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2008-02-06atmel_spi throughput improvementHaavard Skinnemoen
Don't insert (undesirable) delays between consecutive words (DLYBCT) or when activating chipselects (DLYBS). Removing the between-word delays improves the performance of bulk transfers (such as mtd_dataflash, m25p80, mmc_spi) significantly. In one test, the improvement was a factor of more than eight! (The large DLYBCT value came from the legacy at91 SPI driver, and it's not clear why it used such a huge value.) Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06spi core: stop updating dev->power.power_stateDavid Brownell
Don't update dev->power.power_state any more in the SPI core. The only reason to update this scheduled-to-be-removed field was to make the already-removed /sys/devices/.../power/state files work better. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06Atari floppy: Rename disk_type to atari_disk_typeGeert Uytterhoeven
Commit edfaa7c36574f1bf09c65ad602412db9da5f96bf Driver core: convert block from raw kobjects to core devices This moves the block devices to /sys/class/block. It will create a flat list of all block devices, with the disks and partitions in one directory. For compatibility /sys/block is created and contains symlinks to the disks. introduced a global disk_type variable in <linux/genhd.h>, causing the following compile error on Atari: drivers/block/ataflop.c:93: error: conflicting types for 'disk_type' include/linux/genhd.h:21: error: previous declaration of 'disk_type' was here Rename the local disk_type variable in drivers/block/ataflop.c to atari_disk_type, to avoid the conflict. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Kay Sievers <kay.sievers@vrfy.org> Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06W1: w1_therm.c standardize units to millidegrees CDavid Fries
Standardize the temperature units to millidegrees C for the two sensor conversion routines. Previously the routines were, w1_DS18B20_convert_temp degrees C w1_DS18S20_convert_temp millidegrees C Unfortunately this will break any program using the ds18b20 value as it will now be 1000 times bigger. Fortunately there can't be that many users out there, or some of these bugs will have been fixed by now, such as the negative C error (see previous patch) that makes me think the ds18b20 is the better choice to change because of the current bugs. Signed-off-by: David Fries <david@fries.net> Cc: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06drivers/cdrom/cdrom.c: simplify logic in cdrom_release()Borislav Petkov
Simplify logic in cdrom_release() without semantic change. Signed-off-by: Borislav Petkov <bbpetkov@yahoo.de> Cc: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06w1: remove unused and confusing variable.Evgeniy Polyakov
Remvoe variable which actually is not used (except assigning it a value) and confusing break out of the family checking loop. Found by Harry Mason. Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Cc: Harry J Mason <hjm03r@ecs.soton.ac.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06tpm: infineon section mismatchRandy Dunlap
Fix section mismatch by making the driver template variable name match one of the whitelisted variable names in modpost. WARNING: vmlinux.o(.data+0x7a9e8): Section mismatch: reference to .init.text:tpm_inf_pnp_probe (between 'tpm_inf_pnp' and 'cn_idx') Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Cc: Marcel Selhorst <tpm@selhorst.net> Acked-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06speed up jiffies conversion functions if HZ==USER_HZAndrew Morton
Avoid calling do_div(x, 1) in this case. Cc: David Fries <david@fries.net> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06system timer: fix crash in <100Hz system timerDavid Fries
The kernel has a divide by zero crash when trying to run the system timer less than 100Hz. The problem is x/(HZ/USER_HZ) and related. Now x*(USER_HZ/HZ) will be used if HZ<USER_HZ. I'm running the Linux kernel under qemu and went to run a slower system timer to take less CPU (and battery) on the host. I found that the kernel paniced under emulation because of a divide by zero in three places. Here is the patch. The base git was updated today 01-05-2008. I went for a 20Hz system time by adding config HZ_20 etc to kernel/Kconfig.hz. With this patch I verified the system timer by looking at /proc/interrupts. [akpm@linux-foundation.org: partially clean up the macro maze] Signed-off-by: David Fries <david@fries.net> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06phantom: don't grab other devicesJiri Slaby
Specify also sub pci ids to not grab devices with properly set sub ids. This devices has these set (unset) to the same as (plx 9050) ids. Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Cc: Andreas Block <andreas.block@esd-electronics.com> Cc: Oliver Thimm <oliver.thimm@esd-electronics.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06Claim maintainership for block2mtd and update email addressesJoern Engel
I have been prime author and maintainer of block2mtd from day one, but neither MAINTAINERS nor the module source makes this fact clear. And while I'm at it, update my email addresses tree-wide, as the old address currently bounces and change my name to "joern" as unicode will likely continue to cause trouble until the end of this century. Signed-off-by: Joern Engel <joern@lazybastard.org> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Andy Whitcroft <apw@shadowen.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06Documentation: add hint about call traces & module symbols to BUG-HUNTINGRichard Kennedy
Here's a couple of small additions to BUG-HUNTING. 1. point out that you can list code in gdb with only one command (gdb) l *(<symbol> + offset) 2. give a very brief hint how to decode module symbols in call traces Signed-off-by: Richard Kennedy <richard@rsk.demon.co.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06make sys_poll() wait at least timeout msKarsten Wiese
schedule_timeout(jiffies) waits for at least jiffies - 1. Add 1 jiffie to the timeout_jiffies calculated in sys_poll() to wait at least timeout_msecs, like poll() manpage says. Signed-off-by: Karsten Wiese <fzu@wemgehoertderstaat.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06Fix IXANY and restart after signal (e.g. ctrl-C) in n_tty line disciplineJoe Peterson
Fix two N_TTY line discipline issues related to resuming a stopped TTY (typically done with ctrl-S): 1) Fix handling of character that resumes a stopped TTY (with IXANY) With "stty ixany", the TTY line discipline would lose the first character after the stop, so typing, for example, "hi^Sthere" resulted in "hihere" (the 't' would cause the resume after ^S, but it would then be thrown away rather than processed as an input character). This was inconsistent with the behavior of other Unix systems. 2) Fix interrupt signal (e.g. ctrl-C) behavior in stopped TTYs With "stty -ixany" (often the default), interrupt signals were ignored in a stopped TTY until the TTY was resumed with the start char (typically ctrl-Q), which was inconsistent with the behavior of other Unix systems. Signed-off-by: Joe Peterson <joe@skyrush.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06docs: convert kref semaphore to mutexDaniel Walker
Just converting this documentation semaphore reference, since we don't want to promote semaphore usage. Signed-off-by: Daniel Walker <dwalker@mvista.com> Acked-by: Corey Minyard <minyard@acm.org> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06Use ilog2() in fs/namespace.cEric Dumazet
We can use ilog2() in fs/namespace.c to compute hash_bits and hash_mask at compile time, not runtime. [akpm@linux-foundation.org: clean it all up] Signed-off-by: Eric Dumazet <dada1@cosmosbay.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06debug_smp_processor_id() fixletsAndrew Morton
- Account for debug_smp_processor_id()'s own preempt_disable() when displaying the preempt_count(). - 80 cols, not 800. Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06kernel/sys.c: get rid of expensive divides in groups_sort()Eric Dumazet
groups_sort() can be quite long if user loads a large gid table. This is because GROUP_AT(group_info, some_integer) uses an integer divide. So having to do XXX thousand divides during one syscall can lead to very high latencies. (NGROUPS_MAX=65536) In the past (25 Mar 2006), an analog problem was found in groups_search() (commit d74beb9f33a5f16d2965f11b275e401f225c949d ) and at that time I changed some variables to unsigned int. I believe that a more generic fix is to make sure NGROUPS_PER_BLOCK is unsigned. Signed-off-by: Eric Dumazet <dada1@cosmosbay.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06idle_regs() must be __cpuinitAdrian Bunk
Fix the following section mismatch with CONFIG_HOTPLUG=n, CONFIG_HOTPLUG_CPU=y: WARNING: vmlinux.o(.text+0x399a6): Section mismatch: reference to .init.text.5:idle_regs (between 'fork_idle' and 'get_task_mm') Signed-off-by: Adrian Bunk <bunk@kernel.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "Luck, Tony" <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06calibrate_delay() must be __cpuinitAdrian Bunk
calibrate_delay() must be __cpuinit, not __{dev,}init. I've verified that this is correct for all users. While doing the latter, I also did the following cleanups: - remove pointless additional prototypes in C files - ensure all users #include <linux/delay.h> This fixes the following section mismatches with CONFIG_HOTPLUG=n, CONFIG_HOTPLUG_CPU=y: WARNING: vmlinux.o(.text+0x1128d): Section mismatch: reference to .init.text.1:calibrate_delay (between 'check_cx686_slop' and 'set_cx86_reorder') WARNING: vmlinux.o(.text+0x25102): Section mismatch: reference to .init.text.1:calibrate_delay (between 'smp_callin' and 'cpu_coregroup_map') Signed-off-by: Adrian Bunk <bunk@kernel.org> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Richard Henderson <rth@twiddle.net> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: Christian Zankel <chris@zankel.net> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06kernel/params.c: remove sparse-warning (different signedness)Richard Knutsson
Fixing: CHECK kernel/params.c kernel/params.c:329:41: warning: incorrect type in argument 8 (different signedness) kernel/params.c:329:41: expected int *num kernel/params.c:329:41: got unsigned int * Signed-off-by: Richard Knutsson <ricknu-0@student.ltu.se> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06lib/extable.c: remove an expensive integer divide in search_extable()Eric Dumazet
Actual code let compiler generates idiv instruction on x86. Using a right shift is OK here and readable as well. Before patch 10: 57 push %edi 11: 56 push %esi 12: 89 d6 mov %edx,%esi 14: 53 push %ebx 15: 89 c3 mov %eax,%ebx 17: eb 22 jmp 3b <search_extable+0x2b> 19: 89 f0 mov %esi,%eax 1b: ba 02 00 00 00 mov $0x2,%edx 20: 29 d8 sub %ebx,%eax 22: 89 d7 mov %edx,%edi 24: c1 f8 03 sar $0x3,%eax 27: 99 cltd 28: f7 ff idiv %edi 2a: 8d 04 c3 lea (%ebx,%eax,8),%eax 2d: 39 08 cmp %ecx,(%eax) ... After patch 00000010 <search_extable>: 10: 53 push %ebx 11: 89 c3 mov %eax,%ebx 13: eb 18 jmp 2d <search_extable+0x1d> 15: 89 d0 mov %edx,%eax 17: 29 d8 sub %ebx,%eax 19: c1 f8 04 sar $0x4,%eax 1c: 8d 04 c3 lea (%ebx,%eax,8),%eax 1f: 39 08 cmp %ecx,(%eax) ... Signed-off-by: Eric Dumazet <dada1@cosmosbay.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06parport_pc: detection for SuperIO IT87XX POSTPetr Cvek
Add detection for IT87XX SuperIO chip and disabling its POST feature, which made noise on parallel port's pins. Signed-off-by: Petr Cvek <petr.cvek@tul.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06ik8: add Dell UK 6400 Inspiron model (MM061)Nick Warne
Add the Dell UK 6400 Inspiron model (MM061) to allow the i8k module to load correctly without using 'force=1' Signed-off-by: "Nick Warne" <nick@ukfsn.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06partition: use DEFAULT_SGI_PARTITION for SGI_PARTION defaultThomas Bogendoerfer
Use DEFAULT_SGI_PARTITION for SGI_PARTION default Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06parport_serial: netmos 9855 fixChristian Pellegrin
Fix wrong netmos 9855 serial port configuration. On loading only one serial port was present and it wasn't working. After looking in the data sheet I realized that the base address was wrong. For further reference here is lspci and relevant dmesg output: 02:00.0 Communication controller: NetMos Technology PCI 9855 Multi-I/O Controller (rev 01) (prog-if 02) Subsystem: LSI Logic / Symbios Logic Unknown device 0022 Flags: medium devsel, IRQ 19 I/O ports at df00 [size=8] I/O ports at de00 [size=8] I/O ports at dd00 [size=8] I/O ports at dc00 [size=8] I/O ports at db00 [size=8] I/O ports at da00 [size=16] parport1: PC-style at 0xdd00 [PCSPP,TRISTATE] parport2: PC-style at 0xdf00 [PCSPP,TRISTATE,EPP] 0000:02:00.0: ttyS0 at I/O 0xdb00 (irq = 19) is a 16550A 0000:02:00.0: ttyS1 at I/O 0xda00 (irq = 19) is a 16550A Signed-off-by: Christian Pellegrin <chripell@fsfe.org> Cc: Thomas Richter <thor@math.TU-Berlin.DE> Cc: Bjorn Helgaas <bjorn.helgaas@hp.com> Cc: Martin Schitter <ms@gewi.kfunigraz.ac.at> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06parport: add support for the Quatech SPPXP-100 Parallel port PCI ExpressCardLuís P Mendes
Added pci device id for the Quatech SPPXP-100 ExpressCard - 0x278 - to include/linux/pci_id.h Modified drivers/parport/parport_pc.c to support the Quatech SPPXP-100 Parallel port PCI ExpressCard [akpm@linux-foundation.org: build fix] Signed-off-by: Luís P Mendes <luis.p.mendes@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06ext2: xip check fixNick Piggin
ext2 should not worry about checking sb->s_blocksize for XIP before the sb's blocksize actually gets set. Signed-off-by: Nick Piggin <npiggin@suse.de> Acked-by: Carsten Otte <cotte@de.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06Amiga serial driver: port_write_mutex fixupDaniel Walker
The port_write_mutex was converted from a semaphore to a mutex, but there was still this ifdef'd init_MUTEX reference remaining. Signed-off-by: Daniel Walker <dwalker@mvista.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06stopmachine: semaphore to mutexDaniel Walker
[akpm@linux-foundation.org: cleanup] Signed-off-by: Daniel Walker <dwalker@mvista.com> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06fs/reiserfs/xattr.c: use LIST_HEAD instead of LIST_HEAD_INITDenis Cheng
Signed-off-by: Denis Cheng <crquan@gmail.com> Cc: Chris Mason <chris.mason@oracle.com> Cc: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06drivers/char/ipmi/ipmi_msghandler.c: use LIST_HEAD instead of LIST_HEAD_INITDenis Cheng
Signed-off-by: Denis Cheng <crquan@gmail.com> Cc: Corey Minyard <minyard@acm.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06docs: kernel-locking: Convert semaphore referencesDaniel Walker
I converted some of the document to reflect mutex usage instead of semaphore usage. Since we shouldin't be promoting semaphore usage when it's on it's way out.. Signed-off-by: Daniel Walker <dwalker@mvista.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06tty: enable the echoing of ^C in the N_TTY disciplineJoe Peterson
Turn on INTR/QUIT/SUSP echoing in the N_TTY line discipline (e.g. ctrl-C will appear as "^C" if stty echoctl is set and ctrl-C is set as INTR). Linux seems to be the only unix-like OS (recently I've verified this on Solaris, BSD, and Mac OS X) that does *not* behave this way, and I really miss this as a good visual confirmation of the interrupt of a program in the console or xterm. I remember this fondly from many Unixs I've used over the years as well. Bringing this to Linux also seems like a good way to make it yet more compliant with standard unix-like behavior. [akpm@linux-foundation.org: coding-style fixes] Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06Add arch_ptrace_stopRoland McGrath
This adds support to allow asm/ptrace.h to define two new macros, arch_ptrace_stop_needed and arch_ptrace_stop. These control special machine-specific actions to be done before a ptrace stop. The new code compiles away to nothing when the new macros are not defined. This is the case on all machines to begin with. On ia64, these macros will be defined to solve the long-standing issue of ptrace vs register backing store. Signed-off-by: Roland McGrath <roland@redhat.com> Cc: Petr Tesarik <ptesarik@suse.cz> Cc: Tony Luck <tony.luck@intel.com> Cc: Matthew Wilcox <willy@debian.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06quota: improve inode list scanning in add_dquot_ref()Jan Kara
We restarted scan of sb->s_inodes list whenever we had to drop inode_lock in add_dquot_ref(). This leads to overall quadratic running time and thus add_dquot_ref() can take several minutes when called on a life filesystem. We fix the problem by using the fact that inode cannot be removed from s_inodes list while we hold a reference to it and thus we can safely restart the scan if we don't drop the reference. Here we use the fact that inodes freshly added to s_inodes list are already guaranteed to have quotas properly initialized and the ordering of inodes on s_inodes list does not change so we cannot skip any inode. Thanks goes to Nick <gentuu@gmail.com> for analyzing the problem and testing the fix. [akpm@linux-foundation.org: iput(NULL) is legal] Signed-off-by: Jan Kara <jack@suse.cz> Cc: Nick <gentuu@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06drivers/char: use LIST_HEAD instead of LIST_HEAD_INITDenis Cheng
single list_head variable initialized with LIST_HEAD_INIT could almost always can be replaced with LIST_HEAD declaration, this shrinks the code and looks better. Signed-off-by: Denis Cheng <crquan@gmail.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Corey Minyard <minyard@acm.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06uio: nopageNick Piggin
Convert uio from nopage to fault. Signed-off-by: Nick Piggin <npiggin@suse.de> Acked-by: Hans J Koch <hjk@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06relay: nopageNick Piggin
Convert relay from nopage to fault. Remove redundant vma range checks. Switch from OOM to SIGBUS if the resource is not available. Signed-off-by: Nick Piggin <npiggin@suse.de> Cc: Tom Zanussi <zanussi@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06kallsyms should prefer non weak symbolsPaulo Marques
When resolving symbol names from addresses with aliased symbol names, kallsyms_lookup always returns the first symbol, even if it is a weak symbol. This patch changes this by sorting the symbols with the weak symbols last before feeding them to the kernel. This way the kernel runtime isn't changed at all, only the kallsyms build system is changed. Another side effect is that the symbols get sorted by address, too. So, even if future binutils version have some bug in "nm" that makes it fail to correctly sort symbols by address, the kernel won't be affected by this. Mathieu says: I created a module in LTTng that uses kallsyms to get the symbol corresponding to a specific system call address. Unfortunately, all the unimplemented syscalls were all referring to the (same) weak symbol identifying an unrelated system call rather that sys_ni (or whatever non-weak symbol would be expected). Kallsyms was dumbly returning the first symbol that matched. This patch makes sure kallsyms returns the non-weak symbol when there is one, which seems to be the expected result. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Looks-great-to: Rusty Russell <rusty@rustcorp.com.au> Cc: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06unix98 allocated_ptys_lock semaphore to mutexDaniel Walker
Convert the unix98 allocated_ptys_lock to a mutex. Signed-off-by: Daniel Walker <dwalker@mvista.com> Acked-by: Ingo Molnar <mingo@elte.hu> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06drivers/isdn/i4l/isdn_tty.c: remove write_semDaniel Walker
I couldn't find any users, so removing it.. Signed-off-by: Daniel Walker <dwalker@mvista.com> Cc: Karsten Keil <kkeil@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06drivers/char/tty_io.c: remove pty_semDaniel Walker
I couldn't find any users, so removing it.. Signed-off-by: Daniel Walker <dwalker@mvista.com> Acked-by: Alan Cox <alan@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06Documentation about unaligned memory accessDaniel Drake
Here's a document I wrote after figuring out what unaligned memory access is all about. I've tried to cover the information I was looking for when trying to learn about this, without producing a hopelessly detailed/complex spew. I hope it is useful to others. Signed-off-by: Daniel Drake <dsd@gentoo.org> Cc: Rob Landley <rob@landley.net> Cc: "Randy.Dunlap" <rdunlap@xenotime.net> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Jan Engelhardt <jengelh@computergmbh.de> Cc: Johannes Berg <johannes@sipsolutions.net> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Kyle Moffett <mrmacman_g4@mac.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06inotify: remove debug codeNick Piggin
The inotify debugging code is supposed to verify that the DCACHE_INOTIFY_PARENT_WATCHED scalability optimisation does not result in notifications getting lost nor extra needless locking generated. Unfortunately there are also some races in the debugging code. And it isn't very good at finding problems anyway. So remove it for now. Signed-off-by: Nick Piggin <npiggin@suse.de> Cc: Robert Love <rlove@google.com> Cc: John McCutchan <ttb@tentacle.dhs.org> Cc: Jan Kara <jack@ucw.cz> Cc: Yan Zheng <yanzheng@21cn.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06inotify: fix raceNick Piggin
There is a race between setting an inode's children's "parent watched" flag when placing the first watch on a parent, and instantiating new children of that parent: a child could miss having its flags set by set_dentry_child_flags, but then inotify_d_instantiate might still see !inotify_inode_watched. The solution is to set_dentry_child_flags after adding the watch. Locking is taken care of, because both set_dentry_child_flags and inotify_d_instantiate hold dcache_lock and child->d_locks. Signed-off-by: Nick Piggin <npiggin@suse.de> Cc: Robert Love <rlove@google.com> Cc: John McCutchan <ttb@tentacle.dhs.org> Cc: Jan Kara <jack@ucw.cz> Cc: Yan Zheng <yanzheng@21cn.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06SC26XX: New serial driver for SC2681 uartsThomas Bogendoerfer
New serial driver for SC2681/SC2691 uarts. Older SNI RM400 machines are using these chips for onboard serial ports. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Torben Mathiasen <device@lanana.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06char: use SGI_HAS_DS1286 for SGI_DS1286 dependsThomas Bogendoerfer
Use SGI_HAS_DS1286 for SGI_DS1286 depends Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06serial: use SGI_HAS_ZILOG for IP22_ZILOG dependsThomas Bogendoerfer
- Use SGI_HAS_ZILOG for IP22_ZILOG depends - remove IP22 from description, because the driver works on more than IP22 SGI machines Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-06Remove superfluous checks for CONFIG_BLK_DEV_INITRD from initramfs.cRobert P. J. Day
Given that init/Makefile includes initramfs.c in the build only if CONFIG_BLK_DEV_INITRD is defined, there seems to be no point checking for it yet again. Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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