- 19 Sep, 2007 37 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-schedLinus Torvalds authored
* git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched: sched: fix invalid sched_class use sched: add /proc/sys/kernel/sched_compat_yield
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Eric Paris authored
Given an illegal selinux option it was possible for match_token to work in random memory at the end of the match_table_t array. Note that privilege is required to perform a context mount, so this issue is effectively limited to root only. Signed-off-by:
Eric Paris <eparis@redhat.com> Acked-by:
Stephen Smalley <sds@tycho.nsa.gov> Signed-off-by:
James Morris <jmorris@namei.org>
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Hiroshi Shimamoto authored
When using rt_mutex, a NULL pointer dereference is occurred at enqueue_task_rt. Here is a scenario; 1) there are two threads, the thread A is fair_sched_class and thread B is rt_sched_class. 2) Thread A is boosted up to rt_sched_class, because the thread A has a rt_mutex lock and the thread B is waiting the lock. 3) At this time, when thread A create a new thread C, the thread C has a rt_sched_class. 4) When doing wake_up_new_task() for the thread C, the priority of the thread C is out of the RT priority range, because the normal priority of thread A is not the RT priority. It makes data corruption by overflowing the rt_prio_array. The new thread C should be fair_sched_class. The new thread should be valid scheduler class before queuing. This patch fixes to set the suitable scheduler class. Signed-off-by:
Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by:
Ingo Molnar <mingo@elte.hu> Signed-off-by:
Peter Zijlstra <a.p.zijlstra@chello.nl>
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Ingo Molnar authored
add /proc/sys/kernel/sched_compat_yield to make sys_sched_yield() more agressive, by moving the yielding task to the last position in the rbtree. with sched_compat_yield=0: PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 2539 mingo 20 0 1576 252 204 R 50 0.0 0:02.03 loop_yield 2541 mingo 20 0 1576 244 196 R 50 0.0 0:02.05 loop with sched_compat_yield=1: PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 2584 mingo 20 0 1576 248 196 R 99 0.0 0:52.45 loop 2582 mingo 20 0 1576 256 204 R 0 0.0 0:00.00 loop_yield Signed-off-by:
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git://ftp.linux-mips.org/pub/scm/upstream-linusLinus Torvalds authored
* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus: [MIPS] cpu-bugs64.c: GCC 3.3 constraint workaround [MIPS] DEC: Initialise ioasic_ssr_lock
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Linus Torvalds authored
* master.kernel.org:/pub/scm/linux/kernel/git/mchehab/v4l-dvb: V4L/DVB (6173a): Documentation: Remove reference to dead "cpia_pp=" boot-time option Revert "V4L/DVB (6173a): Documentation: Remove reference to dead "cpia_pp=" boot-time option"
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git://oss.sgi.com:8090/xfs/xfs-2.6Linus Torvalds authored
* 'for-linus' of git://oss.sgi.com:8090/xfs/xfs-2.6: [XFS] Avoid replaying inode buffer initialisation log items if on-disk version is newer. [XFS] Ensure file size updates have been completed before writing inode to disk. [XFS] On-demand reaping of the MRU cache
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Linus Torvalds authored
* master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6: [SUNSAB]: Fix several bugs.
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Linus Torvalds authored
* master.kernel.org:/pub/scm/linux/kernel/git/bart/ide-2.6: ide: remove unused variables from drivers/ide/ppc/pmac.c ide: ST320413A has the same problem as ST340823A
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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 timekeeping on PowerPC 601 [POWERPC] Don't expose clock vDSO functions when CPU has no timebase [POWERPC] spusched: Fix null pointer dereference in find_victim
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Linus Torvalds authored
Randy Dunlap noticed an interesting "crashme" behaviour on his dual Prescott Xeon setup, where he gets page faults with the error code having a zero "user" bit, but the register state points back to user mode. This may be a CPU microcode buglet triggered by some strange instruction pattern that crashme generates, and loading a microcode update seems to possibly have fixed it. Regardless, we really should trust the register state more than the error code, since it's really the register state that determines whether we can actually send a signal, or whether we're in kernel mode and need to oops/kill the process in the case of a page fault. Cc: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by:Linus Torvalds <torvalds@linux-foundation.org>
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Maciej W. Rozycki authored
Add a workaround to address warnings generated on the "n" constraint by GCC 3.3 and below. Signed-off-by:
Maciej W. Rozycki <macro@linux-mips.org> Signed-off-by:
Ralf Baechle <ralf@linux-mips.org>
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Maciej W. Rozycki authored
Fix the definition of the ioasic_ssr_lock spinlock to include a proper initialisation. Signed-off-by:
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Dmitry Torokhov authored
Nested class devices used to have 'device' symlink point to a real (physical) device instead of a parent class device. When converting subsystems to struct device we need to keep doing what class devices did if CONFIG_SYSFS_DEPRECATED is Y, otherwise parts of udev break. Signed-off-by:
Dmitry Torokhov <dtor@mail.ru> Cc: Kay Sievers <kay.sievers@vrfy.org> Acked-by:
Greg KH <greg@kroah.com> Tested-by:
Anssi Hannula <anssi.hannula@gmail.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
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Jeff Dike authored
This patch fixes a crash caused by an interrupt coming in when an IRQ stack is being torn down. When this happens, handle_signal will loop, setting up the IRQ stack again because the tearing down had finished, and handling whatever signals had come in. However, to_irq_stack returns a mask of pending signals to be handled, plus bit zero is set if the IRQ stack was already active, and thus shouldn't be torn down. This causes a problem because when handle_signal goes around the loop, sig will be zero, and to_irq_stack will duly set bit zero in the returned mask, faking handle_signal into believing that it shouldn't tear down the IRQ stack and return thread_info pointers back to their original values. This will eventually cause a crash, as the IRQ stack thread_info will continue pointing to the original task_struct and an interrupt will look into it after it has been freed. The fix is to stop passing a signal number into to_irq_stack. Rather, the pending signals mask is initialized beforehand with the bit for sig already set. References to sig in to_irq_stack can be replaced with references to the mask. [akpm@linux-foundation.org: use UL] Signed-off-by:
Jeff Dike <jdike@linux.intel.com> Signed-off-by:
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Lee Schermerhorn authored
This patch proposes fixes to the reference counting of memory policy in the page allocation paths and in show_numa_map(). Extracted from my "Memory Policy Cleanups and Enhancements" series as stand-alone. Shared policy lookup [shmem] has always added a reference to the policy, but this was never unrefed after page allocation or after formatting the numa map data. Default system policy should not require additional ref counting, nor should the current task's task policy. However, show_numa_map() calls get_vma_policy() to examine what may be [likely is] another task's policy. The latter case needs protection against freeing of the policy. This patch adds a reference count to a mempolicy returned by get_vma_policy() when the policy is a vma policy or another task's mempolicy. Again, shared policy is already reference counted on lookup. A matching "unref" [__mpol_free()] is performed in alloc_page_vma() for shared and vma policies, and in show_numa_map() for shared and another task's mempolicy. We can call __mpol_free() directly, saving an admittedly inexpensive inline NULL test, because we know we have a non-NULL policy. Handling policy ref counts for hugepages is a bit trickier. huge_zonelist() returns a zone list that might come from a shared or vma 'BIND policy. In this case, we should hold the reference until after the huge page allocation in dequeue_hugepage(). The patch modifies huge_zonelist() to return a pointer to the mempolicy if it needs to be unref'd after allocation. Kernel Build [16cpu, 32GB, ia64] - average of 10 runs: w/o patch w/ refcount patch Avg Std Devn Avg Std Devn Real: 100.59 0.38 100.63 0.43 User: 1209.60 0.37 1209.91 0.31 System: 81.52 0.42 81.64 0.34 Signed-off-by:
Lee Schermerhorn <lee.schermerhorn@hp.com> Acked-by:
Andi Kleen <ak@suse.de> Cc: Christoph Lameter <clameter@sgi.com> Acked-by:
Mel Gorman <mel@csn.ul.ie> Signed-off-by:
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Pavel Emelyanov authored
It turned out, that the user namespace is released during the do_exit() in exit_task_namespaces(), but the struct user_struct is released only during the put_task_struct(), i.e. MUCH later. On debug kernels with poisoned slabs this will cause the oops in uid_hash_remove() because the head of the chain, which resides inside the struct user_namespace, will be already freed and poisoned. Since the uid hash itself is required only when someone can search it, i.e. when the namespace is alive, we can safely unhash all the user_struct-s from it during the namespace exiting. The subsequent free_uid() will complete the user_struct destruction. For example simple program #include <sched.h> char stack[2 * 1024 * 1024]; int f(void *foo) { return 0; } int main(void) { clone(f, stack + 1 * 1024 * 1024, 0x10000000, 0); return 0; } run on kernel with CONFIG_USER_NS turned on will oops the kernel immediately. This was spotted during OpenVZ kernel testing. Signed-off-by:Pavel Emelyanov <xemul@openvz.org> Signed-off-by:
Alexey Dobriyan <adobriyan@openvz.org> Acked-by:
"Serge E. Hallyn" <serue@us.ibm.com> Signed-off-by:
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Pavel Emelyanov authored
Surprisingly, but (spotted by Alexey Dobriyan) the uid hash still uses list_heads, thus occupying twice as much place as it could. Convert it to hlist_heads. Signed-off-by:
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Matthias Kaehlcke authored
kernel/user.c: Convert list_for_each to list_for_each_entry in uid_hash_find() Signed-off-by:
Matthias Kaehlcke <matthias.kaehlcke@gmail.com> Signed-off-by:
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Eric Sandeen authored
The do_split() function for htree dir blocks is intended to split a leaf block to make room for a new entry. It sorts the entries in the original block by hash value, then moves the last half of the entries to the new block - without accounting for how much space this actually moves. (IOW, it moves half of the entry *count* not half of the entry *space*). If by chance we have both large & small entries, and we move only the smallest entries, and we have a large new entry to insert, we may not have created enough space for it. The patch below stores each record size when calculating the dx_map, and then walks the hash-sorted dx_map, calculating how many entries must be moved to more evenly split the existing entries between the old block and the new block, guaranteeing enough space for the new entry. The dx_map "offs" member is reduced to u16 so that the overall map size does not change - it is temporarily stored at the end of the new block, and if it grows too large it may be overwritten. By making offs and size both u16, we won't grow the map size. Also add a few comments to the functions involved. This fixes the testcase reported by hooanon05@yahoo.co.jp on the linux-ext4 list, "ext3 dir_index causes an error" Thanks to Andreas Dilger for discussing the problem & solution with me. Signed-off-by:
Eric Sandeen <sandeen@redhat.com> Signed-off-by:
Andreas Dilger <adilger@clusterfs.com> Tested-by:
Junjiro Okajima <hooanon05@yahoo.co.jp> Cc: Theodore Ts'o <tytso@mit.edu> Cc: <linux-ext4@vger.kernel.org> Cc: <stable@kernel.org> Signed-off-by:
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Andrew Morton authored
There is still some confusion and disagreement over what this interface should actually do. So it is best that we disable it in 2.6.23 until we get that fully sorted out. (sys_timerfd() was present in 2.6.22 but it was apparently broken, so here we assume that nobody is using it yet). Cc: Michael Kerrisk <mtk-manpages@gmx.net> Cc: Davide Libenzi <davidel@xmailserver.org> Acked-by:
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Alexey Dobriyan authored
NFS unregisters sysctls only if V4 support is compiled in. However, sysctl table is not V4 specific, so unregister it always. Steps to reproduce: [build nfs.ko with CONFIG_NFS_V4=n] modrobe nfs rmmod nfs ls /proc/sys Unable to handle kernel paging request at ffffffff880661c0 RIP: [<ffffffff802af8e3>] proc_sys_readdir+0xd3/0x350 PGD 203067 PUD 207063 PMD 7e216067 PTE 0 Oops: 0000 [1] SMP CPU 1 Modules linked in: lockd nfs_acl sunrpc Pid: 3335, comm: ls Not tainted 2.6.23-rc3-bloat #2 RIP: 0010:[<ffffffff802af8e3>] [<ffffffff802af8e3>] proc_sys_readdir+0xd3/0x350 RSP: 0018:ffff81007fd93e78 EFLAGS: 00010286 RAX: ffffffff880661c0 RBX: ffffffff80466370 RCX: ffffffff880661c0 RDX: 00000000000014c0 RSI: ffff81007f3ad020 RDI: ffff81007efd8b40 RBP: 0000000000000018 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: ffffffff802a8570 R12: ffffffff880661c0 R13: ffff81007e219640 R14: ffff81007efd8b40 R15: ffff81007ded7280 FS: 00002ba25ef03060(0000) GS:ffff81007ff81258(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: ffffffff880661c0 CR3: 000000007dfaf000 CR4: 00000000000006e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process ls (pid: 3335, threadinfo ffff81007fd92000, task ffff81007d8a0000) Stack: ffff81007f3ad150 ffffffff80283f30 ffff81007fd93f48 ffff81007efd8b40 ffff81007ee00440 0000000422222222 0000000200035593 ffffffff88037e9a 2222222222222222 ffffffff80466500 ffff81007e416400 ffff81007e219640 Call Trace: [<ffffffff80283f30>] filldir+0x0/0xf0 [<ffffffff80283f30>] filldir+0x0/0xf0 [<ffffffff802840c7>] vfs_readdir+0xa7/0xc0 [<ffffffff80284376>] sys_getdents+0x96/0xe0 [<ffffffff8020bb3e>] system_call+0x7e/0x83 Code: 41 8b 14 24 85 d2 74 dc 49 8b 44 24 08 48 85 c0 74 e7 49 3b RIP [<ffffffff802af8e3>] proc_sys_readdir+0xd3/0x350 RSP <ffff81007fd93e78> CR2: ffffffff880661c0 Kernel panic - not syncing: Fatal exception Signed-off-by:
Alexey Dobriyan <adobriyan@gmail.com> Acked-by:
Trond Myklebust <trond.myklebust@fys.uio.no> Cc: "J. Bruce Fields" <bfields@fieldses.org> Cc: <stable@kernel.org> Signed-off-by:
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Eric Sandeen authored
Convert asserts (BUGs) in dx_probe from bad on-disk data to recoverable errors with helpful warnings. With help catching other asserts from Duane Griffin <duaneg@dghda.com> Signed-off-by:
Duane Griffin <duaneg@dghda.com> Acked-by:
Theodore Ts'o <tytso@mit.edu> Cc: <stable@kernel.org> Signed-off-by:
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Dave Airlie authored
The mask on i830 should be 0x70 always, later chips 0xF0 should be okay. Signed-off-by:
Dave Airlie <airlied@linux.ie> Acked-by:
Zhenyu Wang <zhenyu.z.wang@intel.com> Cc: Michael Haas <laga@laga.ath.cx> Signed-off-by:
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Antonino A. Daplas authored
Reported in Kernel Bugzilla 9006 Fix an obvious bug in DPLL disable. Signed-off-by:
Antonino Daplas <adaplas@gmail.com> Signed-off-by:
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Jeremy Fitzhardinge authored
Xen ignores all updates to cr4, and some versions will kill the domain if you try to change its value. Just ignore all changes. Signed-off-by:
Jeremy Fitzhardinge <jeremy@xensource.com> Cc: Andi Kleen <ak@suse.de> Signed-off-by:
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Kees Cook authored
Fix a couple drivers that do not correctly terminate their pci_device_id lists. This results in garbage being spewed into modules.pcimap when the module happens to not have 28 NULL bytes following the table, and/or the last PCI ID is actually truncated from the table when calculating the modules.alias PCI aliases, cause those unfortunate device IDs to not auto-load. Signed-off-by:
Kees Cook <kees@ubuntu.com> Acked-by:
Corey Minyard <minyard@acm.org> Cc: David Woodhouse <dwmw2@infradead.org> Acked-by:
Jeff Garzik <jeff@garzik.org> Cc: Greg KH <greg@kroah.com> Signed-off-by:
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Cliff Wickman authored
The shrinking of a virtual memory area that is mmap(2)'d to a memory special file (device drivers/char/mspec.c) can cause a panic. If the mapped size of the vma (vm_area_struct) is very large, mspec allocates a large vma_data structure with vmalloc(). But such a vma can be shrunk by an munmap(2). The current driver uses the current size of each vma to deduce whether its vma_data structure was allocated by kmalloc() or vmalloc(). So if the vma was shrunk it appears to have been allocated by kmalloc(), and mspec attempts to free it with kfree(). This results in a panic. This patch avoids the panic (by preserving the type of the allocation) and also makes mspec work correctly as the vma is split into pieces by the munmap(2)'s. All vma's derived from such a split vma share the same vma_data structure that represents all the pages mapped into this set of vma's. The mpec driver must be made capable of using the right portion of the structure for each member vma. In other words, it must index into the array of page addresses using the portion of the array that represents the current vma. This is enabled by storing the vma group's vm_start in the vma_data structure. The shared vma_data's are not protected by mm->mmap_sem in the fork() case so the reference count is left as atomic_t. Signed-off-by:
Cliff Wickman <cpw@sgi.com> Acked-by:
Jes Sorensen <jes@sgi.com> Signed-off-by:
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Atsushi Nemoto authored
Currently the rtc driver, rtc-ds1552.c uses an unsigned long to store the base mmio address of the NVRAM/RTC. This breaks on 32-bit systems with larger physical addresses. Signed-off-by:
Atsushi Nemoto <anemo@mba.ocn.ne.jp> Cc: David Brownell <david-b@pacbell.net> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by:
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David Gibson authored
Currently the rtc driver, rtc-ds1742.c uses an unsigned long to store the base mmio address of the NVRAM/RTC. This breaks on systems like PowerPC 440, which is a 32-bit core with 36-bit physical addresses: IO on the system, including the RTC, is typically above the 4GB point, and cannot fit into an unsigned long. This patch fixes the problem by replacing the unsigned long with a resource_size_t. Tested on Ebony (PPC440) (with additional patches to instantiate the ds1742 platform device appropriately). Signed-off-by:
David Gibson <david@gibson.dropbear.id.au> Acked-by:
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Alexey Dobriyan authored
struct utsname is copied from master one without any exclusion. Here is sample output from one proggie doing sethostname("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"); sethostname("bbbbbbbbbbbbbbbbbbbbbbbbbbbbbb"); and another clone(,, CLONE_NEWUTS, ...) uname() hostname = 'aaaaaaaaaaaaaaaaaaaaaaaaabbbbb' hostname = 'bbbaaaaaaaaaaaaaaaaaaaaaaaaaaa' hostname = 'aaaaaaaabbbbbbbbbbbbbbbbbbbbbb' hostname = 'aaaaaaaaaaaaaaaaaaaaaaaaaabbbb' hostname = 'aaaaaaaaaaaaaaaaaaaaaaaaaaaabb' hostname = 'aaabbbbbbbbbbbbbbbbbbbbbbbbbbb' hostname = 'bbbbbbbbbbbbbbbbaaaaaaaaaaaaaa' Hostname is sometimes corrupted. Yes, even _the_ simplest namespace activity had bug in it. :-( Signed-off-by:Alexey Dobriyan <adobriyan@sw.ru> Acked-by:
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Nigel Cunningham authored
Commit 83144186 (Freezer: make kernel threads nonfreezable by default) breaks freezing when attempting to resume from an initrd, because the init (which is freezeable) spins while waiting for another thread to run /linuxrc, but doesn't check whether it has been told to enter the refrigerator. The original patch replaced a call to try_to_freeze() with a call to yield(). I believe a simple reversion is wrong because if !CONFIG_PM_SLEEP, try_to_freeze() is a noop. It should still yield. Signed-off-by:
Nigel Cunningham <nigel@nigel.suspend2.net> Acked-by:
Rafael J. Wysocki <rjw@sisk.pl> Acked-by:
Pavel Machek <pavel@ucw.cz> Signed-off-by:
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Nicolas George authored
I found a type mismatch in UML that makes host block devices unusable as ubd devices on x86_64 and other 64 bits systems (segfault of the mm subsystem): In block/ioctl.c, the following lines show that the BLKGETSIZE ioctl expects a pointer to a long: case BLKGETSIZE: if ((bdev->bd_inode->i_size >> 9) > ~0UL) return -EFBIG; return put_ulong(arg, bdev->bd_inode->i_size >> 9); In arch/um/os-Linux/file.c, os_file_size calls it with an int. The ioctl_list man page should be fixed as well. Cc: Jeff Dike <jdike@addtoit.com> Signed-off-by:
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Andrew Morton authored
sparc32: drivers/block/DAC960.c: In function 'DAC960_V1_EnableMemoryMailboxInterface': drivers/block/DAC960.c:1168: error: 'DMA_32BIT_MASK' undeclared (first use in this function) drivers/block/DAC960.c:1168: error: (Each undeclared identifier is reported only Cc: <dac@conglom-o.org> Cc: <stable@kernel.org> Cc: Alessandro Polverini <alex@nibbles.it> Cc: Jeff Garzik <jeff@garzik.org> Cc: Matthew Wilcox <matthew@wil.cx> Signed-off-by:
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Benjamin Herrenschmidt authored
Recent changes to the timekeeping code broke support for the PowerPC 601 processor which doesn't have the usual timebase facility but a slightly different thing called (yuck) the RTC. This fixes it, boot tested on an old 601 based PowerMac 7200. Signed-off-by:
Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by:
Paul Mackerras <paulus@samba.org>
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Benjamin Herrenschmidt authored
We forgot to remove the clock_gettime, clock_getres and get_tbfreq vDSO calls on CPUs that have no timebase such as 601 or 403 (old CPUs that have different mechanisms and for which the vDSO code will not work properly). This fixes it. Signed-off-by:
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Christoph Hellwig authored
find_victim can dereference a NULL pointer when iterating over the list of victim spus because list_mutex only guarantees spu->ct to be stable, but of course not to be non-NULL. Also fix find_victim to not call spu_unbind_context without list_mutex because that violates the above guarantee. Signed-off-by:
Christoph Hellwig <hch@lst.de> Signed-off-by:
Arnd Bergmann <arnd.bergmann@de.ibm.com> Signed-off-by:
Jeremy Kerr <jk@ozlabs.org> Signed-off-by:
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- 18 Sep, 2007 2 commits
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Lachlan McIlroy authored
SGI-PV: 969656 SGI-Modid: xfs-linux-melb:xfs-kern:29676a Signed-off-by:
Lachlan McIlroy <lachlan@sgi.com> Signed-off-by:
David Chinner <dgc@sgi.com> Signed-off-by:
Tim Shimmin <tes@sgi.com>
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Lachlan McIlroy authored
SGI-PV: 968767 SGI-Modid: xfs-linux-melb:xfs-kern:29675a Signed-off-by:
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- 17 Sep, 2007 1 commit
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Al Viro authored
* don't register irq until ->startup() (and release in ->shutdown()). That avoids oopsen with the current tree when interrupt comes before we'd set up the data structures for ttyb. * handle console=ttyS... even when OBP talks to screen/keyboard * register irq handler for each port, let kernel/irq/handle.c call it for both if needed. Kills code duplication in sunsab_interrupt(). BTW, there'd been bitrot in it - ttya handling had stopped calling check_status() on BRK (correctly), ttyb copy of that code had kept the bogus call in that case. Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk> Signed-off-by:
David S. Miller <davem@davemloft.net>
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