- 29 Sep, 2006 40 commits
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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:
Roland McGrath <roland@redhat.com> Cc: Oleg Nesterov <oleg@tv-sign.ru> 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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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:
Oleg Nesterov <oleg@tv-sign.ru> Acked-By:
David Howells <dhowells@redhat.com> 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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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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