- 29 Sep, 2006 40 commits
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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:
Oleg Nesterov <oleg@tv-sign.ru> Acked-By:
David Howells <dhowells@redhat.com> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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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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Tobias Klauser authored
Use ARRAY_SIZE macro instead of sizeof(x)/sizeof(x[0]) Signed-off-by:
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Ben Dooks authored
This can now be removed, since there is now a drivers/rtc/rtc-s3c.c driver. Signed-off-by:
Ben Dooks <ben-linux@fluff.org> Signed-off-by:
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Alexey Dobriyan authored
Remove some code which is unneeded if CONFIG_PM=n. * Make suspend/resume registration look like the rest of drivers: #ifdef CONFIG_PM in struct pci_driver, prototypes, actual hooks. * Drop CS46XX_ACPI_SUPPORT. It logically duplicated CONFIG_PM. It was hardcoded to 1 approx forever (ALSA merge just moved driver to sound/oss/). * After previous point, sound/oss/cs46xxpm-24.h removed as being useless. * As side effect selling (unused) static inline functions as suspend/resume hooks funkiness removed too. Signed-off-by:
Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by:
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Alexey Dobriyan authored
Remove some code which is unneeded if CONFIG_PM=n. Signed-off-by:
Muli Ben-Yehuda <muli@il.ibm.com> Signed-off-by:
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Alexey Dobriyan authored
Remove some code which is unneeded if CONFIG_PM=n. Signed-off-by:
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Johannes Berg authored
Make it possible to include linux/leds.h without first including list.h and spinlock.h. Signed-off-by:
Johannes Berg <johannes@sipsolutions.net> Acked-by:
Richard Purdie <rpurdie@rpsys.net> Signed-off-by:
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Dave Jones authored
After the asm/ uses of #include <linux/config.h> this one is the next biggest source of noise. Signed-off-by:
Dave Jones <davej@redhat.com> Signed-off-by:
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Ernie Petrides authored
The problem is that close() syscalls can call a file system's flush handler, which in turn might sleep interruptibly and ultimately pass back an -ERESTARTSYS return value. This happens for files backed by an interruptible NFS mount under nfs_file_flush() when a large file has just been written and nfs_wait_bit_interruptible() detects that there is a signal pending. I have a test case where the "strace" command is used to attach to a process sleeping in such a close(). Since the SIGSTOP is forced onto the victim process (removing it from the thread's "blocked" mask in force_sig_info()), the RPC wait is interrupted and the close() is terminated early. But the file table entry has already been cleared before the flush handler was called. Thus, when the syscall is restarted, the file descriptor appears closed and an EBADF error is returned (which is wrong). What's worse, there is the hypothetical case where another thread of a multi-threaded application might have reused the file descriptor, in which case that file would be mistakenly closed. The bottom line is that close() syscalls are not restartable, and thus -ERESTARTSYS return values should be mapped to -EINTR. This is consistent with the close(2) manual page. The fix is below. Signed-off-by:
Ernie Petrides <petrides@redhat.com> Cc: Roland McGrath <roland@redhat.com> Signed-off-by:
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Jesper Juhl authored
Signed-off-by:
Jesper Juhl <jesper.juhl@gmail.com> Signed-off-by:
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Paul E. McKenney authored
Both __kfifo_put() and __kfifo_get() have header comments stating that if there is but one concurrent reader and one concurrent writer, locking is not necessary. This is almost the case, but a couple of memory barriers are needed. Another option would be to change the header comments to remove the bit about locking not being needed, and to change the those callers who currently don't use locking to add the required locking. The attachment analyzes this approach, but the patch below seems simpler. Signed-off-by:
Paul E. McKenney <paulmck@us.ibm.com> Cc: Stelian Pop <stelian@popies.net> Signed-off-by:
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Dave Jones authored
Lets do the same thing we do for oopses - print out the version in the report. It's an extra line of output though. We could tack it on the end of the INFO: lines, but that screws up Ingo's pretty output. Signed-off-by:
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Anatoli Antonovitch authored
Support SB600 SATA legacy IDE (DMA enable). Signed-off-by:
Anatoli Antonovitch <antonovi@ati.com> Cc: Jeff Garzik <jeff@garzik.org> Acked-by:
Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by:
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Amos Waterland authored
The code in __register_chrdev_region checks that if the driver wishing to register has the same major as an existing driver the new minor range is strictly less than the existing minor range. However, it does not also check that the new minor range is strictly greater than the existing minor range. That is, if driver X has registered with major=x and minor=0-3, __register_chrdev_region will allow driver Y to register with major=x and minor=1-4. Signed-off-by:
Amos Waterland <apw@us.ibm.com> Cc: Linas Vepstas <linas@austin.ibm.com> Signed-off-by:
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Sukadev Bhattiprolu authored
This is an updated version of Eric Biederman's is_init() patch. (http://lkml.org/lkml/2006/2/6/280). It applies cleanly to 2.6.18-rc3 and replaces a few more instances of ->pid == 1 with is_init(). Further, is_init() checks pid and thus removes dependency on Eric's other patches for now. Eric's original description: There are a lot of places in the kernel where we test for init because we give it special properties. Most significantly init must not die. This results in code all over the kernel test ->pid == 1. Introduce is_init to capture this case. With multiple pid spaces for all of the cases affected we are looking for only the first process on the system, not some other process that has pid == 1. Signed-off-by:
Eric W. Biederman <ebiederm@xmission.com> Signed-off-by:
Sukadev Bhattiprolu <sukadev@us.ibm.com> Cc: Dave Hansen <haveblue@us.ibm.com> Cc: Serge Hallyn <serue@us.ibm.com> Cc: Cedric Le Goater <clg@fr.ibm.com> Cc: <lxc-devel@lists.sourceforge.net> Acked-by:
Paul Mackerras <paulus@samba.org> Signed-off-by:
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Eric Biederman authored
This appears to be the only usage of is_init in the kernel besides the usage in sched.h. On ia64 the same function is called in_init. So to remove the conflict and make the kernel more consistent rename is_init is_core is_local and is_local_section to in_init in_core in_local and in_local_section respectively. Thanks to Adrian Bunk who spotted this, and to Matthew Wilcox who suggested this fix. Signed-off-by:
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Kirill Korotaev authored
Fixed race on put_files_struct on exec with proc. Restoring files on current on error path may lead to proc having a pointer to already kfree-d files_struct. ->files changing at exit.c and khtread.c are safe as exit_files() makes all things under lock. Found during OpenVZ stress testing. [akpm@osdl.org: add export] Signed-off-by:
Pavel Emelianov <xemul@openvz.org> Signed-off-by:
Kirill Korotaev <dev@openvz.org> Signed-off-by:
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Serge E. Hallyn authored
Convert i386 apm.c from kernel_thread(), whose export is deprecated, to kthread API. Signed-off-by:
Serge E. Hallyn <serue@us.ibm.com> Signed-off-by:
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Alan Cox authored
The current kernel serializes console resizes but does not serialize the resize against the tty structure updates. This means that while two parallel resizes cannot mess up the console you can get incorrect results reported. Secondly while doing this I added vc_lock_resize() to lock and resize the console. This leaves all knowledge of the console_sem in the vt/console driver and kicks it out of the tty layer, which is good Thirdly while doing this I decided I couldn't stand "disallocate" any longer so I switched it to "deallocate". Signed-off-by:
Alan Cox <alan@redhat.com> Cc: Paul Fulghum <paulkf@microgate.com> Signed-off-by:
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Chris Mason authored
Fat is commonly used on removable media. Mounting with -o flush tells the FS to write things to disk as quickly as possible. It is like -o sync, but much faster (and not as safe). Signed-off-by:
Chris Mason <mason@suse.com> Cc: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by:
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Arun Sharma authored
Need to enable/disable all the counters instead of just counter 0. This affects all cpus with family=6, including i386/core. Usual symptom: only counter 0 provides samples. Other counters don't produce samples. Signed-off-by:
Arun Sharma <arun.sharma@google.com> Cc: Philippe Elie <phil.el@wanadoo.fr> Cc: John Levon <levon@movementarian.org> Signed-off-by:
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Alexey Dobriyan authored
[assuming BSD security levels are deleted] The only user of i_security, f_security, s_security fields is SELinux, however, quite a few security modules are trying to get into kernel. So, wrap them under CONFIG_SECURITY. Adding config option for each security field is likely an overkill. Following Stephen Smalley's suggestion, i_security initialization is moved to security_inode_alloc() to not clutter core code with ifdefs and make alloc_inode() codepath tiny little bit smaller and faster. The user of (highly greppable) struct fown_struct::security field is still to be found. I've checked every "fown_struct" and every "f_owner" occurence. Additionally it's removal doesn't break i386 allmodconfig build. struct inode, struct file, struct super_block, struct fown_struct become smaller. P.S. Combined with two reiserfs inode shrinking patches sent to linux-fsdevel, I can finally suck 12 reiserfs inodes into one page. /proc/slabinfo -ext2_inode_cache 388 10 +ext2_inode_cache 384 10 -inode_cache 280 14 +inode_cache 276 14 -proc_inode_cache 296 13 +proc_inode_cache 292 13 -reiser_inode_cache 336 11 +reiser_inode_cache 332 12 <= -shmem_inode_cache 372 10 +shmem_inode_cache 368 10 Signed-off-by:
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Alexey Dobriyan authored
Shrink reiserfs inode more (by 8 bytes) for ACL non-users: -reiser_inode_cache 344 11 +reiser_inode_cache 336 11 Signed-off-by:
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Alexey Dobriyan authored
Shrink reiserfs inode by 12 bytes for xattr non-users (me). -reiser_inode_cache 356 11 +reiser_inode_cache 344 11 Signed-off-by:
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Chuck Ebbert authored
Fix "variable defined but not used" compiler warning in unwind.c when CONFIG_MODULES is not set. Signed-off-by:
Chuck Ebbert <76306.1226@compuserve.com> Cc: Jan Beulich <jbeulich@novell.com> Cc: Andi Kleen <ak@muc.de> Signed-off-by:
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Alexey Dobriyan authored
All suppliers of ->quota_read, ->quota_write (I've found ext2, ext3, UFS, reiserfs) already have them properly ifdeffed. All callers of ->quota_read, ->quota_write are under CONFIG_QUOTA umbrella, so... Signed-off-by:
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Chris Mason authored
ReiserFS does periodic cleanup of old transactions in order to limit the length of time a journal replay may take after a crash. Sometimes, writing metadata from an old (already committed) transaction may require committing a newer transaction, which also requires writing all data=ordered buffers. This can cause very long stalls on journal_begin. This patch makes sure new transactions will not need to be committed before trying a periodic reclaim of an old transaction. It is low risk because if a bad decision is made, it just means a slightly longer journal replay after a crash. Signed-off-by:
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Chris Mason authored
make sure that reiserfs_fsync only triggers barriers when mounted with -o barrier=flush Signed-off-by:
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Adam Tlalka authored
Fix utf-8 mode so alternate charset modes always work according to control sequences interpreted in do_con_trol function preserving backward US-ASCII and VT100 semigraphics compatibility. Malformed utf-8 sequences are represented as sequences of replacement glyphs,original codes or '?' as a last resort. unicode-xterm, gnome-terminal, kconsole and other terminal emulators in utf-8 mode respect acsc, enacs, rmacs sequences. Also I found that some important system programs (from Debian distro) uses acsc in utf-8 mode - dselect, aptitude, w3m for example. Signed-off-by:
Adam Tlalka <atlka@pg.gda.pl> Acked-by:
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Dmitry Torokhov authored
ucb1x00-ts: handle errors from input_register_device() Signed-off-by:
Dmitry Torokhov <dtor@mail.ru> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Pavel Machek <pavel@ucw.cz> Signed-off-by:
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Dave Jones authored
In cases where we detect a single bit has been flipped, we spew the usual slab corruption message, which users instantly think is a kernel bug. In a lot of cases, single bit errors are down to bad memory, or other hardware failure. This patch adds an extra line to the slab debug messages in those cases, in the hope that users will try memtest before they report a bug. 000: 6b 6b 6b 6b 6a 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b Single bit error detected. Possibly bad RAM. Run memtest86. [akpm@osdl.org: cleanups] Signed-off-by:
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Alexey Dobriyan authored
Just comment and next "while" look _very_ wrong. Place { correctly to hint unsuspecting ones that it's the end of the loop actually. Signed-off-by: -
Chris Wright authored
This code has suffered from broken core design and lack of developer attention. Broken security modules are too dangerous to leave around. It is time to remove this one. Signed-off-by:
Chris Wright <chrisw@sous-sol.org> Acked-by:
Michael Halcrow <mhalcrow@us.ibm.com> Acked-by:
Greg Kroah-Hartman <gregkh@suse.de> Acked-by:
James Morris <jmorris@namei.org> Acked-by:
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Rolf Eike Beer authored
Now that the generic DMA code has a function to decide if a given DMA mapping is valid use it. This will catch cases where direction is not any of the defined enum values but some random number outside the valid range. The current implementation will only catch the defined but invalid case DMA_NONE. Signed-off-by:
Rolf Eike Beer <eike-kernel@sf-tec.de> Acked-by:
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Rolf Eike Beer authored
As suggested by Muli Ben-Yehuda this function is moved to generic code as may be useful for all archs. [akpm@osdl.org: fix] Signed-off-by:
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Alan Cox authored
Jon Smirl noted a couple of tty driver functions now are quite misleadingly named with the death of devfs. A quick grep found another case in the lp driver. Signed-off-by:
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