- 05 Feb, 2008 29 commits
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Yinghai Lu authored
with reverting "x86, serial: convert legacy COM ports to platform devices", we will have the serial console before the port is probled again. uart_add_one_port==>uart_configure_port==>set_mcttrl(port, 0) will clear the DTR setting by uart_set_options(). then I will lose my output from serial console again. So try to keep DTR in uart_configure_port() Signed-off-by:
Yinghai Lu <yinghai.lu@sun.com> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Andi Kleen <ak@suse.de> Cc: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Julia Lawall authored
pci_get_slot does a pci_dev_get, so pci_dev_put needs to be called in an error case. An extract of the semantic match used to find the problem is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @@ type find1.T,T1,T2; identifier find1.E; statement find1.S; expression x1,x2,x3; expression find1.test; int ret != 0; @@ T E; ... ( * E = pci_get_slot(...); if (E == NULL) S | * if ((E = pci_get_slot(...)) == NULL) S ) ... when != pci_dev_put(...,(T1)E,...) when != if (E != NULL) { ... pci_dev_put(...,(T1)E,...); ...} when != x1 = (T1)E when != E = x3; when any if (test) { ... when != pci_dev_put(...,(T2)E,...) when != if (E != NULL) { ... pci_dev_put(...,(T2)E,...); ...} when != x2 = (T2)E ( * return; | * return ret; ) } // </smpl> Signed-off-by:
Julia Lawall <julia@diku.dk> Signed-off-by:
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Julia Lawall authored
of_iomap calls ioremap, and so should be matched with an iounmap. At the two error returns, the result of calling of_iomap is only stored in a local variable, so these error paths need to call iounmap. Furthermore, this function ultimately stores the result of of_iomap in an array that is local to the file. These values should be iounmapped at some point. I have added a corresponding call to iounmap at the end of the function m8xx_remove. The problem was found using the following semantic match. (http://www.emn.fr/x-info/coccinelle/) // <smpl> @@ type T,T1,T2; identifier E; statement S; expression x1,x2,x3; int ret; @@ T E; ... * E = of_iomap(...); if (E == NULL) S ... when != iounmap(...,(T1)E,...) when != if (E != NULL) { ... iounmap(...,(T1)E,...); ...} when != x1 = (T1)E when != E = x3; when any if (...) { ... when != iounmap(...,(T2)E,...) when != if (E != NULL) { ... iounmap(...,(T2)E,...); ...} when != x2 = (T2)E ( * return; | * return ret; ) } // </smpl> Signed-off-by:
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David Brownell authored
Update the AT91 CF driver to use the generic GPIO calls instead of the AT91-specific ones; and request exclusive use of those signals. Minor tweaks to cleanup code paths: always in reverse order of how the resources were allocated, with remove() matching the fault paths of probe(). Signed-off-by:
David Brownell <dbrownell@users.sourceforge.net> Signed-off-by:
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Richard Knutsson authored
Fixing: CHECK drivers/net/pcmcia/pcnet_cs.c drivers/net/pcmcia/pcnet_cs.c:523:15: warning: symbol 'hw_info' shadows an earlier one drivers/net/pcmcia/pcnet_cs.c:148:18: originally declared here Signed-off-by:
Richard Knutsson <ricknu-0@student.ltu.se> Acked-by:
Alan Cox <alan@redhat.com> Signed-off-by:
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Richard Knutsson authored
Fixing: CHECK drivers/net/pcmcia/fmvj18x_cs.c drivers/net/pcmcia/fmvj18x_cs.c:1205:6: warning: symbol 'i' shadows an earlier one drivers/net/pcmcia/fmvj18x_cs.c:1179:9: originally declared here Signed-off-by:
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Richard Knutsson authored
Use 'max(x,y)' instead of 'x < y ? y : x'. Signed-off-by:
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Richard Knutsson authored
Fixing: CHECK drivers/net/pcmcia/axnet_cs.c drivers/net/pcmcia/axnet_cs.c:994:5: warning: symbol 'ax_close' was not declared. Should it be static? drivers/net/pcmcia/axnet_cs.c:1017:6: warning: symbol 'ei_tx_timeout' was not declared. Should it be static? Signed-off-by:
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Richard Knutsson authored
Fixing: CHECK drivers/net/pcmcia/3c574_cs.c drivers/net/pcmcia/3c574_cs.c:695:7: warning: symbol 'i' shadows an earlier one drivers/net/pcmcia/3c574_cs.c:636:6: originally declared here Signed-off-by:
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Randy Dunlap authored
- Print the invalid CIS filename in the invalid filename message. - Use sizeof() instead of hard-coded constant for buffer size. Signed-off-by:
Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by:
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David Brownell authored
This stops the pcmcia core from using dev->power.power_state; that field is deprecated (overdue for removal) and the only reason to update it was to make the /sys/devices/.../power/state files (now removed) work better. Signed-off-by:
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Olof Johansson authored
Remove kio_addr_t, and replace it with unsigned int. No known architecture needs more than 32 bits for IO addresses and ports and having a separate type for it is just messy. Signed-off-by:
Olof Johansson <olof@lixom.net> Cc: Christoph Hellwig <hch@lst.de> Cc: Matthew Wilcox <matthew@wil.cx> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Dominik Brodowski <linux@dominikbrodowski.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by:
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Olof Johansson authored
Convert the io_req_t members to unsigned int, to allow use on machines with more than 16 bits worth of IO ports (i.e. secondary busses on ppc64, etc). There was only a couple of places in drivers where a change was needed. I left printk formats alone (there are lots of %04x-style formats in there), mostly to not change the format on the platforms that only have 16-bit io addresses, but also because the padding doesn't really add all that much value most of the time. I found only one sprintf of an address, and upsized the string accordingly (I doubt anyone will have anywhere near INT_MAX as irq value, but at least there's room for it now). Signed-off-by:
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Jiri Olsa authored
remove dead config symbols from M32R code Signed-off-by:
Jiri Olsa <olsajiri@gmail.com> Cc: Hirokazu Takata <takata@linux-m32r.org> Signed-off-by:
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Andrew Morton authored
CC [M] sound/ppc/awacs.o In file included from sound/ppc/awacs.c:24: include/asm/nvram.h:62: error: field 'partition' has incomplete type Reported-by:
Mariusz Kozlowski <m.kozlowski@tuxland.pl> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by:
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Al Viro authored
FATAL: drivers/bluetooth/btsdio: sizeof(struct sdio_device_id)=12 is not a modulo of the size of section __mod_sdio_device_table=30. Fix definition of struct sdio_device_id in mod_devicetable.h m68k has 16bit alignment for unsigned long. Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Sam Ravnborg <sam@ravnborg.org> Cc: Pierre Ossman <drzeus@drzeus.cx> CC: Marcel Holtmann <marcel@holtmann.org> Signed-off-by:
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Davide Libenzi authored
Remove the broken status to CONFIG_TIMERFD. Signed-off-by:
Davide Libenzi <davidel@xmailserver.org> Cc: Michael Kerrisk <mtk-manpages@gmx.net> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by:
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Davide Libenzi authored
Wires up the new timerfd API to the x86 family. Signed-off-by:
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Davide Libenzi authored
This is the new timerfd API as it is implemented by the following patch: int timerfd_create(int clockid, int flags); int timerfd_settime(int ufd, int flags, const struct itimerspec *utmr, struct itimerspec *otmr); int timerfd_gettime(int ufd, struct itimerspec *otmr); The timerfd_create() API creates an un-programmed timerfd fd. The "clockid" parameter can be either CLOCK_MONOTONIC or CLOCK_REALTIME. The timerfd_settime() API give new settings by the timerfd fd, by optionally retrieving the previous expiration time (in case the "otmr" parameter is not NULL). The time value specified in "utmr" is absolute, if the TFD_TIMER_ABSTIME bit is set in the "flags" parameter. Otherwise it's a relative time. The timerfd_gettime() API returns the next expiration time of the timer, or {0, 0} if the timerfd has not been set yet. Like the previous timerfd API implementation, read(2) and poll(2) are supported (with the same interface). Here's a simple test program I used to exercise the new timerfd APIs: http://www.xmailserver.org/timerfd-test2.c [akpm@linux-foundation.org: coding-style cleanups] [akpm@linux-foundation.org: fix ia64 build] [akpm@linux-foundation.org: fix m68k build] [akpm@linux-foundation.org: fix mips build] [akpm@linux-foundation.org: fix alpha, arm, blackfin, cris, m68k, s390, sparc and sparc64 builds] [heiko.carstens@de.ibm.com: fix s390] [akpm@linux-foundation.org: fix powerpc build] [akpm@linux-foundation.org: fix sparc64 more] Signed-off-by:Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Michael Kerrisk <mtk.manpages@gmail.com> Cc: Davide Libenzi <davidel@xmailserver.org> Signed-off-by:
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Davide Libenzi authored
I think that advancing the timer against the timer's current "now" can be a pretty common usage, so, w/out exposing hrtimer's internals, we add a new hrtimer_forward_now() function. Signed-off-by:
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Oleg Nesterov authored
As Roland pointed out, we have the very old problem with exec. de_thread() sets SIGNAL_GROUP_EXIT, kills other threads, changes ->group_leader and then clears signal->flags. All signals (even fatal ones) sent in this window (which is not too small) will be lost. With this patch exec doesn't abuse SIGNAL_GROUP_EXIT. signal_group_exit(), the new helper, should be used to detect exit_group() or exec() in progress. It can have more users, but this patch does only strictly necessary changes. Signed-off-by:
Oleg Nesterov <oleg@tv-sign.ru> Cc: Davide Libenzi <davidel@xmailserver.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Robin Holt <holt@sgi.com> Cc: Roland McGrath <roland@redhat.com> Signed-off-by:
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Oleg Nesterov authored
Every time we set SIGNAL_GROUP_EXIT or clear SIGNAL_STOP_DEQUEUED we also reset ->group_stop_count. This means that the SIGNAL_GROUP_EXIT check in handle_group_stop() is not needed, and do_signal_stop() should check SIGNAL_STOP_DEQUEUED only when ->group_stop_count == 0. With these changes handle_group_stop() becomes the subset of do_signal_stop(), we can kill it and use do_signal_stop() instead. Also, a preparation for the next patch. Signed-off-by:
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Oleg Nesterov authored
When __group_complete_signal() sees sig_kernel_coredump() signal, it starts the group stop, but sets ->group_exit_task = t in a hope that "t" will actually dequeue this signal and invoke do_coredump(). However, by the time "t" enters get_signal_to_deliver() it is possible that the signal was blocked/ignored or we have another pending !SIG_KERNEL_COREDUMP_MASK signal which will be dequeued first. This means the task could be stopped but not killed. Remove this code from __group_complete_signal(). Note also this patch removes the bogus signal_wake_up(t, 1). This thread can't be STOPPED/TRACED, note the corresponding check in wants_signal(). Signed-off-by:
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Andrew Morton authored
Ulrich says that we never used this clone flags and that nothing should be using it. As we're down to only a single bit left in clone's flags argument, let's add a warning to check that no userspace is actually using it. Hopefully we will be able to recycle it. Roland said: CLONE_STOPPED was previously used by some NTPL versions when under thread_db (i.e. only when being actively debugged by gdb), but not for a long time now, and it never worked reliably when it was used. Removing it seems fine to me. [akpm@linux-foundation.org: it looks like CLONE_DETACHED is being used] Cc: Ulrich Drepper <drepper@redhat.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Roland McGrath <roland@redhat.com> Signed-off-by:
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Andrew Morton authored
It was dumb to make get_task_comm() return void. Change it to return a pointer to the resulting output for caller convenience. Cc: Ulrich Drepper <drepper@redhat.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Roland McGrath <roland@redhat.com> Signed-off-by:
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Peter Zijlstra authored
On Sat, 2008-01-05 at 13:35 -0800, Davide Libenzi wrote: > I remember I talked with Arjan about this time ago. Basically, since 1) > you can drop an epoll fd inside another epoll fd 2) callback-based wakeups > are used, you can see a wake_up() from inside another wake_up(), but they > will never refer to the same lock instance. > Think about: > > dfd = socket(...); > efd1 = epoll_create(); > efd2 = epoll_create(); > epoll_ctl(efd1, EPOLL_CTL_ADD, dfd, ...); > epoll_ctl(efd2, EPOLL_CTL_ADD, efd1, ...); > > When a packet arrives to the device underneath "dfd", the net code will > issue a wake_up() on its poll wake list. Epoll (efd1) has installed a > callback wakeup entry on that queue, and the wake_up() performed by the > "dfd" net code will end up in ep_poll_callback(). At this point epoll > (efd1) notices that it may have some event ready, so it needs to wake up > the waiters on its poll wait list (efd2). So it calls ep_poll_safewake() > that ends up in another wake_up(), after having checked about the > recursion constraints. That are, no more than EP_MAX_POLLWAKE_NESTS, to > avoid stack blasting. Never hit the same queue, to avoid loops like: > > epoll_ctl(efd2, EPOLL_CTL_ADD, efd1, ...); > epoll_ctl(efd3, EPOLL_CTL_ADD, efd2, ...); > epoll_ctl(efd4, EPOLL_CTL_ADD, efd3, ...); > epoll_ctl(efd1, EPOLL_CTL_ADD, efd4, ...); > > The code "if (tncur->wq == wq || ..." prevents re-entering the same > queue/lock. Since the epoll code is very careful to not nest same instance locks allow the recursion. Signed-off-by:
Peter Zijlstra <a.p.zijlstra@chello.nl> Tested-by:
Stefan Richter <stefanr@s5r6.in-berlin.de> Acked-by:
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Andrew Morton authored
m68k: drivers/net/wireless/b43/main.c:251: error: implicit declaration of function 'mmiowb' Cc: "John W. Linville" <linville@tuxdriver.com> Signed-off-by:
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Oleg Nesterov authored
Fix ->vm_file accounting, mmap_region() may do do_munmap(). Signed-off-by:
Miklos Szeredi <mszeredi@suse.cz> Cc: <stable@kernel.org> Signed-off-by:
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Andrew Morton authored
arch/x86/kvm/x86.c: In function 'emulator_cmpxchg_emulated': arch/x86/kvm/x86.c:1746: warning: passing argument 2 of 'vcpu->arch.mmu.gva_to_gpa' makes integer from pointer without a cast arch/x86/kvm/x86.c:1746: warning: 'addr' is used uninitialized in this function Is true. Local variable `addr' shadows incoming arg `addr'. Avi is on vacation for a while, so... Cc: Avi Kivity <avi@qumranet.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by:
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- 04 Feb, 2008 11 commits
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Linus Torvalds authored
* 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm: (44 commits) [ARM] 4822/1: RealView: Change the REALVIEW_MPCORE configuration option [ARM] 4821/1: RealView: Remove the platform dependencies from localtimer.c [ARM] 4820/1: RealView: Select the timer IRQ at run-time [ARM] 4819/1: RealView: Fix entry-macro.S to work with multiple platforms [ARM] 4818/1: RealView: Add core-tile detection [ARM] 4817/1: RealView: Move the AMBA resource definitions to realview_eb.c [ARM] 4816/1: RealView: Move the platform-specific definitions into board-eb.h [ARM] 4815/1: RealView: Add clockevents suport for the local timers [ARM] 4814/1: RealView: Add broadcasting clockevents support for ARM11MPCore [ARM] 4813/1: Add SMP helper functions for clockevents support [ARM] 4812/1: RealView: clockevents support for the RealView platforms [ARM] 4811/1: RealView: clocksource support for the RealView platforms [ARM] 4736/1: Export atags to userspace and allow kexec to use customised atags [ARM] 4798/1: pcm027: fix missing header file [ARM] 4803/1: pxa: fix building issue of poodle.c caused by patch 4737/1 [ARM] 4801/1: pxa: fix building issues of missing pxa2xx-regs.h [ARM] pxa: introduce sysdev for pxa3xx static memory controller [ARM] pxa: add preliminary suspend/resume code for pxa3xx [ARM] pxa: introduce sysdev for GPIO register saving/restoring [ARM] pxa: introduce sysdev for IRQ register saving/restoring ...
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git://git.kernel.org/pub/scm/linux/kernel/git/christoph/vmLinus Torvalds authored
* 'slub-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/christoph/vm: Explain kmem_cache_cpu fields SLUB: Do not upset lockdep SLUB: Fix coding style violations Add parameter to add_partial to avoid having two functions SLUB: rename defrag to remote_node_defrag_ratio Move count_partial before kmem_cache_shrink SLUB: Fix sysfs refcounting slub: fix shadowed variable sparse warnings
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Christoph Lameter authored
Add some comments explaining the fields of the kmem_cache_cpu structure. Signed-off-by:
Christoph Lameter <clameter@sgi.com> Signed-off-by:
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root authored
inconsistent {softirq-on-W} -> {in-softirq-W} usage. swapper/0 [HC0[0]:SC1[1]:HE0:SE0] takes: (&n->list_lock){-+..}, at: [<ffffffff802935c1>] add_partial+0x31/0xa0 {softirq-on-W} state was registered at: [<ffffffff80259fb8>] __lock_acquire+0x3e8/0x1140 [<ffffffff80259838>] debug_check_no_locks_freed+0x188/0x1a0 [<ffffffff8025ad65>] lock_acquire+0x55/0x70 [<ffffffff802935c1>] add_partial+0x31/0xa0 [<ffffffff805c76de>] _spin_lock+0x1e/0x30 [<ffffffff802935c1>] add_partial+0x31/0xa0 [<ffffffff80296f9c>] kmem_cache_open+0x1cc/0x330 [<ffffffff805c7984>] _spin_unlock_irq+0x24/0x30 [<ffffffff802974f4>] create_kmalloc_cache+0x64/0xf0 [<ffffffff80295640>] init_alloc_cpu_cpu+0x70/0x90 [<ffffffff8080ada5>] kmem_cache_init+0x65/0x1d0 [<ffffffff807f1b4e>] start_kernel+0x23e/0x350 [<ffffffff807f112d>] _sinittext+0x12d/0x140 [<ffffffffffffffff>] 0xffffffffffffffff This change isn't really necessary for correctness, but it prevents lockdep from getting upset and then disabling itself. Signed-off-by: -
Pekka Enberg authored
This fixes most of the obvious coding style violations in mm/slub.c as reported by checkpatch. Acked-by:
Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by:
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Christoph Lameter authored
Add a parameter to add_partial instead of having separate functions. The parameter allows a more detailed control of where the slab pages is placed in the partial queues. If we put slabs back to the front then they are likely immediately used for allocations. If they are put at the end then we can maximize the time that the partial slabs spent without being subject to allocations. When deactivating slab we can put the slabs that had remote objects freed (we can see that because objects were put on the freelist that requires locks) to them at the end of the list so that the cachelines of remote processors can cool down. Slabs that had objects from the local cpu freed to them (objects exist in the lockless freelist) are put in the front of the list to be reused ASAP in order to exploit the cache hot state of the local cpu. Patch seems to slightly improve tbench speed (1-2%). Signed-off-by:
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Christoph Lameter authored
The NUMA defrag works by allocating objects from partial slabs on remote nodes. Rename it to remote_node_defrag_ratio to be clear about this. Signed-off-by:
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Christoph Lameter authored
Move the counting function for objects in partial slabs so that it is placed before kmem_cache_shrink. Signed-off-by:
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Christoph Lameter authored
If CONFIG_SYSFS is set then free the kmem_cache structure when sysfs tells us its okay. Otherwise there is the danger (as pointed out by Al Viro) that sysfs thinks the kobject still exists after kmem_cache_destroy() removed it. Signed-off-by:
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Harvey Harrison authored
Introduce 'len' at outer level: mm/slub.c:3406:26: warning: symbol 'n' shadows an earlier one mm/slub.c:3393:6: originally declared here No need to declare new node: mm/slub.c:3501:7: warning: symbol 'node' shadows an earlier one mm/slub.c:3491:6: originally declared here No need to declare new x: mm/slub.c:3513:9: warning: symbol 'x' shadows an earlier one mm/slub.c:3492:6: originally declared here Signed-off-by:
Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by:
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Russell King authored
* at91: [ARM] 4802/1: Fix typo and remove vague comment [ARM] 4660/3: at91: allow selecting UART for early kernel messages [ARM] 4739/1: at91sam9263: make gpio bank C and D irqs work * ixp: [ARM] 4809/2: ixp4xx: Merge dsmg600-power.c into dsmg600-setup.c [ARM] 4808/2: ixp4xx: Merge nas100d-power.c into nas100d-setup.c [ARM] 4807/2: ixp4xx: Merge nslu2-power.c into nslu2-setup.c [ARM] 4806/1: ixp4xx: Ethernet support for the nslu2 and nas100d boards [ARM] 4805/1: ixp4xx: Use leds-gpio driver instead of IXP4XX-GPIO-LED driver [ARM] 4715/2: Ethernet support for IXDP425 boards [ARM] 4714/2: Headers for IXP4xx built-in Ethernet and WAN drivers [ARM] 4713/3: Adds drivers for IXP4xx QMgr and NPE features [ARM] 4712/2: Adds functions to read and write IXP4xx "feature" bits [ARM] 4774/2: ixp4xx: Register dsmg600 rtc i2c_board_info [ARM] 4773/2: ixp4xx: Register nas100d rtc i2c_board_info [ARM] 4772/2: ixp4xx: Register nslu2 rtc i2c_board_info [ARM] 4769/2: ixp4xx: Button updates for the dsmg600 board [ARM] 4768/2: ixp4xx: Button and LED updates for the nas100d board [ARM] 4767/2: ixp4xx: Add bitops.h include to io.h [ARM] 4766/2: ixp4xx: Update ixp4xx_defconfig, enabling all supported boards * master: [ARM] 4810/1: - Fix 'section mismatch' building warnings [ARM] xtime_seqlock: fix more ARM machines for xtime deadlocking [ARM] 21285 serial: fix build error * misc: [ARM] 4736/1: Export atags to userspace and allow kexec to use customised atags * pxa: [ARM] 4798/1: pcm027: fix missing header file [ARM] 4803/1: pxa: fix building issue of poodle.c caused by patch 4737/1 [ARM] 4801/1: pxa: fix building issues of missing pxa2xx-regs.h [ARM] pxa: introduce sysdev for pxa3xx static memory controller [ARM] pxa: add preliminary suspend/resume code for pxa3xx [ARM] pxa: introduce sysdev for GPIO register saving/restoring [ARM] pxa: introduce sysdev for IRQ register saving/restoring [ARM] pxa: fix the warning of undeclared "struct pxaohci_platform_data" [ARM] pxa: change set_kset_name() to direct name assignment for MFP sysclass * realview: [ARM] 4822/1: RealView: Change the REALVIEW_MPCORE configuration option [ARM] 4821/1: RealView: Remove the platform dependencies from localtimer.c [ARM] 4820/1: RealView: Select the timer IRQ at run-time [ARM] 4819/1: RealView: Fix entry-macro.S to work with multiple platforms [ARM] 4818/1: RealView: Add core-tile detection [ARM] 4817/1: RealView: Move the AMBA resource definitions to realview_eb.c [ARM] 4816/1: RealView: Move the platform-specific definitions into board-eb.h [ARM] 4815/1: RealView: Add clockevents suport for the local timers [ARM] 4814/1: RealView: Add broadcasting clockevents support for ARM11MPCore [ARM] 4813/1: Add SMP helper functions for clockevents support [ARM] 4812/1: RealView: clockevents support for the RealView platforms [ARM] 4811/1: RealView: clocksource support for the RealView platforms
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