- 29 Sep, 2006 40 commits
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Josh Triplett authored
spin_trylock_irq and spin_trylock_irqsave use _spin_trylock, which does not use the __cond_lock wrapper annotation and thus does not affect the lock context; change them to use spin_trylock instead, which does use __cond_lock. Signed-off-by:
Josh Triplett <josh@freedesktop.org> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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Josh Triplett authored
The lock annotations used on spinlocks and rwlocks currently use __{acquires,releases}(spinlock_t) and __{acquires,releases}(rwlock_t), respectively. This loses the information of which lock actually got acquired or released, and assumes a different type for the parameter of __acquires and __releases than the rest of the kernel. While the current implementations of __acquires and __releases throw away their argument, this will not always remain the case. Change this to use the lock parameter instead, to preserve this information and increase consistency in usage of __acquires and __releases. Signed-off-by: -
Alexey Dobriyan authored
Signed-off-by:
Alexey Dobriyan <adobriyan@gmail.com> Acked-by:
Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by:
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Alan Cox authored
If your driver implements "break on" and "break off" this ensures you won't get multiple overlapping requests or requests in parallel. If your driver has its own break handling then its still your problem as the driver author. Break is also now serialized against writes from user space properly but no new guarantees are made driver level about writes from the line discipline itself (eg flow control or echo) Signed-off-by:
Alan Cox <alan@redhat.com> Signed-off-by:
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Alan Cox authored
[akpm@osdl.org: build fix] [akpm@osdl.org: warning fix] Signed-off-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
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Henrik Kretzschmar authored
Adds a missing exit, if the file that should be parsed couldn't be opened. Without it crashes with a segfault, cause the filedescriptor is accessed even if the file could not be opened. Signed-off-by:
Henrik Kretzschmar <henne@nachtwindheim.de> Acked-by:
Randy Dunlap <rdunlap@xenotime.net> Signed-off-by:
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Oleg Nesterov authored
use rcu locks for find_task_by_pid(). Signed-off-by:
Oleg Nesterov <oleg@tv-sign.ru> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by:
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Oleg Nesterov authored
It is ok to do find_task_by_pid() + get_task_struct() under rcu_read_lock(), we cand drop tasklist_lock. Note that testing of ->exit_state is racy with or without tasklist anyway. Signed-off-by:
Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by:
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Ian Kent authored
During testing I've found that the mount pending flag can be left set at exit from autofs4_lookup after a failed mount request. This shouldn't be allowed to happen and causes incorrect error returns. Signed-off-by:
Ian Kent <raven@themaw.net> Signed-off-by:
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Ian Kent authored
The check for an empty directory in the autofs4_follow_link method fails occassionally due to old dentrys. We had the same problem autofs4_revalidate ages ago. I thought we wouldn't need this in autofs4_follow_link, silly me. Signed-off-by:
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Oleg Nesterov authored
copy_process: // holds tasklist_lock + ->siglock /* * inherit ioprio */ p->ioprio = current->ioprio; Why? ->ioprio was already copied in dup_task_struct(). I guess this is needed to ensure that the child can't escape sys_ioprio_set(IOPRIO_WHO_{PGRP,USER}), yes? In that case we don't need ->siglock held, and the comment should be updated. Signed-off-by: -
Oleg Nesterov authored
Remove open-coded has_rt_policy(), no changes in kernel/exit.o Signed-off-by:
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Oleg Nesterov authored
I am not sure this patch is correct: I can't understand what the current code does, and I don't know what it was supposed to do. The comment says: * can't change policy, except between SCHED_NORMAL * and SCHED_BATCH: The code: if (((policy != SCHED_NORMAL && p->policy != SCHED_BATCH) && (policy != SCHED_BATCH && p->policy != SCHED_NORMAL)) && But this is equivalent to: if ( (is_rt_policy(policy) && has_rt_policy(p)) && which means something different. We can't _decrease_ the current ->rt_priority with such a check (if rlim[RLIMIT_RTPRIO] == 0). Probably, it was supposed to be: if ( !(policy == SCHED_NORMAL && p->policy == SCHED_BATCH) && !(policy == SCHED_BATCH && p->policy == SCHED_NORMAL) this matches the comment, but strange: it doesn't allow to _drop_ the realtime priority when rlim[RLIMIT_RTPRIO] == 0. I think the right check would be: /* can't set/change rt policy */ if (is_rt_policy(policy) && policy != p->policy && !rlim_rtprio) return -EPERM; Signed-off-by:
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Oleg Nesterov authored
Imho, makes the code a bit easier to read. Signed-off-by:
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Oleg Nesterov authored
Use rcu locks instead. sched_setscheduler() now takes ->siglock before reading ->signal->rlim[]. Signed-off-by:
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Cal Peake authored
Get rid of an extraneous printk in kernel_restart(). Signed-off-by:
Cal Peake <cp@absolutedigital.net> Acked-by:
Eric W. Biederman <ebiederm@xmission.com> Signed-off-by:
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Björn Steinbrink authored
If ____call_usermodehelper fails, we're not interested in the child process' exit value, but the real error, so let's stop wait_for_helper from overwriting it in that case. Issue discovered by Benedikt Böhm while working on a Linux-VServer usermode helper. Signed-off-by:
Björn Steinbrink <B.Steinbrink@gmx.de> Cc: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by:
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Rolf Eike Beer authored
Currently this module just returns 1 if anything on module init fails. Store the error code of the different function calls and return their error on problems. Signed-off-by:
Rolf Eike Beer <eike-kernel@sf-tec.de> Cc: Greg KH <greg@kroah.com> Signed-off-by:
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Roland McGrath authored
It is sure confusing that linux/ptrace.h has: #define PTRACE_SINGLESTEP 9 #define PTRACE_ATTACH 0x10 #define PTRACE_DETACH 0x11 #define PTRACE_SYSCALL 24 All the low-numbered constants are in decimal, but the last two in hex. It sure makes it likely that someone will look at this and think that 9, 10, 11 are used, and that 16 and 17 are not used. How about we use the same notation for all the numbers [0,24] in the same short list? Signed-off-by:
Roland McGrath <roland@redhat.com> Signed-off-by:
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Jonathan Corbet authored
Add some documentation comments for the cdev interface. Signed-off-by:
Jonathan Corbet <corbet@lwn.net> Cc: Rolf Eike Beer <eike-kernel@sf-tec.de> Acked-by:
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Arjan van de Ven authored
[akpm@osdl.org: fix] Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Arjan van de Ven <arjan@infradead.org> Signed-off-by:
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Alan Cox authored
If we are going to BUG() not panic() here then we should cover the case of the BUG being compiled out Signed-off-by:
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Alan Cox authored
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Alan Cox authored
Now we lock the set ioctl its trivial to lock the get one so the data copied is consistent. At the moment we have the BKL here but this removes the need for it and is a step in the right direction Signed-off-by:
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Alan Cox authored
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Roland McGrath authored
This fixes a couple of compiler warnings, and adds paranoia checks as well. Signed-off-by:
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Atsushi Nemoto authored
Pass ticks to do_timer() and update_times(), and adjust x86_64 and s390 timer interrupt handler with this change. Currently update_times() calculates ticks by "jiffies - wall_jiffies", but callers of do_timer() should know how many ticks to update. Passing ticks get rid of this redundant calculation. Also there are another redundancy pointed out by Martin Schwidefsky. This cleanup make a barrier added by 5aee405c needless. So this patch removes it. As a bonus, this cleanup make wall_jiffies can be removed easily, since now wall_jiffies is always synced with jiffies. (This patch does not really remove wall_jiffies. It would be another cleanup patch) Signed-off-by:
Atsushi Nemoto <anemo@mba.ocn.ne.jp> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: john stultz <johnstul@us.ibm.com> Cc: Andi Kleen <ak@muc.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Acked-by:
Russell King <rmk@arm.linux.org.uk> Cc: Ian Molton <spyro@f2s.com> Cc: Mikael Starvik <starvik@axis.com> Acked-by:
David Howells <dhowells@redhat.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Hirokazu Takata <takata.hirokazu@renesas.com> Acked-by:
Ralf Baechle <ralf@linux-mips.org> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Kazumoto Kojima <kkojima@rr.iij4u.or.jp> Cc: Richard Curnow <rc@rc0.org.uk> Cc: William Lee Irwin III <wli@holomorphy.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Miles Bader <uclinux-v850@lsi.nec.co.jp> Cc: Chris Zankel <chris@zankel.net> Acked-by:
"Luck, Tony" <tony.luck@intel.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Roman Zippel <zippel@linux-m68k.org> Signed-off-by:
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Roland McGrath authored
This tightens up __dequeue_signal a little. It also avoids doing recalc_sigpending twice in a row, instead doing it once in dequeue_signal. Signed-off-by:
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Roland McGrath authored
This check has been obsolete since the introduction of TASK_TRACED. Now TASK_STOPPED always means job control stop. Signed-off-by:
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Joel & Rebecca VanderZee authored
There was an I/O error that prevented reading the last partial block of large files in an ISO9660 filesystem. The error was generated when a file comprised more than one section and had a size that was not an exact multiple of the filesystem block size. This patch removes the check (and failure) for reading into the last partial block (and possibly beyond) for multiple-section files. It worked in my testing to prevent reading beyond the end of the section; my first patch just incremented the sect_size block count for a partial block and continued doing the check. But there is a commment in the source code about reading beyond the end of the file to fill a page cache. Failing to access beyond the section would prevent reading beyond the end of the file. Signed-off-by:
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Toyo Abe authored
When a posix_cpu_nsleep() sleep is interrupted by a signal more than twice, it incorrectly reports the sleep time remaining to the user. Because posix_cpu_nsleep() doesn't report back to the user when it's called from restart function due to the wrong flags handling. This patch, which applies after previous one, moves the nanosleep() function from posix_cpu_nsleep() to do_cpu_nanosleep() and cleans up the flags handling appropriately. Signed-off-by:
Toyo Abe <toyoa@mvista.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: Roland McGrath <roland@redhat.com> Signed-off-by:
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Toyo Abe authored
The clock_nanosleep() function does not return the time remaining when the sleep is interrupted by a signal. This patch creates a new call out, compat_clock_nanosleep_restart(), which handles returning the remaining time after a sleep is interrupted. This patch revives clock_nanosleep_restart(). It is now accessed via the new call out. The compat_clock_nanosleep_restart() is used for compatibility access. Since this is implemented in compatibility mode the normal path is virtually unaffected - no real performance impact. Signed-off-by:
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jens m. noedler authored
Signed-off-by:
jens m. noedler <noedler@web.de> Signed-off-by:
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Jan Kara authored
Dquot passes the tty to tty_write_message without locking Signed-off-by:
Jan Kara <jack@suse.cz> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by:
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Catalin Marinas authored
Memory leaks can happen in the vc_resize() function in drivers/char/vt.c because of the vc->vc_screenbuf variable overriding in vc_allocate(). The kmemleak reported trace is as follows: <__kmalloc> <vc_resize> <fbcon_init> <visual_init> <vc_allocate> <con_open> <tty_open> <chrdev_open> This patch no longer allocates a screen buffer in vc_allocate() if it was already allocated by vc_resize(). Signed-off-by:
Catalin Marinas <catalin.marinas@arm.com> Acked-by:
"Antonino A. Daplas" <adaplas@pol.net> Signed-off-by:
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Oleg Nesterov authored
do_each_thread() is rcu-safe, and all tasks which use this ->mm must sleep in wait_for_completion(&mm->core_done) at this point, so we can use RCU locks. Also, remove unneeded INIT_LIST_HEAD(new) before list_add(new, head). Signed-off-by:
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Oleg Nesterov authored
do_each_thread() is rcu-safe, and all tasks which use this ->mm must sleep in wait_for_completion(&mm->core_done) at this point, so we can use RCU locks. Also, remove unneeded INIT_LIST_HEAD(new) before list_add(new, head). Signed-off-by:
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Peter Korsgaard authored
Fix the Kconfig entry for console on AMBA PL011 to match the code. Signed-off-by:
Peter Korsgaard <jacmet@sunsite.dk> Signed-off-by:
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Akinobu Mita authored
Spawing ksoftirqd, migration, or watchdog, and calling init_timers_cpu() may fail with small memory. If it happens in initcalls, kernel NULL pointer dereference happens later. This patch makes crash happen immediately in such cases. It seems a bit better than getting kernel NULL pointer dereference later. Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by:
Akinobu Mita <mita@miraclelinux.com> Signed-off-by:
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Tobias Klauser authored
Use ARRAY_SIZE macro instead of sizeof(x)/sizeof(x[0]) Signed-off-by:
Tobias Klauser <tklauser@distanz.ch> Signed-off-by:
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