- 16 Oct, 2008 40 commits
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Andi Kleen authored
For this year's OLS I wrote a paper on successfull strategies to submit difficult kernel patches. Add a reference to it to SubmittingPatches. Signed-off-by:
Andi Kleen <ak@linux.intel.com> Acked-by:
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Bernhard Walle authored
This adds "panic_on_unrecovered_nmi" sysctl to Documentation/filesystems/proc.txt. The text is mainly taken from http://readlist.com/lists/vger.kernel.org/linux-kernel/43/217998.html. Signed-off-by:
Bernhard Walle <bwalle@suse.de> Signed-off-by:
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Randy Dunlap authored
Move print_tainted() kernel-doc to avoid the following error: Error(/var/linsrc/mmotm-2008-1002-1617//kernel/panic.c:155): cannot understand prototype: 'struct tnt ' Signed-off-by:
Randy Dunlap <randy.dunlap@oracle.com> Cc: Andi Kleen <andi@firstfloor.org> Signed-off-by:
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http://www.zip.com.au/~akpm/FD Cami authored
Remove Andrew Morton's http://www.zip.com.au/~akpm/ urls, update to new ones when necessary, delete references otherwise. There are still instances of that living in: Documentation/zh_CN/HOWTO Documentation/zh_CN/SubmittingPatches Documentation/ko_KR/HOWTO Documentation/ja_JP/SubmittingPatches Signed-off-by:
Francois Cami <francois.cami@free.fr> Signed-off-by:
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Francois Cami authored
People can use the real name an an index into MAINTAINERS to find the current email address. Signed-off-by:
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Randy Dunlap authored
We want all uses of memory barriers to be explained in the source code. Signed-off-by:
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WANG Cong authored
Commit 6dd06c9f ("module: make module_address_lookup safe") introduced double returns in the function kallsyms_lookup(), it's weird. The second one should be removed. Signed-off-by:
WANG Cong <wangcong@zeuux.org> Cc: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by:
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Davide Libenzi authored
Thomas found that there is an unnecessary (always true) test in ep_send_events(). The callback never inserts into ->rdllink while the send loop is performed, and also does the ~EP_PRIVATE_BITS test. Given we're holding the mutex during this time, the conditions tested inside the loop are always true. This patch drops the test done inside the re-insertion loop. Signed-off-by:
Davide Libenzi <davidel@xmailserver.org> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by:
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Andrew Victor authored
Only three of Atmel's AT91 processors (SAM9263, SAM9RL and CAP9) include a PWM controller. It should therefore only be possible to enable the misc/atmel_pwm.c driver on those processors (and not all AT91 processors). Signed-off-by:
Andrew Victor <linux@maxim.org.za> Cc: Haavard Skinnemoen <hskinnemoen@atmel.com> Signed-off-by:
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Alberto Bertogli authored
Signed-off-by:
Alberto Bertogli <albertito@blitiri.com.ar> Signed-off-by:
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Jason Baron authored
With MAX_ARG_STRINGS set to 0x7FFFFFFF, and being passed to 'count()' and compat_count(), it would appear that the current max bounds check of fs/exec.c:394: if(++i > max) return -E2BIG; would never trigger. Since 'i' is of type int, so values would wrap and the function would continue looping. Simple fix seems to be chaning ++i to i++ and checking for '>='. Signed-off-by:
Jason Baron <jbaron@redhat.com> Acked-by:
Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: "Ollie Wild" <aaw@google.com> Signed-off-by:
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Andrew Morton authored
utsname() is quite expensive to calculate. Cache it in a local. text data bss dec hex filename before: 11136 720 16 11872 2e60 kernel/sys.o after: 11096 720 16 11832 2e38 kernel/sys.o Acked-by:Vegard Nossum <vegard.nossum@gmail.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Acked-by:
"Serge E. Hallyn" <serue@us.ibm.com> Signed-off-by:
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Vegard Nossum authored
On sethostname() and setdomainname(), previous information may be retained if it was longer than than the new hostname/domainname. This can be demonstrated trivially by calling sethostname() first with a long name, then with a short name, and then calling uname() to retrieve the full buffer that contains the hostname (and possibly parts of the old hostname), one just has to look past the terminating zero. I don't know if we should really care that much (hence the RFC); the only scenarios I can possibly think of is administrator putting something sensitive in the hostname (or domain name) by accident, and changing it back will not undo the mistake entirely, though it's not like we can recover gracefully from "rm -rf /" either... The other scenario is namespaces (CLONE_NEWUTS) where some information may be unintentionally "inherited" from the previous namespace (a program wants to hide the original name and does clone + sethostname, but some information is still left). I think the patch may be defended on grounds of the principle of least surprise. But I am not adamant :-) (I guess the question now is whether userspace should be able to write embedded NULs into the buffer or not...) At least the observation has been made and the patch has been presented. Signed-off-by:
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Randy Dunlap authored
defkeymap.c_shipped should be diffed if it is changed. Reported-by:
Mike Galbraith <efault@gmx.de> COPYING, CREDITS, .mailmap should be diffed if they are changed. keywords.c_shipped & lex.c_shipped should be diffed when changed. parse.[ch]_shipped should be diffed when changed. Reported-by:
Sam Ravnborg <sam@ravnborg.org> vsyscall* updates from a .gitignore patch by "Denis V. Lunev" <den@openvz.org>. *.so.dbg from a .gitignore patch by Thomas Gleixner <tglx@linutronix.de>. binoffset from a .gitignore patch by Uwe Kleine-Koenig <Uwe.Kleine-Koenig@digi.com>. Module.markers from a .gitignore patch by Matthew Wilcox <willy@linux.intel.com>. vmlinux*.lds* should be diffed if changed. Reported-by:
Etienne Lorrain <etienne_lorrain@yahoo.fr> vmlinux.lds from a .gitignore patch by Daniel Guilak <daniel@danielguilak.com>. *.scr should be diffed if changed. Lots of updates from http://lkml.org/lkml/2008/5/20/32 Reported-by: Bart Van Assche <bart.vanassche@gmail.com> Use ncscope.* instead of *cscope* since the latter may catch too many files. Add *.elf, from a .gitignore patch by Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro>. Make firmware entries match .gitignore entries. Make some entries less greedy by removing trailing '*'. Remove "make_times_h" (no such file). Remove "filelist" (no such file). Remove "dummy_sym.c" (no such file). Remove "gen-kdb_cmds.c" (no such file). Remove "gentbl" (no such file). Remove "kconfig.tk" (no such file). Remove "tkparse" (no such file). Remove "sim710_d.h" (no such file). Remove "53c8xx_d.h" (no such file). Add "syscalltab.h" (generated file). Signed-off-by:
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Shane McDonald authored
Add a missing word to the explanation of the purpose of the zdisk and bzdisk make targets. Signed-off-by:
Shane McDonald <mcdonald.shane@gmail.com> Signed-off-by:
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Dave Hansen authored
Way too often, I have a machine that exhibits some kind of crappy behavior. The CPU looks wedged in the kernel or it is spending way too much system time and I wonder what is responsible. I try to run readprofile. But, of course, Ubuntu doesn't enable it by default. Dang! The reason we boot-time enable it is that it takes a big bufffer that we generally can only bootmem alloc. But, does it hurt to at least try and runtime-alloc it? To use: echo 2 > /sys/kernel/profile Then run readprofile like normal. This should fix the compile issue with allmodconfig. I've compile-tested on a bunch more configs now including a few more architectures. Signed-off-by:
Dave Hansen <dave@linux.vnet.ibm.com> Acked-by:
Ingo Molnar <mingo@elte.hu> Signed-off-by:
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Adam Tkac authored
When a process wants to set the limit of open files to RLIM_INFINITY it gets EPERM even if it has CAP_SYS_RESOURCE capability. For example, BIND does: ... #elif defined(NR_OPEN) && defined(__linux__) /* * Some Linux kernels don't accept RLIM_INFINIT; the maximum * possible value is the NR_OPEN defined in linux/fs.h. */ if (resource == isc_resource_openfiles && rlim_value == RLIM_INFINITY) { rl.rlim_cur = rl.rlim_max = NR_OPEN; unixresult = setrlimit(unixresource, &rl); if (unixresult == 0) return (ISC_R_SUCCESS); } #elif ... If we allow setting RLIMIT_NOFILE to RLIM_INFINITY we increase portability - you don't have to check if OS is linux and then use different schema for limits. The spec says "Specifying RLIM_INFINITY as any resource limit value on a successful call to setrlimit() shall inhibit enforcement of that resource limit." and we're presently not doing that. Cc: Michael Kerrisk <mtk.manpages@googlemail.com> Signed-off-by: -
Naohiro Ooiwa authored
It is written in the Documentation/sysrq.txt that oom-killer is enabled when we set "64" in /proc/sys/kernel/sysrq: <Documentation/sysrq.txt> Here is the list of possible values in /proc/sys/kernel/sysrq: 64 - enable signalling of processes (term, kill, oom-kill) ^^^^^^^^ but enable_mask is not set in sysrq_moom_op. Signed-off-by:Naohiro Ooiwa <nooiwa@miraclelinux.com> Signed-off-by:
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Andi Kleen authored
It's somewhat unlikely that it happens, but right now a race window between interrupts or machine checks or oopses could corrupt the tainted bitmap because it is modified in a non atomic fashion. Convert the taint variable to an unsigned long and use only atomic bit operations on it. Unfortunately this means the intvec sysctl functions cannot be used on it anymore. It turned out the taint sysctl handler could actually be simplified a bit (since it only increases capabilities) so this patch actually removes code. [akpm@linux-foundation.org: remove unneeded include] Signed-off-by:
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Nye Liu authored
When unpacking the cpio into the initramfs, mtimes are not preserved by default. This patch adds an INITRAMFS_PRESERVE_MTIME option that allows mtimes stored in the cpio image to be used when constructing the initramfs. For embedded applications that run exclusively out of the initramfs, this is invaluable: When building embedded application initramfs images, its nice to know when the files were actually created during the build process - that makes it easier to see what files were modified when so we can compare the files that are being used on the image with the files used during the build process. This might help (for example) to determine if the target system has all the updated files you expect to see w/o having to check MD5s etc. In our environment, the whole system runs off the initramfs partition, and seeing the modified times of the shared libraries (for example) helps us find bugs that may have been introduced by the build system incorrectly propogating outdated shared libraries into the image. Similarly, many of the initializion/configuration files in /etc might be dynamically built by the build system, and knowing when they were modified helps us sanity check whether the target system has the "latest" files etc. Finally, we might use last modified times to determine whether a hot fix should be applied or not to the running ramfs. Signed-off-by:
Nye Liu <nyet@nyet.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by:
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Jan Beulich authored
Using "def_bool n" is pointless, simply using bool here appears more appropriate. Further, retaining such options that don't have a prompt and aren't selected by anything seems also at least questionable. Signed-off-by:
Jan Beulich <jbeulich@novell.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Tony Luck <tony.luck@intel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Cc: Sam Ravnborg <sam@ravnborg.org> Signed-off-by:
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Tejun Heo authored
is_sync_wait() is used to distinguish between sync and async waits. Basically sync waits are the ones initialized with init_waitqueue_entry() and async ones with init_waitqueue_func_entry(). The sync/async distinction is used only in prepare_to_wait[_exclusive]() and its only function is to skip setting the current task state if the wait is async. This has a few problems. * No one uses it. None of func_entry users use prepare_to_wait() functions, so the code path never gets executed. * The distinction is bogus. Maybe back when func_entry is used only by aio but it's now also used by epoll and in future possibly by 9p and poll/select. * Taking @state as argument and ignoring it silenly depending on how @wait is initialized is just a bad error-prone API. * It prevents func_entry waits from using wait->private for no good reason. This patch kills is_sync_wait() and the associated code paths from prepare_to_wait[_exclusive](). As there was no user of these code paths, this patch doesn't cause any behavior difference. Signed-off-by:
Tejun Heo <tj@kernel.org> Acked-by:
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Bjorn Helgaas authored
Use the '%pF' format to get rid of an "#ifdef DEBUG" and make some printks atomic. This removes the last in-tree uses of print_fn_descriptor_symbol(). I marked print_fn_descriptor_symbol() deprecated and scheduled it for removal next year to give time for out-of-tree modules to be updated. parisc's print_fn_descriptor_symbol() is currently broken there (it needs to dereference the function pointer similar to ia64 and power). This patch shouldn't make anything worse, but it means we need to fix dereference_function_descriptor() instead of print_fn_descriptor_symbol() to get meaningful initcall_debug output. Signed-off-by:
Bjorn Helgaas <bjorn.helgaas@hp.com> Cc: Jesse Barnes <jbarnes@virtuousgeek.org> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: Kay Sievers <kay.sievers@vrfy.org> Cc: Greg KH <greg@kroah.com> Signed-off-by:
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Danny ter Haar authored
Signed-off-by:
Danny ter Haar <dth@cistron.nl> Cc: Patrick McHardy <kaber@trash.net> Cc: Mikael Starvik <starvik@axis.com> Cc: Avi Kivity <avi@qumranet.com> Signed-off-by:
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Geert Uytterhoeven authored
identify_ramdisk_image() returns 0 (not -1) if a gzipped ramdisk is found: if (buf[0] == 037 && ((buf[1] == 0213) || (buf[1] == 0236))) { printk(KERN_NOTICE "RAMDISK: Compressed image found at block %d\n", start_block); nblocks = 0; ^^^^^^^^^^^ goto done; } ... done: sys_lseek(fd, start_block * BLOCK_SIZE, 0); kfree(buf); return nblocks; ^^^^^^^^^^^^^^ Hence correct the typo in the comment, which has existed since the addition of compressed ramdisk support in 1.3.48. Signed-off-by:Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Signed-off-by:
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Ilpo Järvinen authored
It seems this is the right way around because otherwise the len usage in the outer loop would be pretty pointless. Signed-off-by:
Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> Signed-off-by:
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frans authored
First a file hello.c is created, then the file hello2.c is compiled. Change this to hello.c Signed-off-by:
Frans Meulenbroeks <fransmeulenbroeks@gmail.com> Signed-off-by:
Rob Landley <rob@landley.net> Signed-off-by:
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Randy Dunlap authored
EEEPC_LAPTOP uses RFKILL, so the former should depend on RFKILL. Build errors happen when EEEPC_LAPTOP=y and RFKILL=m. eeepc-laptop.c:(.text+0xd5a7b): undefined reference to `rfkill_allocate' eeepc-laptop.c:(.text+0xd5b04): undefined reference to `rfkill_register' eeepc-laptop.c:(.text+0xd5b48): undefined reference to `rfkill_allocate' eeepc-laptop.c:(.text+0xd5bd4): undefined reference to `rfkill_register' eeepc-laptop.c:(.text+0xd5ece): undefined reference to `rfkill_unregister' eeepc-laptop.c:(.text+0xd5ef6): undefined reference to `rfkill_unregister' make[1]: *** [.tmp_vmlinux1] Error 1 Signed-off-by:
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Julia Lawall authored
The kernel.h macro DIV_ROUND_UP performs the computation (((n) + (d) - 1) / (d)) but is perhaps more readable. An extract of the semantic patch that makes this change is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @haskernel@ @@ #include <linux/kernel.h> @depends on haskernel@ expression n,d; @@ ( - (n + d - 1) / d + DIV_ROUND_UP(n,d) | - (n + (d - 1)) / d + DIV_ROUND_UP(n,d) ) @depends on haskernel@ expression n,d; @@ - DIV_ROUND_UP((n),d) + DIV_ROUND_UP(n,d) @depends on haskernel@ expression n,d; @@ - DIV_ROUND_UP(n,(d)) + DIV_ROUND_UP(n,d) // </smpl> Signed-off-by:
Julia Lawall <julia@diku.dk> Cc: Jack Steiner <steiner@sgi.com> Signed-off-by:
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Robert P. J. Day authored
This macro appears to have been unused for ages, and there are no invocations of it anywhere in the source tree. Signed-off-by:
Robert P. J. Day <rpjday@crashcourse.ca> Signed-off-by:
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Adrian Bunk authored
Remove a CVS keyword that wasn't updated for a long time from a comment. Signed-off-by:
Adrian Bunk <bunk@kernel.org> Signed-off-by:
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Adrian Bunk authored
Remove a CVS keyword that wasn't updated for a long time from a comment. Signed-off-by:
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Harvey Harrison authored
__FUNCTION__ is gcc-specific, use __func__ Signed-off-by:
Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by:
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Harvey Harrison authored
__FUNCTION__ is gcc-specific, use __func__ Signed-off-by:
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Harvey Harrison authored
Signed-off-by:
Andres Salomon <dilinger@queued.net> Cc: David Woodhouse <dwmw2@infradead.org> Signed-off-by:
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Adrian Bunk authored
Remove the dead CONFIG_TTY_LOG (no kconfig option). Reported-by:
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Frans Pop authored
As pm_trace uses the system's hardware clock to save its magic value, users of that option should be warned that using this debug option will result in an incorrect system time after resume. Signed-off-by:
Frans Pop <elendil@planet.nl> Acked-by:
Pavel Machek <pavel@suse.cz> Signed-off-by:
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Rafael J. Wysocki authored
We currently use a PM notifier to disable user mode helpers before suspend and hibernation and to re-enable them during resume. However, this is not an ideal solution, because if any drivers want to upload firmware into memory before suspend, they have to use a PM notifier for this purpose and there is no guarantee that the ordering of PM notifiers will be as expected (ie. the notifier that disables user mode helpers has to be run after the driver's notifier used for uploading the firmware). For this reason, it seems better to move the disabling and enabling of user mode helpers to separate functions that will be called by the PM core as necessary. [akpm@linux-foundation.org: remove unneeded ifdefs] Signed-off-by:
Rafael J. Wysocki <rjw@sisk.pl> Cc: Alan Stern <stern@rowland.harvard.edu> Acked-by:
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Alexey Dobriyan authored
arch/alpha/kernel/smp.c:153: error: implicit declaration of function 'notify_cpu_starting' Signed-off-by:
Alexey Dobriyan <adobriyan@gmail.com> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Signed-off-by:
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Adrian Bunk authored
Remove a dead URL. Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by:
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