- 13 Jan, 2011 40 commits
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Andres Salomon authored
This adds (well, re-adds actually) handling for events/IRQs through cs5535 GPIOs. In the wild and wooly world of CS5535, setup_event() is for assigning an IRQ to a GPIO filter/event pair, and set_irq() sets up the pair to trigger IRQs. These should really only be used in highly platform-specific drivers (such as OLPC's DCON driver). Sadly, because set_irq() uses MSRs, this causes the driver to become X86-specific. Signed-off-by:
Andres Salomon <dilinger@queued.net> Signed-off-by:
Daniel Drake <dsd@laptop.org> Cc: Grant Likely <grant.likely@secretlab.ca> Cc: Greg KH <greg@kroah.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Axel Lin authored
Current implementation does not set driver data in max6902_probe(), thus calling platform_get_drvdata(spi) in max6902_remove() returns NULL. Signed-off-by:
Axel Lin <axel.lin@gmail.com> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by:
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Paul Gortmaker authored
People stumble across the entry for the legacy PC specific RTC driver entry in MAINTAINERS when they really want the multi-arch, multi-driver RTC subsystem. So just delete the old entry that is causing the confusion. Signed-off-by:
Paul Gortmaker <paul.gortmaker@windriver.com> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by:
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Paul Fox authored
rtc-cmos was setting suspend/resume hooks at the device_driver level. However, the platform bus code (drivers/base/platform.c) only looks for resume hooks at the dev_pm_ops level, or within the platform_driver. Switch rtc_cmos to use dev_pm_ops so that suspend/resume code is executed again. Paul said: : The user visible symptom in our (XO laptop) case was that rtcwake would : fail to wake the laptop. The RTC alarm would expire, but the wakeup : wasn't unmasked. : : As for severity, the impact may have been reduced because if I recall : correctly, the bug only affected platforms with CONFIG_PNP disabled. Signed-off-by:
Paul Fox <pgf@laptop.org> Signed-off-by:
Rafael J. Wysocki <rjw@sisk.pl> Cc: <stable@kernel.org> [2.6.37.x] Signed-off-by:
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Axel Lin authored
request_mem_region() will call kzalloc to allocate memory for struct resource. release_resource() unregisters the resource but does not free the allocated memory, thus use release_mem_region() instead to fix the memory leak. Also add a missing iounmap() in omap_rtc_remove(). Signed-off-by:
Mark A. Greer <mgreer@mvista.com> Signed-off-by:
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Yannick Heneault authored
It seems there is a small problem of VGA palette corruption on EFI machine. When the kernel initializes the architecture, it checks if the machine is a EFI machine and assumes that a VGA console can exist. When it initializes the console in vgacon_startup it checks if it can really use the VGA console. I think this is where a check is missing. Currently, the function can fail if a VESA boot mode is detected but not if a EFI boot mode was used. Thus vgacon_startup() doesn't fail and initialize the video card for a real VGA mode. This function changes the first 16entries of the VGA palette. When the efifb driver kicks in, the palette is not restored to default ramp value, thus the 16 first entry remain in a modified state. The following patch prevent this corruption. Signed-off-by:
Yannick Heneault <yheneaul@matrox.com> Cc: Dave Airlie <airlied@linux.ie> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by:
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Mikael Pettersson authored
This cleans up a few bits in binfmt_elf.c and binfmts.h: - the hasvdso field in struct linux_binfmt is unused, so remove it and the only initialization of it - the elf_map CPP symbol is not defined anywhere in the kernel, so remove an unnecessary #ifndef elf_map - reduce excessive indentation in elf_format's initializer - add missing spaces, remove extraneous spaces No functional changes, but tested on x86 (32 and 64 bit), powerpc (32 and 64 bit), sparc64, arm, and alpha. Signed-off-by:
Mikael Pettersson <mikpe@it.uu.se> Signed-off-by:
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Robin Holt authored
On a 16TB machine, max_user_watches has an integer overflow. Convert it to use a long and handle the associated fallout. Signed-off-by:
Robin Holt <holt@sgi.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Acked-by:
Davide Libenzi <davidel@xmailserver.org> Cc: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by:
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Vasiliy Kulikov authored
On some architectures __kernel_suseconds_t is int. On these archs struct timeval has padding bytes at the end. This struct is copied to userspace with these padding bytes uninitialized. This leads to leaking of contents of kernel stack memory. This bug was added with v2.6.27-rc5-286-gb773ad40. [akpm@linux-foundation.org: avoid the memset on architectures which don't need it] Signed-off-by:
Vasiliy Kulikov <segooon@gmail.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by:
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Joe Perches authored
There's a __packed #define for __attribute__((packed)). Add a checkpatch to tell people about it. Signed-off-by:
Joe Perches <joe@perches.com> Cc: Andy Whitcroft <apw@shadowen.org> Signed-off-by:
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Dave Jones authored
Exporting world writable sysfs/debugfs files is usually a bad thing. Warn about it. Signed-off-by:
Dave Jones <davej@redhat.com> Cc: Andy Whitcroft <apw@canonical.com> Signed-off-by:
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Florian Mickler authored
We should only claim that something is a cast if we did not encouter a token before, that did set av_pending. This fixes the operator * in the line below to be detected as binary (vs unary). kmalloc(sizeof(struct alphatrack_ocmd) * true_size, GFP_KERNEL); Reported-by:
Audun Hoem <audun.hoem@gmail.com> Signed-off-by:
Florian Mickler <florian@mickler.org> Cc: Andy Whitcroft <apw@shadowen.org> Signed-off-by:
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Joe Perches authored
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David Rientjes authored
Alex said: I want to use flex_array to store a sparse array of ATM cell re-assembly buffers for my ATM over Ethernet driver. Using the per-vcc user_back structure causes problems when stacked with things like br2684. Add EXPORT_SYMBOL() for all publically accessible flex array functions and move to obj-y so that modules may use this library. Signed-off-by:
David Rientjes <rientjes@google.com> Cc: Dave Hansen <dave@linux.vnet.ibm.com> Cc: Paul Mundt <lethal@linux-sh.org> Reported-by:
Alex Bennee <kernel-hacker@bennee.com> Signed-off-by:
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Stelian Pop authored
This driver is PPC only, and I am no longer able to test it. Signed-off-by:
Stelian Pop <stelian@popies.net> Cc: Michael Hanselmann <linux-kernel@hansmi.ch> Signed-off-by:
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Stelian Pop authored
I don't even remember when it was that I sold this laptop, but it has been a few years... Signed-off-by:
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Stelian Pop authored
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Lennert Buytenhek authored
Signed-off-by:
Lennert Buytenhek <buytenh@wantstofly.org> Cc: Florian Fainelli <florian@openwrt.org> Signed-off-by:
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Joe Perches authored
On Fri, 2010-11-05 at 13:50 -0700, Andrew Morton wrote: > z:/usr/src/git26> perl scripts/get_maintainer.pl -file mm/mempolicy.c > linux-mm@kvack.org > linux-kernel@vger.kernel.org Turns out this is an arguable defect in the script. The MAINTAINERS entry for mm is: MEMORY MANAGEMENT L: linux-mm@kvack.org W: http://www.linux-mm.org S: Maintained F: include/linux/mm.h F: mm/ There's a maintainer entry, but no named individual, so the script doesn't use git history via --git-fallback. This is also a defect for MAINTAINERS with status entries marked "Orphan" or "Odd fixes". The script now checks a section for any "M:" entry and that an "S:" entry is supported or maintained. If both those conditions are not satisified, use --git-fallback as appropriate. Signed-off-by:
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Joe Perches authored
This script now requires a user to add --norolestats to the command line so it's harder to feed the output of this script to programs that send mass emails. Update --help to correct command line defaults. Change version to 0.26. Signed-off-by:
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Anton Arapov authored
vscnprintf() should return 0 if @size is == 0. Update the comment for it, as @size is unsigned. This change based on the code of commit b903c0b8 ("lib: fix scnprintf() if @size is == 0") moves the real fix into vscnprinf() from scnprintf() and makes scnprintf() call vscnprintf(), thus avoid code duplication. Signed-off-by:
Anton Arapov <aarapov@redhat.com> Acked-by:
Changli Gao <xiaosuo@gmail.com> Signed-off-by:
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Joe Perches authored
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Joe Perches authored
- Use no_printk for !CONFIG_PRINTK printk_ratelimited. - Whitespace cleanup. Signed-off-by:
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Joe Perches authored
- Move prototypes and align arguments. - Add CONFIG_PRINTK guard for print_hex functions Signed-off-by:
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Joe Perches authored
- Move printk_once definitions and add an #ifdef CONFIG_PRINTK - Add pr_<level>_once so printks can use pr_fmt Signed-off-by:
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Joe Perches authored
- Move no_printk above first CONFIG_PRINTK block so it can be used by printk_once. - Convert statement expression if (0) printk macros to no_printk. - Convert printk_once(x...) to more normally used (fmt, ...) fmt, ##__VA_ARGS__. - Standardize __attribute__ use. - Expand single line inline functions. - Remove space before pointer. Signed-off-by:
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Joe Perches authored
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Joe Perches authored
There are many uses of printk_once(KERN_<level>, so add pr_<level>_once macros to avoid printk_once(KERN_<level> pr_fmt(fmt). Add an #ifdef CONFIG_PRINTK for print_hex_dump and static inline void functions for the #else cases to reduce embedded code size. Neaten and organize the rest of the code. This patch: Move console functions and variables together. Signed-off-by:
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Huang Ying authored
dump_list_lock is used to protect dump_list in kmsg_dumper implementation, kmsg_dump() uses it to traverse dump_list too. But if there is contention on the lock, kmsg_dump() will fail, and the valuable kernel message may be lost. This patch solves this issue with RCU. Because kmsg_dump() only read the list, no lock is needed in kmsg_dump(). So that kmsg_dump() will never fail because of lock contention. Signed-off-by:
Huang Ying <ying.huang@intel.com> Cc: "Paul E. McKenney" <paulmck@us.ibm.com> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by:
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Dan Carpenter authored
The return here doesn't release the locks or re-enable IRQs. But as Andrew Morton points out, domain is never NULL. list_first_entry() essentially never returns NULL and also we already verified that the list is not empty. Signed-off-by:
Dan Carpenter <error27@gmail.com> Acked-by:
Maciej Sosnowski <maciej.sosnowski@intel.com> Cc: David Miller <davem@davemloft.net> Signed-off-by:
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Dan Rosenberg authored
Add the %pK printk format specifier and the /proc/sys/kernel/kptr_restrict sysctl. The %pK format specifier is designed to hide exposed kernel pointers, specifically via /proc interfaces. Exposing these pointers provides an easy target for kernel write vulnerabilities, since they reveal the locations of writable structures containing easily triggerable function pointers. The behavior of %pK depends on the kptr_restrict sysctl. If kptr_restrict is set to 0, no deviation from the standard %p behavior occurs. If kptr_restrict is set to 1, the default, if the current user (intended to be a reader via seq_printf(), etc.) does not have CAP_SYSLOG (currently in the LSM tree), kernel pointers using %pK are printed as 0's. If kptr_restrict is set to 2, kernel pointers using %pK are printed as 0's regardless of privileges. Replacing with 0's was chosen over the default "(null)", which cannot be parsed by userland %p, which expects "(nil)". [akpm@linux-foundation.org: check for IRQ context when !kptr_restrict, save an indent level, s/WARN/WARN_ONCE/] [akpm@linux-foundation.org: coding-style fixup] [randy.dunlap@oracle.com: fix kernel/sysctl.c warning] Signed-off-by:
Dan Rosenberg <drosenberg@vsecurity.com> Signed-off-by:
Randy Dunlap <randy.dunlap@oracle.com> Cc: James Morris <jmorris@namei.org> Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: Thomas Graf <tgraf@infradead.org> Cc: Eugene Teo <eugeneteo@kernel.org> Cc: Kees Cook <kees.cook@canonical.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: David S. Miller <davem@davemloft.net> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Eric Paris <eparis@parisplace.org> Signed-off-by:
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Amerigo Wang authored
For arch which needs USE_GENERIC_SMP_HELPERS, it has to select USE_GENERIC_SMP_HELPERS, rather than leaving a choice to user, since they don't provide their own implementions. Also, move on_each_cpu() to kernel/smp.c, it is strange to put it in kernel/softirq.c. For arch which doesn't use USE_GENERIC_SMP_HELPERS, e.g. blackfin, only on_each_cpu() is compiled. Signed-off-by:
Amerigo Wang <amwang@redhat.com> Cc: David Howells <dhowells@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by:
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Chris Ruffin authored
Fix unusued return value compiler warnings due to unchecked write() calls. [akpm@linux-foundation.org: correctly handle short writes] Signed-off-by:
Chris Ruffin <cmruffin@gmail.com> Cc: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by:
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Shaohua Li authored
The readmostly section should end at a cacheline aligned address, otherwise the last several data might share cachline with other data and make the readmostly data still have cache bounce. For example, in ia64, secpath_cachep is the last readmostly data, and it shares cacheline with init_uts_ns. a000000100e80480 d secpath_cachep a000000100e80488 D init_uts_ns Signed-off-by:
Shaohua Li <shaohua.li@intel.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Eric Dumazet <eric.dumazet@gmail.com> Acked-by:
Tejun Heo <tj@kernel.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by:
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Andrew Morton authored
Cc: Will Newton <will.newton@gmail.com> Signed-off-by:
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Alexander Shishkin authored
Currently, tosh_smm() prototype is present in a header file exported to userland. This patch fixes it. Signed-off-by:
Alexander Shishkin <virtuoso@slind.org> Cc: Jonathan Buzzard <jonathan@buzzard.org.uk> Signed-off-by:
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Andrew Morton authored
Michal reports: In the framebuffer subsystem the abs() macro is often used as a part of the calculation of a Manhattan metric, which in turn is used as a measure of similarity between video modes. The arguments of abs() are sometimes unsigned numbers. This worked fine until commit a49c59c0 ("Make sure the value in abs() does not get truncated if it is greater than 2^32:) , which changed the definition of abs() to prevent truncation. As a result of this change, in the following piece of code: u32 a = 0, b = 1; u32 c = abs(a - b); 'c' will end up with a value of 0xffffffff instead of the expected 0x1. A problem caused by this change and visible by the end user is that framebuffer drivers relying on functions from modedb.c will fail to find high resolution video modes similar to that explicitly requested by the user if an exact match cannot be found (see e.g. Fix this by special-casing `long' types within abs(). This patch reduces x86_64 code size a bit - drivers/video/uvesafb.o shrunk by 15 bytes, presumably because it is doing abs() on 4-byte quantities, and expanding those to 8-byte longs adds code. testcase: #define oldabs(x) ({ \ long __x = (x); \ (__x < 0) ? -__x : __x; \ }) #define newabs(x) ({ \ long ret; \ if (sizeof(x) == sizeof(long)) { \ long __x = (x); \ ret = (__x < 0) ? -__x : __x; \ } else { \ int __x = (x); \ ret = (__x < 0) ? -__x : __x; \ } \ ret; \ }) typedef unsigned int u32; main() { u32 a = 0; u32 b = 1; u32 oldc = oldabs(a - b); u32 newc = newabs(a - b); printf("%u %u\n", oldc, newc); } akpm:/home/akpm> gcc t.c akpm:/home/akpm> ./a.out 4294967295 1 Reported-by:
Michal Januszewski <michalj@gmail.com> Cc: Rolf Eike Beer <eike-kernel@sf-tec.de Cc: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by:
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Stephen Hemminger authored
Occasionally the system gets into a state where the CMOS clock has gotten slightly ahead of current time and the periodic update of RTC fails. The message is a nuisance and repeats spamming the log. See: http://www.ntp.org/ntpfaq/NTP-s-trbl-spec.htm#Q-LINUX-SET-RTC-MMSS Rather than just removing the message, make it show only once and reduce severity since it indicates a normal and non urgent condition. Signed-off-by:
Stephen Hemminger <shemminger@vyatta.com> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Matt Turner <mattst88@gmail.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: David Howells <dhowells@redhat.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by:
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Seiji Aguchi authored
We need to know the reason why system rebooted in support service. However, we can't inform our customers of the reason because final messages are lost on current Linux kernel. This patch improves the situation above because the final messages are saved by adding kmsg_dump() to reboot, halt, poweroff and emergency_restart path. Signed-off-by:
Seiji Aguchi <seiji.aguchi@hds.com> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Marco Stornelli <marco.stornelli@gmail.com> Reviewed-by:
Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Reviewed-by:
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by:
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Seiji Aguchi authored
This series aims to develop logging facility for enterprise use. It is important to save kernel messages reliably on enterprise system because they are helpful for diagnosing system. This series add kmsg_dump() to the paths loosing kernel messages. The use case is the following. [Use case of reboot/poweroff/halt/emergency_restart] My company has often experienced the followings in our support service. - Customer's system suddenly reboots. - Customers ask us to investigate the reason of the reboot. We recognize the fact itself because boot messages remain in /var/log/messages. However, we can't investigate the reason why the system rebooted, because the last messages don't remain. And off course we can't explain the reason. We can solve above problem with this patch as follows. Case1: reboot with command - We can see "Restarting system with command:" or ""Restarting system.". Case2: halt with command - We can see "System halted.". Case3: poweroff with command - We can see " Power down.". Case4: emergency_restart with sysrq. - We can see "Sysrq:" outputted in __handle_sysrq(). Case5: emergency_restart with softdog. - We can see "Initiating system reboot" in watchdog_fire(). So, we can distinguish the reason of reboot, poweroff, halt and emergency_restart. If customer executed reboot command, you may think the customer should know the fact. However, they often claim they don't execute the command when they rebooted system by mistake. No message remains on the current Linux kernel, so we can't show the proof to the customer. This patch improves this situation. This patch: Alters mtdoops and ramoops to perform their actions only for KMSG_DUMP_PANIC, KMSG_DUMP_OOPS and KMSG_DUMP_KEXEC because they would like to log crashes only. Signed-off-by:
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