- 23 Mar, 2011 40 commits
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Tejun Heo authored
tracehook_notify_jctl() aids in determining whether and what to report to the parent when a task is stopped or continued. The function also adds an extra requirement that siglock may be released across it, which is currently unused and quite difficult to satisfy in well-defined manner. As job control and the notifications are about to receive major overhaul, remove the tracehook and open code it. If ever necessary, let's factor it out after the overhaul. * Oleg spotted incorrect CLD_CONTINUED/STOPPED selection when ptraced. Fixed. Signed-off-by:Tejun Heo <tj@kernel.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Roland McGrath <roland@redhat.com>
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Tejun Heo authored
do_signal_stop() is used only by get_signal_to_deliver() and after a successful signal stop, it always calls try_to_freeze(), so the try_to_freeze() loop around schedule() in do_signal_stop() is superflous and confusing. Remove it. Signed-off-by:
Rafael J. Wysocki <rjw@sisk.pl> Acked-by:
Oleg Nesterov <oleg@redhat.com> Acked-by:
Roland McGrath <roland@redhat.com>
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Tejun Heo authored
This wake_up_state() has a turbulent history. This is a remnant from ancient ptrace implementation and patently wrong. Commit 95a3540d (ptrace_detach: the wrong wakeup breaks the ERESTARTxxx logic) removed it but the change was reverted later by commit edaba2c5 (ptrace: revert "ptrace_detach: the wrong wakeup breaks the ERESTARTxxx logic") citing compatibility breakage and general brokeness of the whole group stop / ptrace interaction. Then, recently, it got converted from wake_up_process() to wake_up_state() to make it less dangerous. Digging through the mailing archives, the compatibility breakage doesn't seem to be critical in the sense that the behavior isn't well defined or reliable to begin with and it seems to have been agreed to remove the wakeup with proper cleanup of the whole thing. Now that the group stop and its interaction with ptrace are being cleaned up, it's high time to finally kill this silliness. Signed-off-by:
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Tejun Heo authored
After a task receives SIGCONT, its parent is notified via SIGCHLD with its siginfo describing what the notified event is. If SIGCONT is received while the child process is stopped, the code should be CLD_CONTINUED. If SIGCONT is recieved while the child process is in the process of being stopped, it should be CLD_STOPPED. Which code to use is determined in prepare_signal() and recorded in signal->flags using SIGNAL_CLD_CONTINUED|STOP flags. get_signal_deliver() should test these flags and then notify accoringly; however, it incorrectly tested SIGNAL_STOP_CONTINUED instead of SIGNAL_CLD_CONTINUED, thus incorrectly notifying CLD_CONTINUED if the signal is delivered before the task is wait(2)ed and CLD_STOPPED if the state was fetched already. Fix it by testing SIGNAL_CLD_CONTINUED. While at it, uncompress the ?: test into if/else clause for better readability. Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_txLinus Torvalds authored
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx: (66 commits) avr32: at32ap700x: fix typo in DMA master configuration dmaengine/dmatest: Pass timeout via module params dma: let IMX_DMA depend on IMX_HAVE_DMA_V1 instead of an explicit list of SoCs fsldma: make halt behave nicely on all supported controllers fsldma: reduce locking during descriptor cleanup fsldma: support async_tx dependencies and automatic unmapping fsldma: fix controller lockups fsldma: minor codingstyle and consistency fixes fsldma: improve link descriptor debugging fsldma: use channel name in printk output fsldma: move related helper functions near each other dmatest: fix automatic buffer unmap type drivers, pch_dma: Fix warning when CONFIG_PM=n. dmaengine/dw_dmac fix: use readl & writel instead of __raw_readl & __raw_writel avr32: at32ap700x: Specify DMA Flow Controller, Src and Dst msize dw_dmac: Setting Default Burst length for transfers as 16. dw_dmac: Allow src/dst msize & flow controller to be configured at runtime dw_dmac: Changing type of src_master and dest_master to u8. dw_dmac: Pass Channel Priority from platform_data dw_dmac: Pass Channel Allocation Order from platform_data ...
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Jean Delvare authored
I'm not sure why the read-only data section is excluded from the report, it seems as relevant as the other data sections (b and d). I've stripped the symbols starting with __mod_ as they can have their names dynamically generated and thus comparison between binaries is not possible. Signed-off-by:
Jean Delvare <khali@linux-fr.org> Cc: Andi Kleen <andi@firstfloor.org> Acked-by:
Nathan Lynch <ntl@pobox.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Jim Keniston authored
Instead of always creating a huge (268K) deflate_workspace with the maximum compression parameters (windowBits=15, memLevel=8), allow the caller to obtain a smaller workspace by specifying smaller parameter values. For example, when capturing oops and panic reports to a medium with limited capacity, such as NVRAM, compression may be the only way to capture the whole report. In this case, a small workspace (24K works fine) is a win, whether you allocate the workspace when you need it (i.e., during an oops or panic) or at boot time. I've verified that this patch works with all accepted values of windowBits (positive and negative), memLevel, and compression level. Signed-off-by:
Jim Keniston <jkenisto@us.ibm.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: David Miller <davem@davemloft.net> Cc: Chris Mason <chris.mason@oracle.com> Signed-off-by:
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Andrey Vagin authored
d_alloc_name return NULL in case error, but we expect errno in devpts_pty_new. Addresses http://bugzilla.openvz.org/show_bug.cgi?id=1758Signed-off-by:
Andrey Vagin <avagin@openvz.org> Signed-off-by:
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Roland Dreier authored
The test program below will hang because io_getevents() uses add_wait_queue_exclusive(), which means the wake_up() in io_destroy() only wakes up one of the threads. Fix this by using wake_up_all() in the aio code paths where we want to make sure no one gets stuck. // t.c -- compile with gcc -lpthread -laio t.c #include <libaio.h> #include <pthread.h> #include <stdio.h> #include <unistd.h> static const int nthr = 2; void *getev(void *ctx) { struct io_event ev; io_getevents(ctx, 1, 1, &ev, NULL); printf("io_getevents returned\n"); return NULL; } int main(int argc, char *argv[]) { io_context_t ctx = 0; pthread_t thread[nthr]; int i; io_setup(1024, &ctx); for (i = 0; i < nthr; ++i) pthread_create(&thread[i], NULL, getev, ctx); sleep(1); io_destroy(ctx); for (i = 0; i < nthr; ++i) pthread_join(thread[i], NULL); return 0; } Signed-off-by:Roland Dreier <roland@purestorage.com> Reviewed-by:
Jeff Moyer <jmoyer@redhat.com> Cc: <stable@kernel.org> Signed-off-by:
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Alexander Gordeev authored
Remove code enabled only when CONFIG_PREEMPT_RT is turned on because it is not used in the vanilla kernel. Signed-off-by:
Alexander Gordeev <lasaine@lvk.cs.msu.su> Cc: john stultz <johnstul@us.ibm.com> Cc: Rodolfo Giometti <giometti@linux.it> Signed-off-by:
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Stuart Swales authored
ADFS (FileCore) storage complies with the RISC OS filetype specification (12 bits of file type information is stored in the file load address, rather than using a file extension). The existing driver largely ignores this information and does not present it to the end user. It is desirable that stored filetypes be made visible to the end user to facilitate a precise copy of data and metadata from a hard disc (or image thereof) into a RISC OS emulator (such as RPCEmu) or to a network share which can be accessed by real Acorn systems. This patch implements a per-mount filetype suffix option (use -o ftsuffix=1) to present any filetype as a ,xyz hexadecimal suffix on each file. This type suffix is compatible with that used by RISC OS systems that access network servers using NFS client software and by RPCemu's host filing system. Signed-off-by:
Stuart Swales <stuart.swales.croftnuisk@gmail.com> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by:
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Stuart Swales authored
ADFS (FileCore) storage complies with the RISC OS timestamp specification (40-bit centiseconds since 01 Jan 1900 00:00:00). It is desirable that stored timestamp precision be maintained to facilitate a precise copy of data and metadata from a hard disc (or image thereof) into a RISC OS emulator (such as RPCEmu). This patch implements a full-precision conversion from ADFS to Unix timestamp as the existing driver, for ease of calculation with old 32-bit compilers, uses the common trick of shifting the 40-bits representing centiseconds around into 32-bits representing seconds thereby losing precision. Signed-off-by: Stuart Swales<stuart.swales.croftnuisk@gmail.com> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by:
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Stuart Swales authored
Kernel crashes in fs/adfs module when accessing directories with a large number of objects on mounted Acorn ADFS E+/F+ format discs (or images) as the existing code writes off the end of the fixed array of struct buffer_head pointers. Additionally, each directory access that didn't crash would leak a buffer as nr_buffers was not adjusted correctly for E+/F+ discs (was always left as one less than required). The patch fixes this by allocating a dynamically-sized set of struct buffer_head pointers if necessary for the E+/F+ case (many directories still do in fact fit in 2048 bytes) and sets the correct nr_buffers so that all buffers are released. Addresses https://bugzilla.kernel.org/show_bug.cgi?id=26072 Tested by tar'ing the contents of my RISC PC's E+ format 20Gb HDD which contains a number of large directories that previously crashed the kernel. Signed-off-by:
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Chen Gong authored
page-types.c doesn't supply a way to specify the debugfs path and the original debugfs path is not usual on most machines. This patch supplies a way to auto mount debugfs if needed. This patch is heavily inspired by tools/perf/utils/debugfs.c [akpm@linux-foundation.org: make functions static] [akpm@linux-foundation.org: fix debugfs_mount() signature] Signed-off-by:
Chen Gong <gong.chen@linux.intel.com> Reviewed-by:
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Reviewed-by:
Wu Fengguang <fengguang.wu@intel.com> Signed-off-by:
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Christian Kujau authored
I noticed the 'mcelog' program had no comment and then ended up "fixing" a few more things: * reiserfsck -V does not print "reiserfsprogs" (any more?) * is "udevinfo" still shipped? udevd certainly is * grub2 doesn't have a 'grub' binary * add a "# how to get the mcelog version" comment Signed-off-by:
Christian Kujau <lists@nerdbynature.de> Signed-off-by:
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Harry Wei authored
There is a missing case for "Chapter 3: Placing Braces and Spaces". We often know we should not use braces where a single statement. The first case is: if (condition) action(); Another case is: if (condition) do_this(); else do_that(); However, I can not find a description of the second case. Signed-off-by:
Harry Wei <harryxiyou@gmail.com> Cc: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by:
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Rakib Mullick authored
When CONFIG_SYSCTL=n, we get the following warning: fs/coda/sysctl.c:18: warning: `coda_tabl' defined but not used Fix the warning by making sure coda_table and it's callee function are in the same context. Also clean up the code by removing extra #ifdef. [akpm@linux-foundation.org: remove unneeded stub macros] Signed-off-by:
Rakib Mullick <rakib.mullick@gmail.com> Cc: Jan Harkes <jaharkes@cs.cmu.edu> Signed-off-by:
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David Rientjes authored
Not all 64-bit systems require ISA-style DMA, so allow it to be configurable. x86 utilizes the generic ISA DMA allocator from kernel/dma.c, so require it only when CONFIG_ISA_DMA_API is enabled. Disabling CONFIG_ISA_DMA_API is dependent on x86_64 since those machines do not have ISA slots and benefit the most from disabling the option (and on CONFIG_EXPERT as required by H. Peter Anvin). When disabled, this also avoids declaring claim_dma_lock(), release_dma_lock(), request_dma(), and free_dma() since those interfaces will no longer be provided. Signed-off-by:
David Rientjes <rientjes@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Bjorn Helgaas <bjorn.helgaas@hp.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: "Luck, Tony" <tony.luck@intel.com> Signed-off-by:
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David Rientjes authored
The generic floppy disk driver utilizies the interface provided by CONFIG_ISA_DMA_API, specifically claim_dma_lock(), release_dma_lock(), request_dma(), and free_dma(). Thus, there's a strict dependency on the config option and the driver should only be loaded if the kernel supports ISA-style DMA. Signed-off-by:
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David Rientjes authored
8237A utilizes the interface provided by CONFIG_ISA_DMA_API, specifically claim_dma_lock() and release_dma_lock(). Thus, there's a strict dependency on the config option and the module should only be loaded if the kernel supports ISA-style DMA. Signed-off-by:
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David Rientjes authored
IORESOURCE_DMA cannot be assigned without utilizing the interface provided by CONFIG_ISA_DMA_API, specifically request_dma() and free_dma(). Thus, there's a strict dependency on the config option and limits IORESOURCE_DMA only to architectures that support ISA-style DMA. ia64 is not one of those architectures, so pnp_check_dma() no longer needs to be special-cased for that architecture. pnp_assign_resources() will now return -EINVAL if IORESOURCE_DMA is attempted on such a kernel. Signed-off-by:
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Andrew Chew authored
This is a platform driver that supports the built-in real-time clock on Tegra SOCs. Signed-off-by:
Andrew Chew <achew@nvidia.com> Acked-by:
Alessandro Zummo <a.zummo@towertech.it> Acked-by:
Wan ZongShun <mcuos.com@gmail.com> Acked-by:
Jon Mayo <jmayo@nvidia.com> Signed-off-by:
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Vasiliy Kulikov authored
Don't allow everybogy to write to NVRAM. Signed-off-by:
Vasiliy Kulikov <segoon@openwall.com> Cc: Andy Sharp <andy.sharp@onstor.com> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by:
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Ryan Mallon authored
Add alarm/wakeup support to rtc isl1208 driver Signed-off-by:
Ryan Mallon <ryan@bluewatersys.com> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by:
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Mark Brown authored
There is a general move to replace bus-specific PM ops with dev_pm_ops in order to facilitate core improvements. Do this conversion for DS1374. Signed-off-by:
Mark Brown <broonie@opensource.wolfsonmicro.com> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: john stultz <johnstul@us.ibm.com> Signed-off-by:
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Davidlohr Bueso authored
In do_mounts_rd() if memory cannot be allocated, return -ENOMEM. Signed-off-by:
Davidlohr Bueso <dave@gnu.org> Signed-off-by:
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David Daney authored
With GCC-4.6 we get warnings about things being 'set but not used'. In load_elf_binary() this can happen with reloc_func_desc if ELF_PLAT_INIT is defined, but doesn't use the reloc_func_desc argument. Quiet the warning/error by marking reloc_func_desc as __maybe_unused. Signed-off-by:
David Daney <ddaney@caviumnetworks.com> Signed-off-by:
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Shawn Bohrer authored
Add a comment to ep_poll(), rename labels a bit clearly, fix a warning of unused variable from gcc and optimize the non-blocking path a little. Hinted-by:
Davide Libenzi <davidel@xmailserver.org> hannes@cmpxchg.org: : The non-blocking ep_poll path optimization introduced skipping over the : return value setup. : : Initialize it properly, my userspace gets upset by epoll_wait() returning : random things. : : In addition, remove the reinitialization at the fetch_events label, the : return value is garuanteed to be zero when execution reaches there. [hannes@cmpxchg.org: fix initialization] Signed-off-by:
Johannes Weiner <hannes@cmpxchg.org> Cc: Shawn Bohrer <shawn.bohrer@gmail.com> Acked-by:
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Davide Libenzi authored
Move the event readiness check into a proper inline, and use it uniformly inside ep_poll() code. Events in the ->ovflist are no less ready than the ones in ->rdllist. Signed-off-by:
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Konstantin Khlebnikov authored
Add brackets around typecasted argument in crc32() macro. Signed-off-by:
Konstantin Khlebnikov <khlebnikov@openvz.org> Signed-off-by:
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Dave Jones authored
Because the second and third arguments of memset have the same type, it turns out to be really easy to mix them up. This bug comes up time after time, so checkpatch should really be checking for it at patch submission time. Signed-off-by:
Dave Jones <davej@redhat.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Andy Whitcroft <apw@shadowen.org> Signed-off-by:
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Mike Frysinger authored
If you run checkpatch against multiple patches, and one of them has a whitespace issue which can be helped via a script (rpt_cleaners), you will see the same NOTE over and over for all subsequent patches. It makes it seem like those patches also have whitespace problems when in reality, there's only one or two bad apples. So reset rpt_cleaners back to 0 after we've issued the note so that it only shows up near the patch with the actual problems. Signed-off-by:
Mike Frysinger <vapier@gentoo.org> Cc: Andy Whitcroft <apw@canonical.com> Signed-off-by:
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Chris Ball authored
Use resource_size(). Signed-off-by:
Chris Ball <cjb@laptop.org> Cc: Madhusudhan Chikkature <madhu.cr@ti.com> Cc: <linux-mmc@vger.kernel.org> Signed-off-by:
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Chris Ball authored
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Mike Frysinger authored
Analog Devices' SigmaStudio can produce firmware blobs for devices with these DSPs embedded (like some audio codecs). Allow these device drivers to easily parse and load them. Signed-off-by:
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Alexey Dobriyan authored
1. simple_strto*() do not contain overflow checks and crufty, libc way to indicate failure. 2. strict_strto*() also do not have overflow checks but the name and comments pretend they do. 3. Both families have only "long long" and "long" variants, but users want strtou8() 4. Both "simple" and "strict" prefixes are wrong: Simple doesn't exactly say what's so simple, strict should not exist because conversion should be strict by default. The solution is to use "k" prefix and add convertors for more types. Enter kstrtoull() kstrtoll() kstrtoul() kstrtol() kstrtouint() kstrtoint() kstrtou64() kstrtos64() kstrtou32() kstrtos32() kstrtou16() kstrtos16() kstrtou8() kstrtos8() Include runtime testsuite (somewhat incomplete) as well. strict_strto*() become deprecated, stubbed to kstrto*() and eventually will be removed altogether. Use kstrto*() in code today! Note: on some archs _kstrtoul() and _kstrtol() are left in tree, even if they'll be unused at runtime. This is temporarily solution, because I don't want to hardcode list of archs where these functions aren't needed. Current solution with sizeof() and __alignof__ at least always works. Signed-off-by:Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by:
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Kenneth Heitke authored
Signed-off-by:
Kenneth Heitke <kheitke@codeaurora.org> Signed-off-by:
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Joe Perches authored
commit 5b2e303f ("[media] rc-core: convert winbond-cir") moved the files, update the pattern. Signed-off-by:
Joe Perches <joe@perches.com> Acked-by:
David Härdeman <david@hardeman.nu> Acked-by:
Mauro Carvalho Chehab <mchehab@redhat.com> Signed-off-by:
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Joe Perches authored
And set the status to Orphan. Signed-off-by:
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Joe Perches authored
commit 937f961a ("x86: Move sfi to platform") moved the files, update the pattern. Signed-off-by:
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