- 02 Sep, 2006 1 commit
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George G. Davis authored
Patch from George G. Davis Resolve ARM1136 VIPT non-aliasing cache coherency issues observed when using ptrace to set breakpoints and cleanup copy_{to,from}_user_page() while we're here as requested by Russell King because "it's also far too heavy on non-v6 CPUs". NOTES: 1. Only access_process_vm() calls copy_{to,from}_user_page(). 2. access_process_vm() calls get_user_pages() to pin down the "page". 3. get_user_pages() calls flush_dcache_page(page) which ensures cache coherency between kernel and userspace mappings of "page". However flush_dcache_page(page) may not invalidate I-Cache over this range for all cases, specifically, I-Cache is not invalidated for the VIPT non-aliasing case. So memory is consistent between kernel and user space mappings of "page" but I-Cache may still be hot over this range. IOW, we don't have to worry about flush_cache_page() before memcpy(). 4. Now, for the copy_to_user_page() case, after memcpy(), we must flush the caches so memory is consistent with kernel cache entries and invalidate the I-Cache if this mm region is executable. We don't need to do anything after memcpy() for the copy_from_user_page() case since kernel cache entries will be invalidated via the same process above if we access "page" again. The flush_ptrace_access() function (borrowed from SPARC64 implementation) is added to handle cache flushing after memcpy() for the copy_to_user_page() case. Signed-off-by:George G. Davis <gdavis@mvista.com> Signed-off-by:
Russell King <rmk+kernel@arm.linux.org.uk>
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- 31 Aug, 2006 4 commits
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Ben Dooks authored
Patch from Ben Dooks Cleanup for include/asm-arma/arch-s3c2410/dma.h, by using tab characters to indent items, remove the now un-necessary changelog, and update the copyright information. Signed-off-by:
Ben Dooks <ben-linux@fluff.org> Signed-off-by:
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Ben Dooks authored
Patch from Ben Dooks The type naming in the s3c24xx dma code is riddled with typedefs creating _t types, from the code import from 2.4 which is contrary to the current Kernel coding style. This patch cleans this up, removing the typedefs and and fixing up the resultant code changes. Signed-off-by:
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David Brownell authored
Patch from David Brownell This adds RTC support to the csb337 default config. Both the AT91 and the ds1307 RTCs are enabled (rtc0 and rtc1 respectively). The ds1307 is used to initialize the system time, since it's battery-backed. From then on the AT91 RTC is used, since it's more capable (with both alarm and update irqs, and system wakeup capability) even though it needs manual initialization (symlink /dev/rtc to /dev/rtc0 for older versions of hwclock, then "hwclock --systohc") in an rc script or from inittab. Signed-off-by:
David Brownell <dbrownell@users.sourceforge.net> Signed-off-by:
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Russell King authored
Matthew Wilcox pointed out that the generic implementation of this is unfit for use. Here's an ARM optimised version instead. Signed-off-by:
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- 30 Aug, 2006 1 commit
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Daniel Jacobowitz authored
Patch from Daniel Jacobowitz vfp_put_double didn't work in a CONFIG_AEABI kernel. By swapping the arguments, we arrange for them to be in the same place regardless of ABI. I made the same change to vfp_put_float for consistency. Signed-off-by:
Daniel Jacobowitz <dan@codesourcery.com> Signed-off-by:
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- 29 Aug, 2006 3 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6Linus Torvalds authored
* git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6: [CIFS] Do not send Query All EAs SMB when mount option nouser_xattr [CIFS] endian errors in lanman protocol support [CIFS] Fix oops in cifs_close due to unitialized lock sem and list in [CIFS] Fix oops when negotiating lanman and no password specified [CIFS] [CIFS] Allow cifsd to suspend if connection is lost [CIFS] Make midState usage more consistent [CIFS] spinlock protect read of last srv response time in timeout path [CIFS] Do not time out posix brl requests when using new posix setfileinfo
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Linus Torvalds authored
* master.kernel.org:/home/rmk/linux-2.6-serial: [SERIAL] Support for Intashield 2 port PCI serial card
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Linus Torvalds authored
* master.kernel.org:/home/rmk/linux-2.6-arm: [ARM] 3761/1: fix armv4t breakage after adding thumb interworking to userspace helpers [ARM] Add Integrator support for glibc outb() and friends [ARM] Move prototype for register_isa_ports to asm/io.h [ARM] Arrange for isa.c to use named initialisers [ARM] 3741/1: remove sa1111.c build warning on non-sa1100 systems [ARM] 3760/1: This patch adds timeouts while working with SSP registers. Such timeouts were en [ARM] 3758/1: Preserve signalling NaNs in conversion [ARM] 3749/3: Correct VFP single/double conversion emulation [ARM] 3748/3: Correct error check in vfp_raise_exceptions
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- 28 Aug, 2006 5 commits
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Lennert Buytenhek authored
Patch from Lennert Buytenhek On armv4t systems, we have always compiled the kernel with -march=armv4 instead of -march=armv4t, which means that any use of bx will bomb out. Commit ba9b5d76 introduced the use of bx in the kernel, which means we need to compile with -march=armv4t on armv4t systems now. Signed-off-by:
Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by:
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Russell King authored
Add the necessary call to register_isa_ports() so that glibc knows where these are found on Integrator platforms. Signed-off-by: -
Russell King authored
Signed-off-by: -
Russell King authored
Convert isa.c (the glibc interface for emulating ISA IO) to use named initialisers. Signed-off-by: -
Linus Torvalds authored
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- 27 Aug, 2006 26 commits
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Alan Cox authored
Unlike the other tty comment patch this one has code changes. Specifically it limits the queue size for a tty to 64K characters (128Kbytes) worst case even if the tty is ignoring tty->throttle. This is because certain drivers don't honour the throttle value correctly, although it is a useful safeguard anyway. Signed-off-by:
Alan Cox <alan@redhat.com> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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Alan Cox authored
Doesn't fix them but does show up some interesting areas that need review and fixing. Signed-off-by:
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Randy Dunlap authored
Fix printk format warning: drivers/cdrom/gscd.c:269: warning: format â%luâ expects type âlong unsigned intâ, but argument 2 has type âunsigned intâ Signed-off-by:
Randy Dunlap <rdunlap@xenotime.net> Cc: Jens Axboe <axboe@suse.de> Signed-off-by:
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KAMEZAWA Hiroyuki authored
When we select NUMA with i386, the system is only X86_NUMAQ or using ACPI. Signed-off-by:
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by:
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Andrew Morton authored
None of the other /proc/meminfo lines have a space in the identifier. This post-2.6.17 addition has the potential to break existing parsers, so use an underscore instead (like Committed_AS). Cc: Christoph Lameter <clameter@engr.sgi.com> Signed-off-by:
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Dave Jones authored
This fixes the locking error noticed by lockdep: ============================================= [ INFO: possible recursive locking detected ] --------------------------------------------- init/1 is trying to acquire lock: (&sighand->siglock){....}, at: [<c047a78a>] flush_old_exec+0x3ae/0x859 but task is already holding lock: (&sighand->siglock){....}, at: [<c047a77a>] flush_old_exec+0x39e/0x859 other info that might help us debug this: 2 locks held by init/1: #0: (tasklist_lock){..--}, at: [<c047a76a>] flush_old_exec+0x38e/0x859 #1: (&sighand->siglock){....}, at: [<c047a77a>] flush_old_exec+0x39e/0x859 stack backtrace: [<c04051e1>] show_trace_log_lvl+0x54/0xfd [<c040579d>] show_trace+0xd/0x10 [<c04058b6>] dump_stack+0x19/0x1b [<c043b33a>] __lock_acquire+0x773/0x997 [<c043bacf>] lock_acquire+0x4b/0x6c [<c060630b>] _spin_lock+0x19/0x28 [<c047a78a>] flush_old_exec+0x3ae/0x859 [<c0498053>] load_elf_binary+0x4aa/0x1628 [<c0479cab>] search_binary_handler+0xa7/0x24e [<c047b577>] do_execve+0x15b/0x1f9 [<c04022b4>] sys_execve+0x29/0x4d [<c0403faf>] syscall_call+0x7/0xb Signed-off-by:Arjan van de Ven <arjan@infradead.org> Signed-off-by:
Dave Jones <davej@redhat.com> Signed-off-by:
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Ingo Molnar authored
reiserfs seems to have another locking level layer for the i_mutex due to the xattrs-are-a-directory thing. Signed-off-by:
Ingo Molnar <mingo@elte.hu> Signed-off-by:
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Ingo Molnar authored
idescsi_pc_intr() uses local_irq_enable() in IRQ context: annotate it. (this has no effect on kernels with lockdep disabled. On kernels with lockdep enabled this means that we wont actually disable interrupts, and the warning message will go away as well.) Signed-off-by:
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KAMEZAWA Hiroyuki authored
In file included from include/asm/mmzone.h:18, from include/linux/mmzone.h:439, <snip> include/asm/srat.h:31:2: error: #error CONFIG_ACPI_SRAT not defined, and srat.h header has been included make[1]: *** [arch/i386/kernel/asm-offsets.s] Error 1 This can happen with CONFIG_NUMA && !CONFIG_ACPI && !CONFIG_X86_NUMAQ Signed-off-by: -
Nick Piggin authored
cpuset_excl_nodes_overlap always returns 0 if current is exiting. This caused customer's systems to panic in the OOM killer when processes were having trouble getting memory for the final put_user in mm_release. Even though there were lots of processes to kill. Change to returning 1 in this case. This achieves parity with !CONFIG_CPUSETS case, and was observed to fix the problem. Signed-off-by:
Nick Piggin <npiggin@suse.de> Acked-by:
Paul Jackson <pj@sgi.com> Signed-off-by:
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KAMEZAWA Hiroyuki authored
register_one_node()'s should be defined under CONFIG_NUMA=n. fixes following bug. CC init/version.o LD init/built-in.o LD .tmp_vmlinux1 mm/built-in.o: In function `add_memory': undefined reference to `register_one_node' Signed-off-by:
Yasunori Goto <y-goto@jp.fujitsu.com> Signed-off-by:
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Badari Pulavarty authored
JBD currently allocates commit and frozen buffers from slabs. With CONFIG_SLAB_DEBUG, its possible for an allocation to cross the page boundary causing IO problems. https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=200127 So, instead of allocating these from regular slabs - manage allocation from its own slabs and disable slab debug for these slabs. [akpm@osdl.org: cleanups] Signed-off-by:
Badari Pulavarty <pbadari@us.ibm.com> Signed-off-by:
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Paul Jackson authored
Change the list of cpus allowed to tasks in the top (root) cpuset to dynamically track what cpus are online, using a CPU hotplug notifier. Make this top cpus file read-only. On systems that have cpusets configured in their kernel, but that aren't actively using cpusets (for some distros, this covers the majority of systems) all tasks end up in the top cpuset. If that system does support CPU hotplug, then these tasks cannot make use of CPUs that are added after system boot, because the CPUs are not allowed in the top cpuset. This is a surprising regression over earlier kernels that didn't have cpusets enabled. In order to keep the behaviour of cpusets consistent between systems actively making use of them and systems not using them, this patch changes the behaviour of the 'cpus' file in the top (root) cpuset, making it read only, and making it automatically track the value of cpu_online_map. Thus tasks in the top cpuset will have automatic use of hot plugged CPUs allowed by their cpuset. Thanks to Anton Blanchard and Nathan Lynch for reporting this problem, driving the fix, and earlier versions of this patch. Signed-off-by:
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NeilBrown authored
A recent patch broke the ability to do a user-request check of a raid1. This patch fixes the breakage and also moves a comment that was dislocated by the same patch. Signed-off-by:
Neil Brown <neilb@suse.de> Signed-off-by:
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NeilBrown authored
If we - shut down a clean array, - restart with one (or more) drive(s) missing - make some changes - pause, so that they array gets marked 'clean', the event count on the superblock of included drives will be the same as that of the removed drives. So adding the removed drive back in will cause it to be included with no resync. To avoid this, we only update the eventcount backwards when the array is not degraded. In this case there can (should) be no non-connected drives that we can get confused with, and this is the particular case where updating-backwards is valuable. Signed-off-by:
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Masoud Asgharifard Sharbiani authored
Fix two compile failures in eventpoll.c code which would happen if DEBUG_EPOLL is bigger than zero. Signed-off-by:
Masoud Sharbiani <masouds@google.com> Cc: Davide Libenzi <davidel@xmailserver.org> Signed-off-by:
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Tom Zanussi authored
Here's updated documentation for the relay interface, rewritten to match the relayfs->relay changes. It also moves relayfs.txt to relay.txt in the process. It includes the changes to relayfs.txt previously posted by Randy Dunlap, thanks for those. The relay-apps examples have also been updated to match, and can be found on the sourceforge relayfs website. Signed-off-by:
Tom Zanussi <zanussi@us.ibm.com> Cc: "Randy.Dunlap" <rdunlap@xenotime.net> Signed-off-by:
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Yingchao Zhou authored
An up() is called in kernel/stop_machine.c on failure, and also in the caller (unconditionally). Signed-off-by:
Zhou Yingchao <yingchao.zhou@gmail.com> Cc: <stable@kernel.org> Signed-off-by:
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Evgeniy Dushistov authored
1) When we allocated last fragment in ufs_truncate, we read page, check if block mapped to address, and if not trying to allocate it. This is wrong behaviour, fragment may be NOT allocated, but mapped, this happened because of "block map" function not checked allocated fragment or not, it just take address of the first fragment in the block, add offset of fragment and return result, this is correct behaviour in almost all situation except call from ufs_truncate. 2) Almost all implementation of UFS, which I can investigate have such "defect": if you have full disk, and try truncate file, for example 3GB to 2MB, and have hole in this region, truncate return -ENOSPC. I tried evade from this problem, but "block allocation" algorithm is tied to right value of i_lastfrag, and fix of this corner case may slow down of ordinaries scenarios, so this patch makes behavior of "truncate" operations similar to what other UFS implementations do. Signed-off-by:
Evgeniy Dushistov <dushistov@mail.ru> Signed-off-by:
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Evgeniy Dushistov authored
On UFS, this scenario: open(O_TRUNC) lseek(1024 * 1024 * 80) write("A") lseek(1024 * 2) write("A") may cause access to invalid address. This happened because of "goal" is calculated in wrong way in block allocation path, as I see this problem exists also in 2.4. We use construction like this i_data[lastfrag], i_data array of pointers to direct blocks, indirect and so on, it has ceratain size ~20 elements, and lastfrag may have value for example 40000. Also this patch fixes related to handling such scenario issues, wrong zeroing metadata, in case of block(not fragment) allocation, and wrong goal calculation, when we allocate block Signed-off-by: -
Mingming Cao authored
To handle the earlier bogus ENOSPC error caused by filesystem full of block reservation, current code falls back to non block reservation, starts to allocate block(s) from the goal allocation block group as if there is no block reservation. Current code needs to re-load the corresponding block group descriptor for the initial goal block group in this case. The patch fixes this. Signed-off-by:
Mingming Cao <cmm@us.ibm.com> Signed-off-by:
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Andries Brouwer authored
Mounting an ext2 filesystem with zero s_inodes_per_group will cause a divide error. Signed-off-by:
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Andries Brouwer authored
Mounting a (corrupt) minix filesystem with zero s_zmap_blocks gives a spectacular crash on my 2.6.17.8 system, no doubt because minix/inode.c does an unconditional minix_set_bit(0,sbi->s_zmap[0]->b_data); [akpm@osdl.org: make labels conistent while we're there] Signed-off-by:
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Jonathan McDowell authored
The recent hwctrl core conversion for MTD NAND devices broke the Amstrad Delta driver. This fixes it up and uses the existing control line defines rather than unclear magic numbers. Signed-off-by:
Jonathan McDowell <noodles@earth.li> Acked-by:
David Woodhouse <dwmw2@infradead.org> Signed-off-by:
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Oleg Nesterov authored
futex_find_get_task: if (p->state == EXIT_ZOMBIE || p->exit_state == EXIT_ZOMBIE) return NULL; I can't understand this. First, p->state can't be EXIT_ZOMBIE. The ->exit_state check looks strange too. Sub-threads or tasks whose ->parent ignores SIGCHLD go directly to EXIT_DEAD state (I am ignoring a ptrace case). Why EXIT_DEAD tasks should be ok? Yes, EXIT_ZOMBIE is more important (a task may stay zombie for a long time), but this doesn't mean we should explicitely ignore other EXIT_XXX states. Signed-off-by:
Oleg Nesterov <oleg@tv-sign.ru> Acked-by:
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Samuel Thibault authored
When reading /dev/vcsa while a font with more than 256 characters is loaded, one of the attribute bits records the 9th bit of the character. But depending on the console driver (vgacon or fbcon for instance), that's bit 3 or bit 0. And there is no way for userland to know that, thus no way for userland to safely grab the screen content. So here is a (tested) patch: Add a VT_GETHIFONTMASK ioctl for knowing which bit is the 9th bit for VC text (vc_hi_font_mask field of the vc_data structure). Signed-off-by:
Samuel Thibault <samuel.thibault@ens-lyon.org> Signed-off-by:
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