- 28 Mar, 2008 21 commits
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Andrew Morton authored
Mar 23 09:06:31 opensuse103 kernel: Installing 9P2000 support Mar 23 09:06:31 opensuse103 kernel: sys_init_module: '9pnet_fd'->init suspiciously returned 1, it should follow 0/-E convention Mar 23 09:06:31 opensuse103 kernel: sys_init_module: loading module anyway... Mar 23 09:06:31 opensuse103 kernel: Pid: 5323, comm: modprobe Not tainted 2.6.25-rc6-git7-default #1 Mar 23 09:06:31 opensuse103 kernel: [<c013c253>] sys_init_module+0x172b/0x17c9 Mar 23 09:06:31 opensuse103 kernel: [<c0108a6a>] sys_mmap2+0x62/0x77 Mar 23 09:06:31 opensuse103 kernel: [<c01059c4>] sysenter_past_esp+0x6d/0xa9 Mar 23 09:06:31 opensuse103 kernel: ======================= Cc: Latchesar Ionkov <lucho@ionkov.net> Cc: Eric Van Hensbergen <ericvh@opteron.(none)> Cc: David S. Miller <davem@davemloft.net> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: <devzero@web.de> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Dave Jones authored
Silence two kerneldoc warnings. Warning(kernel/audit.c:1276): No description found for parameter 'string' Warning(kernel/audit.c:1276): No description found for parameter 'len' [also fix a typo for bonus points] Signed-off-by:
Dave Jones <davej@codemonkey.org.uk> Acked-by:
Randy Dunlap <randy.dunlap@oracle.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by:
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Sven Schnelle authored
kafs doesn't check if the cell already exists - so if you do an echo "add newcell.org 1.2.3.4" >/proc/fs/afs/cells it will try to create this cell again. kobject will also complain about a double registration. To prevent such problems, return -EEXIST in that case. Signed-off-by:
Sven Schnelle <svens@stackframe.org> Signed-off-by:
David Howells <dhowells@redhat.com> Signed-off-by:
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David Howells authored
Add a MAINTAINERS record for AFS. Signed-off-by:
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Dmitri Monakhov authored
Current nobh_write_end() implementation ignore partial writes(copied < len) case if page was fully mapped and simply mark page as Uptodate, which is totally wrong because area [pos+copied, pos+len) wasn't updated explicitly in previous write_begin call. It simply contains garbage from pagecache and result in data leakage. #TEST_CASE_BEGIN: ~~~~~~~~~~~~~~~~ In fact issue triggered by classical testcase open("/mnt/test", O_RDWR|O_CREAT|O_TRUNC, 0666) = 3 ftruncate(3, 409600) = 0 writev(3, [{"a", 1}, {NULL, 4095}], 2) = 1 ##TESTCASE_SOURCE: ~~~~~~~~~~~~~~~~~ #include <stdio.h> #include <stdlib.h> #include <fcntl.h> #include <sys/uio.h> #include <sys/mman.h> #include <errno.h> int main(int argc, char **argv) { int fd, ret; void* p; struct iovec iov[2]; fd = open(argv[1], O_RDWR|O_CREAT|O_TRUNC, 0666); ftruncate(fd, 409600); iov[0].iov_base="a"; iov[0].iov_len=1; iov[1].iov_base=NULL; iov[1].iov_len=4096; ret = writev(fd, iov, sizeof(iov)/sizeof(struct iovec)); printf("writev = %d, err = %d\n", ret, errno); return 0; } ##TESTCASE RESULT: ~~~~~~~~~~~~~~~~~~ [root@ts63 ~]# mount | grep mnt2 /dev/mapper/test on /mnt2 type ext2 (rw,nobh) [root@ts63 ~]# /tmp/writev /mnt2/test writev = 1, err = 0 [root@ts63 ~]# hexdump -C /mnt2/test 00000000 61 65 62 6f 6f 74 00 00 f0 b9 b4 59 3a 00 00 00 |aeboot.....Y:...| 00000010 20 00 00 00 00 00 00 00 21 00 00 00 00 00 00 00 | .......!.......| 00000020 df df df df df df df df df df df df df df df df |................| 00000030 3a 00 00 00 2a 00 00 00 21 00 00 00 00 00 00 00 |:...*...!.......| 00000040 60 c0 8c 00 00 00 00 00 40 4a 8d 00 00 00 00 00 |`.......@J......| 00000050 00 00 00 00 00 00 00 00 41 00 00 00 00 00 00 00 |........A.......| 00000060 74 69 6d 65 20 64 64 20 69 66 3d 2f 64 65 76 2f |time dd if=/dev/| 00000070 6c 6f 6f 70 30 20 20 6f 66 3d 2f 64 65 76 2f 6e |loop0 of=/dev/n| skip.. 00000f50 00 00 00 00 00 00 00 00 31 00 00 00 00 00 00 00 |........1.......| 00000f60 6d 6b 66 73 2e 65 78 74 33 20 2f 64 65 76 2f 76 |mkfs.ext3 /dev/v| 00000f70 7a 76 67 2f 74 65 73 74 20 2d 62 34 30 39 36 00 |zvg/test -b4096.| 00000f80 a0 fe 8c 00 00 00 00 00 21 00 00 00 00 00 00 00 |........!.......| 00000f90 23 31 32 30 35 39 35 30 34 30 34 00 3a 00 00 00 |#1205950404.:...| 00000fa0 20 00 8d 00 00 00 00 00 21 00 00 00 00 00 00 00 | .......!.......| 00000fb0 d0 cf 8c 00 00 00 00 00 10 d0 8c 00 00 00 00 00 |................| 00000fc0 00 00 00 00 00 00 00 00 41 00 00 00 00 00 00 00 |........A.......| 00000fd0 6d 6f 75 6e 74 20 2f 64 65 76 2f 76 7a 76 67 2f |mount /dev/vzvg/| 00000fe0 74 65 73 74 20 20 2f 76 7a 20 2d 6f 20 64 61 74 |test /vz -o dat| 00000ff0 61 3d 77 72 69 74 65 62 61 63 6b 00 00 00 00 00 |a=writeback.....| 00001000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| As you can see file's page contains garbage from pagecache instead of zeros. #TEST_CASE_END Attached patch: - Add sanity check BUG_ON in order to prevent incorrect usage by caller, This is function invariant because page can has buffers and in no zero *fadata pointer at the same time. - Always attach buffers to page is it is partial write case. - Always switch back to generic_write_end if page has buffers. This is reasonable because if page already has buffer then generic_write_begin was called previously. Signed-off-by:Dmitri Monakhov <dmonakhov@openvz.org> Reviewed-by:
Nick Piggin <npiggin@suse.de> Cc: <stable@kernel.org> Signed-off-by:
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YAMAMOTO Takashi authored
Call mm_free_cgroup earlier. Otherwise a reference due to lazy mm switching can prevent cgroup removal. Signed-off-by:
YAMAMOTO Takashi <yamamoto@valinux.co.jp> Acked-by:
Balbir Singh <balbir@linux.vnet.ibm.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Paul Menage <menage@google.com> Signed-off-by:
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Jonathan Corbet authored
Discourage people from inappropriately using in_atomic() Signed-off-by:
Jonathan Corbet <corbet@lwn.net> Signed-off-by:
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Andrew Morton authored
drivers/char/drm/ati_pcigart.c: In function 'drm_ati_pcigart_init': drivers/char/drm/ati_pcigart.c:125: warning: format '%08X' expects type 'unsigned int', but argument 3 has type 'dma_addr_t' Cc: Dave Airlie <airlied@linux.ie> Cc: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by:
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Sebastian Siewior authored
This has been forgotten in commit f5bbdacc ("[MTD] NAND Modularize read function") and nobody compiled the driver. Signed-off-by:
Sebastian Siewior <bigeasy@linutronix.de> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Joern Engel <joern@wh.fh-wedel.de> Signed-off-by:
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Andrew Morton authored
I believe http://bugzilla.kernel.org/show_bug.cgi?id=10318 is a false positive. There's no way in which networking will be using highmem pages here, so it won't be taking the KM_USER0 kmap slot, so there's no point in performing these checks. Cc: Pawel Staszewski <pstaszewski@artcom.pl> Cc: Ingo Molnar <mingo@elte.hu> Acked-by:
Christoph Lameter <clameter@sgi.com> Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by:
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Roland Dreier authored
Because of a typo in iwch_accept_cr(), the cxgb3 connection handling code programs the hardware IRD (incoming RDMA read queue depth) with the value that is passed in for the ORD (outgoing RDMA read queue depth). In particular this means that if an application passes in IRD > 0 and ORD = 0 (which is a completely sane and valid thing to do for an app that expects only incoming RDMA read requests), then the hardware will end up programmed with IRD = 0 and the app will fail in a mysterious way. Fix this by using "ep->ird" instead of "ep->ord" in the intended place. Signed-off-by:
Roland Dreier <rolandd@cisco.com> Acked-by:
Steve Wise <swise@opengridcomputing.com> Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpcLinus Torvalds authored
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: [POWERPC] Fix missed hardware breakpoints across multiple threads
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Ingo Molnar authored
Revert commit 1192aeb9 ("ACPI: drivers/acpi: elide a non-zero test on a result that is never 0") because it turns out that thermal_cooling_device_register() does actually return NULL if CONFIG_THERMAL is turned off (then the routine turns into a dummy inline routine in the header files that returns NULL unconditionally). This was found with randconfig testing, causing a crash during bootup: initcall 0x78878534 ran for 13 msecs: acpi_button_init+0x0/0x51() Calling initcall 0x78878585: acpi_fan_init+0x0/0x2c() BUG: unable to handle kernel NULL pointer dereference at 00000000 IP: [<782b8ad0>] acpi_fan_add+0x7d/0xfd *pde = 00000000 Oops: 0000 [#1] Modules linked in: Pid: 1, comm: swapper Not tainted (2.6.25-rc7-sched-devel.git-x86-latest.git #14) EIP: 0060:[<782b8ad0>] EFLAGS: 00010246 CPU: 0 EIP is at acpi_fan_add+0x7d/0xfd EAX: b787c718 EBX: b787c400 ECX: b782ceb4 EDX: 00000007 ESI: 00000000 EDI: b787c6f4 EBP: b782cee0 ESP: b782cecc DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068 Process swapper (pid: 1, ti=b782c000 task=b7846000 task.ti=b782c000) Stack: b787c459 00000000 b787c400 78790888 b787c60c b782cef8 782b6fb8 ffffffda b787c60c 00000000 78790958 b782cf0c 783005d7 b787c60c 78790958 78790584 b782cf1c 783007f6 b782cf28 00000000 b782cf40 782ffc4a 78790958 b794d558 Call Trace: [<782b6fb8>] ? acpi_device_probe+0x3e/0xdb [<783005d7>] ? driver_probe_device+0x82/0xfc [<783007f6>] ? __driver_attach+0x3a/0x70 [<782ffc4a>] ? bus_for_each_dev+0x3e/0x60 [<7830048c>] ? driver_attach+0x14/0x16 [<783007bc>] ? __driver_attach+0x0/0x70 [<7830006a>] ? bus_add_driver+0x9d/0x1b0 [<783008c3>] ? driver_register+0x47/0xa3 [<7813db00>] ? timespec_to_ktime+0x9/0xc [<782b7331>] ? acpi_bus_register_driver+0x3a/0x3c [<78878592>] ? acpi_fan_init+0xd/0x2c [<78863656>] ? kernel_init+0xac/0x1f9 [<788635aa>] ? kernel_init+0x0/0x1f9 [<78114563>] ? kernel_thread_helper+0x7/0x10 ======================= Code: 6e 78 e8 57 44 e7 ff 58 e9 93 00 00 00 8b 55 f0 8d bb f4 02 00 00 80 4b 2d 10 8b 03 e8 87 cb ff ff 8d 83 18 03 00 00 80 63 2d ef <ff> 35 00 00 00 00 50 68 e8 9c 6e 78 e8 22 44 e7 ff b9 b6 9c 6e EIP: [<782b8ad0>] acpi_fan_add+0x7d/0xfd SS:ESP 0068:b782cecc ---[ end trace 778e504de7e3b1e3 ]--- Kernel panic - not syncing: Attempted to kill init! Signed-off-by:
Ingo Molnar <mingo@elte.hu> Acked-by:
Julia Lawall <julia@diku.dk> Signed-off-by:
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Michael Ellerman authored
There is a bug in the powerpc DABR (data access breakpoint) handling, which can result in us missing breakpoints if several threads are trying to break on the same address. The circumstances are that do_page_fault() calls do_dabr(), this clears the DABR (sets it to 0) and sets up the signal which will report to userspace that the DABR was hit. The do_signal() code will restore the DABR value on the way out to userspace. If we reschedule before calling do_signal(), __switch_to() will check the cached DABR value and compare it to the new thread's value, if they match we don't set the DABR in hardware. So if two threads have the same DABR value, and we schedule from one to the other after taking the interrupt for the first thread hitting the DABR, the second thread will run without the DABR set in hardware. The cleanest fix is to move the cache update into set_dabr(), that way we can't forget to do it. Reported-by:
Jan Kratochvil <jan.kratochvil@redhat.com> Signed-off-by:
Michael Ellerman <michael@ellerman.id.au> Signed-off-by:
Paul Mackerras <paulus@samba.org>
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Linus Torvalds authored
This reverts commit 3811dbf6. The masking was not at all useless, and it was sensible. We handle GFP_ZERO in the caller, and passing it down to any page allocator logic is buggy and wrong. Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linusLinus Torvalds authored
* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus: lguest: comment documentation update. lguest: Don't need comment terminator before disk section. lguest: lguest.txt documentation fix lguest: Add puppies which where previously missing. virtio_pci: unregister virtio device at device remove
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Rusty Russell authored
Took some cycles to re-read the Lguest Journey end-to-end, fix some rot and tighten some phrases. Only comments change. No new jokes, but a couple of recycled old jokes. Signed-off-by:Rusty Russell <rusty@rustcorp.com.au>
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Rusty Russell authored
Signed-off-by: -
Paul Bolle authored
Mention the config options for the Virtio drivers and move the Virtualization menu to the toplevel. Signed-off-by:
Paul Bolle <pebolle@tiscali.nl> Signed-off-by:
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Tim Ansell authored
lguest doesn't have features, it has puppies! Signed-off-by:
Timothy R Ansell <mithro@mithis.com> Signed-off-by:
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Anthony Liguori authored
Make sure to call unregister_virtio_device() when a virtio device is removed. Otherwise, virtio_pci.ko cannot be rmmod'd. This was spotted by Marcelo Tosatti. Signed-off-by:
Anthony Liguori <aliguori@us.ibm.com> Signed-off-by:
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- 27 Mar, 2008 19 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpcLinus Torvalds authored
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: [POWERPC] update pasemi_defconfig
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Ingo Molnar authored
Linus noticed a second bug and an uncleanliness: - we'd return on any instruction fetch fault - we'd use both the value of 16 and the PF_INSTR symbol which are the same and make no sense the cleanup nicely unifies this piece of logic. Signed-off-by: -
git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86Linus Torvalds authored
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86: xen: fix UP setup of shared_info xen: fix RMW when unmasking events x86, documentation: nmi_watchdog=2 works on x86_64 x86: stricter check in follow_huge_addr() rdc321x: GPIO routines bugfixes x86: ptrace.c: fix defined-but-unused warnings x86: fix prefetch workaround
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git://git.kernel.org/pub/scm/linux/kernel/git/hskinnemoen/avr32-2.6Linus Torvalds authored
* 'avr32-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/hskinnemoen/avr32-2.6: avr32: Fix bug in early resource allocation code avr32: Build fix for CONFIG_BUG=n avr32: Work around byteswap bug in gcc < 4.2
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Jeremy Fitzhardinge authored
We need to set up the shared_info pointer once we've mapped the real shared_info into its fixmap slot. That needs to happen once the general pagetable setup has been done. Previously, the UP shared_info was set up one in xen_start_kernel, but that was left pointing to the dummy shared info. Unfortunately there's no really good place to do a later setup of the shared_info in UP, so just do it once the pagetable setup has been done. [ Stable: needed in 2.6.24.x ] Signed-off-by:
Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: Stable Kernel <stable@kernel.org> Signed-off-by:
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Jeremy Fitzhardinge authored
xen_irq_enable_direct and xen_sysexit were using "andw $0x00ff, XEN_vcpu_info_pending(vcpu)" to unmask events and test for pending ones in one instuction. Unfortunately, the pending flag must be modified with a locked operation since it can be set by another CPU, and the unlocked form of this operation was causing the pending flag to get lost, allowing the processor to return to usermode with pending events and ultimately deadlock. The simple fix would be to make it a locked operation, but that's rather costly and unnecessary. The fix here is to split the mask-clearing and pending-testing into two instructions; the interrupt window between them is of no concern because either way pending or new events will be processed. This should fix lingering bugs in using direct vcpu structure access too. [ Stable: needed in 2.6.24.x ] Signed-off-by:
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Marcin Slusarz authored
Signed-off-by:
Marcin Slusarz <marcin.slusarz@gmail.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by:
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Christoph Lameter authored
The first page of the compound page is determined in follow_huge_addr() but then PageCompound() only checks if the page is part of a compound page. PageHead() allows checking if this is indeed the first page of the compound. Cc: Jeremy Fitzhardinge <jeremy@goop.org> Signed-off-by:
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Florian Fainelli authored
This patch fixes the use of GPIO routines which are in the PCI configuration space of the RDC321x, therefore reading/writing to this space without spinlock protection can be problematic. We also now request and free GPIOs and support the MGB100 board, previous code was very AR525W-centric. Signed-off-by:
Volker Weiss <volker@tintuc.de> Signed-off-by:
Florian Fainelli <florian.fainelli@telecomint.eu> Signed-off-by:
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Andrew Morton authored
arch/x86/kernel/ptrace.c:548: warning: 'ptrace_bts_get_size' defined but not used arch/x86/kernel/ptrace.c:558: warning: 'ptrace_bts_read_record' defined but not used arch/x86/kernel/ptrace.c:607: warning: 'ptrace_bts_clear' defined but not used arch/x86/kernel/ptrace.c:617: warning: 'ptrace_bts_drain' defined but not used arch/x86/kernel/ptrace.c:720: warning: 'ptrace_bts_config' defined but not used arch/x86/kernel/ptrace.c:788: warning: 'ptrace_bts_status' defined but not used Cc: Roland McGrath <roland@redhat.com> Signed-off-by:
Thomas Gleixner <tglx@linutronix.de>
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Ingo Molnar authored
some early Athlon XP's and Opterons generate bogus faults on prefetch instructions. The workaround for this regressed over .24 - reinstate it. Signed-off-by: -
git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6Linus Torvalds authored
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: ACPI: drivers/acpi: elide a non-zero test on a result that is never 0 pnpacpi: reduce printk severity for "pnpacpi: exceeded the max number of ..." cpuidle: fix 100% C0 statistics regression cpuidle: fix cpuidle time and usage overflow ACPI: fix mis-merge -- invoke acpi_unlazy_tlb() only on C3 entry ACPI: fix a regression of ACPI device driver autoloading ACPI: SBS: remove typo from sbchc.c
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Benjamin Herrenschmidt authored
The futex init function is called init(). This is a pain in the neck when debugging when you code dies in ... init :-) This renames it to futex_init(). Signed-off-by:
Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by:
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Haavard Skinnemoen authored
add_reserved_region() tries to keep the resource list sorted, so when looking for a place to insert the new resource, it may break out before the last entry. When this happens, the list is broken in two because the sibling field of the new entry doesn't point to the next resource. Fix it by updating the new resource's sibling field appropriately. Signed-off-by:Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
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Julia Lawall authored
The function thermal_cooling_device_register always returns either a valid pointer or a value made with ERR_PTR, so a test for non-zero on the result will always succeed. The problem was found using the following semantic match. (http://www.emn.fr/x-info/coccinelle/) //<smpl> @A@ expression E, E1; statement S,S1; position p; @@ E = thermal_cooling_device_register(...) ... when != E = E1 if@p (E) S else S1 @n@ position a.p; expression E,E1; statement S,S1; @@ E = NULL ... when != E = E1 if@p (E) S else S1 @depends on !n@ expression E; statement S,S1; position a.p; @@ * if@p (E) S else S1 //</smpl> Signed-off-by:
Len Brown <len.brown@intel.com>
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Len Brown authored
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git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6Linus Torvalds authored
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (43 commits) [IPSEC]: Fix BEET output [ICMP]: Dst entry leak in icmp_send host re-lookup code (v2). [AX25]: Remove obsolete references to BKL from TODO file. [NET]: Fix multicast device ioctl checks [IRDA]: Store irnet_socket termios properly. [UML]: uml-net: don't set IFF_ALLMULTI in set_multicast_list [VLAN]: Don't copy ALLMULTI/PROMISC flags from underlying device netxen, phy/marvell, skge: minor checkpatch fixes S2io: Handle TX completions on the same CPU as the sender for MIS-X interrupts b44: Truncate PHY address skge napi->poll() locking bug rndis_host: fix oops when query for OID_GEN_PHYSICAL_MEDIUM fails cxgb3: Fix lockdep problems with sge.reg_lock ehea: Fix IPv6 support dm9000: Support promisc and all-multi modes dm9601: configure MAC to drop invalid (crc/length) packets dm9601: add Hirose USB-100 device ID Marvell PHY m88e1111 driver fix netxen: fix rx dropped stats netxen: remove low level tx lock ...
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git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6Linus Torvalds authored
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6: [SPARC64]: Define TASK_SIZE_OF() [SPARC64]: flush_ptrace_access() needs preemption disable. [SPARC64]: Update defconfig. [SPARC64]: Fix allnoconfig build, ptrace.c missing CONFIG_COMPAT checks. [SPARC64]: Fix __get_cpu_var in preemption-enabled area. [SPARC64]: Fix sparse warnings in arch/sparc64/kernel/signal.c [SPARC64]: Fix most sparse warnings in arch/sparc64/kernel/sys_sparc.c [SPARC64]: Fix sparse warnings in arch/sparc64/kernel/time.c [SPARC64]: Fix sparse warnings in arch/sparc64/kernel/ptrace.c [SPARC64]: Fix sparse warnings in arch/sparc64/kernel/irq.c [SPARC64]: Fix sparse warnings in arch/sparc64/kernel/iommu.c [SPARC64]: Fix sparse errors in arch/sparc64/kernel/traps.c [SPARC64]: Fix sparse warnings in arch/sparc64/kernel/{cpu,setup}.c [SPARC64]: Adjust {TLBTEMP,TSBMAP}_BASE. [SPARC64]: Make save_stack_trace() more efficient.
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David S. Miller authored
This make "cat /proc/${PID}/pagemap" more efficient for 32-bit tasks. Based upon a report by Mariusz Kozlowski. Signed-off-by:David S. Miller <davem@davemloft.net>
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