info() to show "Free swap" as a signed long: the signed format is preferable, because during swapoff nr_swap_pages can legitimately go negative, so makes more sense thus (it used to be shown redundantly, once as signed and once as unsigned). Signed-off-by:
Hugh Dickins <hugh@veritas.com> Reviewed-by:
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by:
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Hugh Dickins authored
Add a comment to s390's page_test_dirty/page_clear_dirty/page_set_dirty dance in page_remove_rmap(): I was wrong to think the PageSwapCache test could be avoided, and would like a comment in there to remind me. And mention s390, to help us remember that this block is not really common. Also move down the "It would be tidy to reset PageAnon" comment: it does not belong to s390's block, and it would be unwise to reset PageAnon before we're done with testing it. Signed-off-by:
Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by:
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Mike Frysinger authored
Signed-off-by:
Mike Frysinger <vapier.adi@gmail.com> Signed-off-by:
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Graf Yang authored
Signed-off-by:
Graf Yang <graf.yang@analog.com> Signed-off-by:
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Mike Frysinger authored
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Mike Frysinger authored
Blackfin RTC Driver: move irq request/free out of open/release and into probe/remove so that the non-dev interfaces (like sysfs) work as expected Signed-off-by:
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Clement Calmels authored
This addresses http://bugzilla.kernel.org/show_bug.cgi?id=11318 In function show_map (file: fs/proc/task_mmu.c), if vma->vm_pgoff > 2^20 than (vma->vm_pgoff << PAGE_SIZE) is greater than 2^32 (with PAGE_SIZE equal to 4096 (i.e. 2^12). The next seq_printf use an unsigned long for the conversion of (vma->vm_pgoff << PAGE_SIZE), as a result the offset value displayed in /proc/self/maps is truncated if the page offset is greater than 2^20. A test that shows this issue: #define _GNU_SOURCE #include <sys/types.h> #include <sys/stat.h> #include <sys/mman.h> #include <stdlib.h> #include <stdio.h> #include <fcntl.h> #include <unistd.h> #include <string.h> #define PAGE_SIZE (getpagesize()) #if __i386__ # define U64_STR "%llx" #elif __x86_64 # define U64_STR "%lx" #else # error "Architecture Unsupported" #endif int main(int argc, char *argv[]) { int fd; char *addr; off64_t offset = 0x10000000; char *filename = "/dev/zero"; fd = open(filename, O_RDONLY); if (fd < 0) { perror("open"); return 1; } offset *= 0x10; printf("offset = " U64_STR "\n", offset); addr = (char*)mmap64(NULL, PAGE_SIZE, PROT_READ, MAP_PRIVATE, fd, offset); if ((void*)addr == MAP_FAILED) { perror("mmap64"); return 1; } { FILE *fmaps; char *line = NULL; size_t len = 0; ssize_t read; size_t filename_len = strlen(filename); fmaps = fopen("/proc/self/maps", "r"); if (!fmaps) { perror("fopen"); return 1; } while ((read = getline(&line, &len, fmaps)) != -1) { if ((read > filename_len + 1) && (strncmp(&line[read - filename_len - 1], filename, filename_len) == 0)) printf("%s", line); } if (line) free(line); fclose(fmaps); } close(fd); return 0; } [akpm@linux-foundation.org: coding-style fixes] Signed-off-by:
Clement Calmels <cboulte@gmail.com> Signed-off-by:
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Andreas Herrmann authored
"bootmem_debug" is not mentioned in kernel-parameters.txt. Recently I had to use that kernel option and I think it should be documented. Signed-off-by:
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Matthew Garrett authored
eeepc-laptop uses the hwmon struct after unregistering the device, causing an oops on module unload. Flip the ordering to fix. Signed-off-by:
Matthew Garrett <mjg@redhat.com> Cc: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Cc: Corentin Chary <corentincj@iksaif.net> Cc: Karol Kozimor <sziwan@users.sourceforge.net> Cc: <stable@kernel.org> [2.6.26.x] Signed-off-by:
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