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2009-01-05rcu: fix rcutorture bugPaul E. McKenney
Fix an rcutorture bug that prevents the shutdown notifier from ever actually having any effect, due to the fact that kthreads ignore all signals. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-01-05[MTD] [NAND] pxa3xx: convert from ns to clock ticks more accuratelyMatt Reimer
The various fields in NDTR{01} are in units of clock ticks minus one, but the ns2cycle macro mistakenly adds one, inflating the number of clock ticks and making it impossible to set any of these fields to zero. Signed-off-by: Matt Reimer <mreimer@vpop.net> Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-01-05[MTD] [NAND] pxa3xx: fix non-page-aligned readsMatt Reimer
Reads from non-page-aligned addresses were broken because while the address to read from was correctly written to NDCB*, a full page was always read. Fix this by ignoring the column and only using the page address. I suspect this whole-page behavior is due to the controller's need to read the entire page in order to generate correct ECC. In the non-ECC case this could be optimized to use the column address, and to set the read length to what is being requested rather than the length of an entire page. Signed-off-by: Matt Reimer <mreimer@vpop.net> Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-01-05[MTD] [NAND] fix nandsim sched.h referencesRandy Dunlap
Fix sched.h references: build-r7149.out:/local/linsrc/linux-next-20081215/drivers/mtd/nand/nandsim.c:1326: error: dereferencing pointer to incomplete type build-r7149.out:/local/linsrc/linux-next-20081215/drivers/mtd/nand/nandsim.c:1326: error: 'PF_MEMALLOC' undeclared (first use in this function) build-r7149.out:/local/linsrc/linux-next-20081215/drivers/mtd/nand/nandsim.c:1328: error: dereferencing pointer to incomplete type build-r7149.out:/local/linsrc/linux-next-20081215/drivers/mtd/nand/nandsim.c:1335: error: dereferencing pointer to incomplete type build-r7149.out:/local/linsrc/linux-next-20081215/drivers/mtd/nand/nandsim.c:1335: error: 'PF_MEMALLOC' undeclared (first use in this function) build-r7149.out:make[4]: *** [drivers/mtd/nand/nandsim.o] Error 1 Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-01-05[MTD] [NAND] alauda: use USB API functions rather than constantsJulia Lawall
This set of patches introduces calls to the following set of functions: usb_endpoint_dir_in(epd) usb_endpoint_dir_out(epd) usb_endpoint_is_bulk_in(epd) usb_endpoint_is_bulk_out(epd) usb_endpoint_is_int_in(epd) usb_endpoint_is_int_out(epd) usb_endpoint_num(epd) usb_endpoint_type(epd) usb_endpoint_xfer_bulk(epd) usb_endpoint_xfer_control(epd) usb_endpoint_xfer_int(epd) usb_endpoint_xfer_isoc(epd) In some cases, introducing one of these functions is not possible, and it just replaces an explicit integer value by one of the following constants: USB_ENDPOINT_XFER_BULK USB_ENDPOINT_XFER_CONTROL USB_ENDPOINT_XFER_INT USB_ENDPOINT_XFER_ISOC An extract of the semantic patch that makes these changes is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @r1@ struct usb_endpoint_descriptor *epd; @@ - ((epd->bmAttributes & \(USB_ENDPOINT_XFERTYPE_MASK\|3\)) == - \(USB_ENDPOINT_XFER_CONTROL\|0\)) + usb_endpoint_xfer_control(epd) @r5@ struct usb_endpoint_descriptor *epd; @@ - ((epd->bEndpointAddress & \(USB_ENDPOINT_DIR_MASK\|0x80\)) == - \(USB_DIR_IN\|0x80\)) + usb_endpoint_dir_in(epd) @inc@ @@ #include <linux/usb.h> @depends on !inc && (r1||r5)@ @@ + #include <linux/usb.h> #include <linux/usb/...> // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2009-01-05avr32: Allow reserving multiple pins at onceAlex Raimondi
at32_reserve_pin now takes an u32 bitmask rather than a single pin. This allows to reserve multiple pins at once. Remove (undocumented) SDCS (pin PE26) from reservation in board setup code. Signed-off-by: Alex Raimondi <raimondi@miromico.ch> Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
2009-01-05favr-32: Remove deprecated callHaavard Skinnemoen
at32_add_system_devices() is deprecated, so remove the call to it. Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
2009-01-05Merge branch 'i2c-next-s3c' into i2c-nextBen Dooks
2009-01-05MIMC200: Remove deprecated callMark Jackson
This patch removes a call to the deprecated function at32_add_system_devices(). Signed-off-by: Mark Jackson <mpfj@mimc.co.uk> Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
2009-01-05Merge branch 'topic/usbaudio' into for-linusTakashi Iwai
2009-01-05Merge branch 'topic/hda' into for-linusTakashi Iwai
2009-01-05Merge branch 'topic/asoc' into for-linusTakashi Iwai
2009-01-05Merge branch 'master' of ↵David Woodhouse
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 Conflicts: arch/arm/mach-pxa/corgi.c arch/arm/mach-pxa/poodle.c arch/arm/mach-pxa/spitz.c
2009-01-05avr: struct device - replace bus_id with dev_name(), dev_set_name()Kay Sievers
(I did not compile or test it, please let me know, or help fixing it, if something is wrong with the conversion) This patch is part of a larger patch series which will remove the "char bus_id[20]" name string from struct device. The device name is managed in the kobject anyway, and without any size limitation, and just needlessly copied into "struct device". To set and read the device name dev_name(dev) and dev_set_name(dev) must be used. If your code uses static kobjects, which it shouldn't do, "const char *init_name" can be used to statically provide the name the registered device should have. At registration time, the init_name field is cleared, to enforce the use of dev_name(dev) to access the device name at a later time. We need to get rid of all occurrences of bus_id in the entire tree to be able to enable the new interface. Please apply this patch, and possibly convert any remaining remaining occurrences of bus_id. We want to submit a patch to -next, which will remove bus_id from "struct device", to find the remaining pieces to convert, and finally switch over to the new api, which will remove the 20 bytes array and does no longer have a size limitation. Thanks, Kay From: Kay Sievers <kay.sievers@vrfy.org> Subject: avr: struct device - replace bus_id with dev_name(), dev_set_name() Cc: Haavard Skinnemoen <hskinnemoen@atmel.com> Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
2009-01-05proc: remove write-only variable in proc_pident_lookup()WANG Cong
Signed-off-by: WANG Cong <wangcong@zeuux.org> Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
2009-01-05proc: fix sparse warningHannes Eder
fs/proc/base.c:312:4: warning: do-while statement is not a compound statement Signed-off-by: Hannes Eder <hannes@hanneseder.net> Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
2009-01-05proc: add /proc/*/stackKen Chen
/proc/*/stack adds the ability to query a task's stack trace. It is more useful than /proc/*/wchan as it provides full stack trace instead of single depth. Example output: $ cat /proc/self/stack [<c010a271>] save_stack_trace_tsk+0x17/0x35 [<c01827b4>] proc_pid_stack+0x4a/0x76 [<c018312d>] proc_single_show+0x4a/0x5e [<c016bdec>] seq_read+0xf3/0x29f [<c015a004>] vfs_read+0x6d/0x91 [<c015a0c1>] sys_read+0x3b/0x60 [<c0102eda>] syscall_call+0x7/0xb [<ffffffff>] 0xffffffff [add save_stack_trace_tsk() on mips, ACK Ralf --adobriyan] Signed-off-by: Ken Chen <kenchen@google.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
2009-01-05proc: remove '##' usageAlexey Dobriyan
Inability to jump to /proc/*/foo handlers with ctags is annoying. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
2009-01-05proc: remove useless WARN_ONsAlexey Dobriyan
NULL "struct inode *" means VFS passed NULL inode to ->open. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
2009-01-05proc: stop using BKLAlexey Dobriyan
There are four BKL users in proc: de_put(), proc_lookup_de(), proc_readdir_de(), proc_root_readdir(), 1) de_put() ----------- de_put() is classic atomic_dec_and_test() refcount wrapper -- no BKL needed. BKL doesn't matter to possible refcount leak as well. 2) proc_lookup_de() ------------------- Walking PDE list is protected by proc_subdir_lock(), proc_get_inode() is potentially blocking, all callers of proc_lookup_de() eventually end up from ->lookup hooks which is protected by directory's ->i_mutex -- BKL doesn't protect anything. 3) proc_readdir_de() -------------------- "." and ".." part doesn't need BKL, walking PDE list is under proc_subdir_lock, calling filldir callback is potentially blocking because it writes to luserspace. All proc_readdir_de() callers eventually come from ->readdir hook which is under directory's ->i_mutex -- BKL doesn't protect anything. 4) proc_root_readdir_de() ------------------------- proc_root_readdir_de is ->readdir hook, see (3). Since readdir hooks doesn't use BKL anymore, switch to generic_file_llseek, since it also takes directory's i_mutex. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
2009-01-05rcu: eliminate synchronize_rcu_xxx macroPaul E. McKenney
Impact: cleanup Expand macro into two files. The synchronize_rcu_xxx macro is quite ugly and it's only used by two callers, so expand it instead. This makes this code easier to change. Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-01-05rcu: make treercu safe for suspend and resumePaul E. McKenney
Impact: fix kernel warnings [and potential crash] during suspend+resume Kudos to both Dhaval Giani and Jens Axboe for finding a bug in treercu that causes warnings after suspend-resume cycles in Dhaval's case and during stress tests in Jens's case. It would also probably cause failures if heavily stressed. The solution, ironically enough, is to revert to rcupreempt's code for initializing the dynticks state. And the patch even results in smaller code -- so what was I thinking??? This is 2.6.29 material, given that people really do suspend and resume Linux these days. ;-) Reported-by: Dhaval Giani <dhaval@linux.vnet.ibm.com> Reported-by: Jens Axboe <jens.axboe@oracle.com> Tested-by: Dhaval Giani <dhaval@linux.vnet.ibm.com> Tested-by: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-01-05rcu: fix rcutree grace-period-latency bug on small systemsPaul E. McKenney
Impact: fix delays during bootup Kudos to Andi Kleen for finding a grace-period-latency problem! The problem was that the special-case code for small machines never updated the ->signaled field to indicate that grace-period initialization had completed, which prevented force_quiescent_state() from ever expediting grace periods. This problem resulted in grace periods extending for more than 20 seconds. Not subtle. I introduced this bug during my inspection process when I fixed a race between grace-period initialization and force_quiescent_state() execution. The following patch properly updates the ->signaled field for the "small"-system case (no more than 32 CPUs for 32-bit kernels and no more than 64 CPUs for 64-bit kernels). Reported-by: Andi Kleen <andi@firstfloor.org> Tested-by: Andi Kleen <andi@firstfloor.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-01-05tcp: Kill extraneous SPLICE_F_NONBLOCK checks.David S. Miller
In splice TCP receive, the SPLICE_F_NONBLOCK flag is used to compute the "timeo" value. So checking it again inside of the main receive loop to trigger -EAGAIN processing is entirely unnecessary. Noticed by Jarek P. and Lennert Buytenhek. Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-05sparc: Remove reg*.h from KbuildDavid S. Miller
Forgot to commit this in previous change, noticed by Sam. Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-05MAINTAINERS: squashfs entryPhillip Lougher
Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
2009-01-05Squashfs: documentationPhillip Lougher
Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
2009-01-05Squashfs: initrd supportPhillip Lougher
Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
2009-01-05Squashfs: Kconfig entryPhillip Lougher
Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
2009-01-05Squashfs: MakefilesPhillip Lougher
Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
2009-01-05Squashfs: header filesPhillip Lougher
Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
2009-01-05Squashfs: block operationsPhillip Lougher
Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
2009-01-05Squashfs: cache operationsPhillip Lougher
Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
2009-01-05Squashfs: uid/gid lookup operationsPhillip Lougher
Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
2009-01-05Squashfs: fragment block operationsPhillip Lougher
Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
2009-01-05Squashfs: export operationsPhillip Lougher
Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
2009-01-05Squashfs: super block operationsPhillip Lougher
Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
2009-01-05Squashfs: symlink operationsPhillip Lougher
Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
2009-01-05Squashfs: regular file operationsPhillip Lougher
Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
2009-01-05Squashfs: directory readdir operationsPhillip Lougher
Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
2009-01-05Squashfs: directory lookup operationsPhillip Lougher
Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
2009-01-05Squashfs: inode operationsPhillip Lougher
Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
2009-01-05SELinux: shrink sizeof av_inhert selinux_class_perm and contextEric Paris
I started playing with pahole today and decided to put it against the selinux structures. Found we could save a little bit of space on x86_64 (and no harm on i686) just reorganizing some structs. Object size changes: av_inherit: 24 -> 16 selinux_class_perm: 48 -> 40 context: 80 -> 72 Admittedly there aren't many of av_inherit or selinux_class_perm's in the kernel (33 and 1 respectively) But the change to the size of struct context reverberate out a bit. I can get some hard number if they are needed, but I don't see why they would be. We do change which cacheline context->len and context->str would be on, but I don't see that as a problem since we are clearly going to have to load both if the context is to be of any value. I've run with the patch and don't seem to be having any problems. An example of what's going on using struct av_inherit would be: form: to: struct av_inherit { struct av_inherit { u16 tclass; const char **common_pts; const char **common_pts; u32 common_base; u32 common_base; u16 tclass; }; (notice all I did was move u16 tclass to the end of the struct instead of the beginning) Memory layout before the change: struct av_inherit { u16 tclass; /* 2 */ /* 6 bytes hole */ const char** common_pts; /* 8 */ u32 common_base; /* 4 */ /* 4 byes padding */ /* size: 24, cachelines: 1 */ /* sum members: 14, holes: 1, sum holes: 6 */ /* padding: 4 */ }; Memory layout after the change: struct av_inherit { const char ** common_pts; /* 8 */ u32 common_base; /* 4 */ u16 tclass; /* 2 */ /* 2 bytes padding */ /* size: 16, cachelines: 1 */ /* sum members: 14, holes: 0, sum holes: 0 */ /* padding: 2 */ }; Signed-off-by: Eric Paris <eparis@redhat.com> Signed-off-by: James Morris <jmorris@namei.org>
2009-01-05sparc: Clean arch-specific code in prom_common.cJulian Calaby
prom_nextprop() and prom_firstprop() have slightly different calling conventions in 32 and 64 bit SPARC. prom_common.c uses a ifdef guard to ensure that these functions are called correctly. Adjust code to eliminate this ifdef by using a calling convention that is compatible with both 32 and 64 bit SPARC. Signed-off-by: Julian Calaby <julian.calaby@gmail.com> Reviewed-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-05tcp: don't mask EOF and socket errors on nonblocking splice receiveLennert Buytenhek
Currently, setting SPLICE_F_NONBLOCK on splice from a TCP socket results in masking of EOF (RDHUP) and error conditions on the socket by an -EAGAIN return. Move the NONBLOCK check in tcp_splice_read() to be after the EOF and error checks to fix this. Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-05GFS2: Use DEFINE_SPINLOCKJulia Lawall
SPIN_LOCK_UNLOCKED is deprecated. The following makes the change suggested in Documentation/spinlocks.txt The semantic patch that makes this change is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @@ declarer name DEFINE_SPINLOCK; identifier xxx_lock; @@ - spinlock_t xxx_lock = SPIN_LOCK_UNLOCKED; + DEFINE_SPINLOCK(xxx_lock); // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2009-01-05GFS2: Fix use-after-free bug on umount (try #2)Steven Whitehouse
This should solve the issue with the previous attempt at fixing this. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2009-01-05Revert "GFS2: Fix use-after-free bug on umount"Steven Whitehouse
This reverts commit 78802499912f1ba31ce83a94c55b5a980f250a43. The original patch is causing problems in relation to order of operations at umount in relation to jdata files. I need to fix this a different way. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2009-01-05GFS2: Streamline alloc calculations for writesSteven Whitehouse
This patch removes some unused code, and make the calculation of the number of blocks required conditional in order to reduce the number of times this (potentially expensive) calculation is done. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2009-01-05GFS2: Send useful information with uevent messagesSteven Whitehouse
In order to distinguish between two differing uevent messages and to avoid using the (racy) method of reading status from sysfs in future, this adds some status information to our uevent messages. Btw, before anybody says "sysfs isn't racy", I'm aware of that, but the way that GFS2 was using it (send an ambiugous uevent and then expect the receiver to read sysfs to find out the status of the reported operation) was. The additional benefit of using the new interface is that it should be possible for a node to recover multiple journals at the same time, since there is no longer any confusion as to which journal the status belongs to. At some future stage, when all the userland programs have been converted, I intend to remove the old interface. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
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