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* [PATCH] kobject_add_dirJun'ichi Nomura2006-03-202-0/+40
| | | | | | | | Adding kobject_add_dir() function which creates a subdirectory for a given kobject. Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [PATCH] debugfs: Add debugfs_create_blob() helper for exporting binary dataMichael Ellerman2006-03-202-0/+61
| | | | | | | | | I wanted to export a binary blob via debugfs, and although it was pretty easy it seems like it'd be easier if there was a helper for it. It's a pity we need the wrapper struct but I can't see a cleaner way to do it. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [PATCH] sysfs: fix problem with duplicate sysfs directories and filesManeesh Soni2006-03-204-5/+39
| | | | | | | | The following patch checks for existing sysfs_dirent before preparing new one while creating sysfs directories and files. Signed-off-by: Maneesh Soni <maneesh@in.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [PATCH] Kobject: kobject.h: fix a typoAdrian Bunk2006-03-201-1/+1
| | | | | | | It shouldn't cause real harm, but it hurts my eyes. Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [PATCH] Kobject: provide better warning messages when people do stupid thingsGreg Kroah-Hartman2006-03-201-8/+14
| | | | | | | | Now that kobject_add() is used more than kobject_register() the kernel wasn't always letting people know that they were doing something wrong. This change fixes this. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [PATCH] Driver core: add macros notice(), dev_notice()Tilman Schmidt2006-03-201-0/+2
| | | | | | | | | | | | | | | Both usb.h and device.h have collections of convenience macros for printk() with the KERN_ERR, KERN_WARNING, and KERN_NOTICE severity levels. This patch adds macros for the KERN_NOTICE level which was so far uncatered for. These macros already exist privately in drivers/isdn/gigaset/gigaset.h (currently in the process of being submitted for the kernel tree) but they really belong with their brothers and sisters in include/linux/{device,usb}.h. Signed-off-by: Tilman Schmidt <tilman@imap.cc> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [PATCH] firmware: fix BUG: in fw_realloc_bufferJeff Moyer2006-03-201-2/+4
| | | | | | | | | | | | | | | The fw_realloc_buffer routine does not handle an increase in buffer size of more than 4k. It's not clear to me why it expects that it will only get an extra 4k of data. The attached patch modifies fw_realloc_buffer to vmalloc as much memory as is requested, instead of what we previously had + 4k. I've tested this on my laptop, which would crash occaisionally on boot without the patch. With the patch, it hasn't crashed, but I can't be certain that this code path is exercised. Signed-off-by: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [PATCH] sysfs: kzalloc conversionEric Sesterhenn2006-03-202-4/+2
| | | | | | | | this converts fs/sysfs to kzalloc() usage. compile tested with make allyesconfig Signed-off-by: Eric Sesterhenn <snakebyte@gmx.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [PATCH] fix module sysfs files reference countingGreg Kroah-Hartman2006-03-203-56/+32
| | | | | | | | | | | | | The module files, refcnt, version, and srcversion did not properly increment the owner's module reference count, allowing the modules to be removed while the files were open, causing oopses. This patch fixes this, and also fixes the problem that the version and srcversion files were not showing up, unless CONFIG_MODULE_UNLOAD was enabled, which is not correct. Cc: Nathan Lynch <ntl@pobox.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [PATCH] add EXPORT_SYMBOL_GPL_FUTURE() to USB subsystemGreg Kroah-Hartman2006-03-202-3/+21
| | | | | | | | The USB core symbols will be converted to GPL-only in a few years. Mark this as such and update the documentation explaining why, and provide a pointer for developers to receive help if they need it. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [PATCH] add EXPORT_SYMBOL_GPL_FUTURE() to RCU subsystemGreg Kroah-Hartman2006-03-201-3/+3
| | | | | | | | | As the RCU symbols are going to be changed to GPL in the near future, lets warn users that this is going to happen. Cc: Paul McKenney <paulmck@us.ibm.com> Acked-by: Dipankar Sarma <dipankar@in.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [PATCH] add EXPORT_SYMBOL_GPL_FUTURE()Greg Kroah-Hartman2006-03-207-47/+135
| | | | | | | | This patch adds the ability to mark symbols that will be changed in the future, so that kernel modules that don't include MODULE_LICENSE("GPL") and use the symbols, will be flagged and printed out to the system log. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [PATCH] Clean up module.c symbol searching logicSam Ravnborg2006-03-201-32/+41
| | | | | Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [PATCH] kobj_map semaphore to mutex conversionJes Sorensen2006-03-204-35/+38
| | | | | | | | | Convert the kobj_map code to use a mutex instead of a semaphore. It converts the single two users as well, genhd.c and char_dev.c. Signed-off-by: Jes Sorensen <jes@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [PATCH] kref: avoid an atomic operation in kref_put()Eric Dumazet2006-03-201-1/+6
| | | | | | | | | Avoid an atomic operation in kref_put() when the last reference is dropped. On most platforms, atomic_read() is a plan read of the counter and involves no atomic at all. Signed-off-by: Eric Dumazet <dada1@cosmosbay.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [PATCH] handle errors returned by platform_get_irq*()David Vrabel2006-03-2019-10/+60
| | | | | | | | | platform_get_irq*() now returns on -ENXIO when the resource cannot be found. Ensure all users of platform_get_irq*() handle this error appropriately. Signed-off-by: David Vrabel <dvrabel@arcom.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [PATCH] driver core: platform_get_irq*(): return -ENXIO on errorDavid Vrabel2006-03-201-2/+2
| | | | | | | | platform_get_irq*() cannot return 0 on error as 0 is a valid IRQ on some platforms, return -ENXIO instead. Signed-off-by: David Vrabel <dvrabel@arcom.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [PATCH] Mark empty release functions as brokenGreg Kroah-Hartman2006-03-202-0/+2
| | | | | | Come on people, this is just wrong... Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [PATCH] kobject: fix build error if CONFIG_SYSFS=nJun'ichi Nomura2006-03-202-3/+2
| | | | | | | | | Moving uevent_seqnum and uevent_helper to kobject_uevent.c because they are used even if CONFIG_SYSFS=n while kernel/ksysfs.c is built only if CONFIG_SYSFS=y, Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* [PATCH] sysfs: sysfs_remove_dir() needs to invalidate the dentryGreg Kroah-Hartman2006-03-202-1/+6
| | | | | | | | | | | | | | When calling sysfs_remove_dir() don't allow any further sysfs functions to work for this kobject anymore. This fixes a nasty USB cdc-acm oops on disconnect. Many thanks to Bob Copeland and Paul Fulghum for taking the time to track this down. Cc: Bob Copeland <email@bobcopeland.com> Cc: Paul Fulghum <paulkf@microgate.com> Cc: Maneesh Soni <maneesh@in.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6Linus Torvalds2006-03-20125-4007/+14175
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6: (230 commits) [SPARC64]: Update defconfig. [SPARC64]: Fix 2 bugs in huge page support. [SPARC64]: CONFIG_BLK_DEV_RAM fix [SPARC64]: Optimized TSB table initialization. [SPARC64]: Allow CONFIG_MEMORY_HOTPLUG to build. [SPARC64]: Use SLAB caches for TSB tables. [SPARC64]: Don't kill the page allocator when growing a TSB. [SPARC64]: Randomize mm->mmap_base when PF_RANDOMIZE is set. [SPARC64]: Increase top of 32-bit process stack. [SPARC64]: Top-down address space allocation for 32-bit tasks. [SPARC64] bbc_i2c: Fix cpu check and add missing module license. [SPARC64]: Fix and re-enable dynamic TSB sizing. [SUNSU]: Fix missing spinlock initialization. [TG3]: Do not try to access NIC_SRAM_DATA_SIG on Sun parts. [SPARC64]: First cut at VIS simulator for Niagara. [SPARC64]: Fix system type in /proc/cpuinfo and remove bogus OBP check. [SPARC64]: Add SMT scheduling support for Niagara. [SPARC64]: Fix 32-bit truncation which broke sparsemem. [SPARC64]: Move over to sparsemem. [SPARC64]: Fix new context version SMP handling. ...
| * [SPARC64]: Update defconfig.David S. Miller2006-03-201-11/+14
| | | | | | | | Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Fix 2 bugs in huge page support.David S. Miller2006-03-202-4/+176
| | | | | | | | | | | | | | | | | | | | 1) huge_pte_offset() did not check the page table hierarchy elements as being empty correctly, resulting in an OOPS 2) Need platform specific hugetlb_get_unmapped_area() to handle the top-down vs. bottom-up address space allocation strategies. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: CONFIG_BLK_DEV_RAM fixAndrew Morton2006-03-201-1/+1
| | | | | | | | | | | | | | init/do_mounts_rd.c depends upon CONFIG_BLK_DEV_RAM, not CONFIG_BLK_DEV_INITRD. Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Optimized TSB table initialization.David S. Miller2006-03-204-1/+72
| | | | | | | | | | | | | | | | | | | | | | | | | | | | We only need to write an invalid tag every 16 bytes, so taking advantage of this can save many instructions compared to the simple memset() call we make now. A prefetching implementation is implemented for sun4u and a block-init store version if implemented for Niagara. The next trick is to be able to perform an init and a copy_tsb() in parallel when growing a TSB table. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Allow CONFIG_MEMORY_HOTPLUG to build.David S. Miller2006-03-201-0/+18
| | | | | | | | | | | | | | | | | | | | online_page() is straightforward, and then add a dummy remove_memory() that returns -EINVAL just like i386. There is no point in implementing remove_memory() since __remove_pages() has no implementation either. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Use SLAB caches for TSB tables.David S. Miller2006-03-203-25/+69
| | | | | | | | Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Don't kill the page allocator when growing a TSB.David S. Miller2006-03-201-8/+35
| | | | | | | | | | | | | | | | | | | | | | | | Try only lightly on > 1 order allocations. If a grow fails, we are under memory pressure, so do not try to grow the TSB for this address space any more. If a > 0 order TSB allocation fails on a new fork, retry using a 0 order allocation. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Randomize mm->mmap_base when PF_RANDOMIZE is set.David S. Miller2006-03-201-2/+14
| | | | | | | | Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Increase top of 32-bit process stack.David S. Miller2006-03-205-15/+21
| | | | | | | | | | | | | | Put it one page below the top of the 32-bit address space. This gives us ~16MB more address space to work with. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Top-down address space allocation for 32-bit tasks.David S. Miller2006-03-204-10/+189
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently allocations are very constrained for 32-bit processes. It grows down-up from 0x70000000 to 0xf0000000 which gives about 2GB of stack + dynamic mmap() space. So support the top-down method, and we need to override the generic helper function in order to deal with D-cache coloring. With these changes I was able to squeeze out a mmap() just over 3.6GB in size in a 32-bit process. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64] bbc_i2c: Fix cpu check and add missing module license.David S. Miller2006-03-201-1/+3
| | | | | | | | | | | | | | Should allow cheetah_plus cpu types and don't taint the kernel. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Fix and re-enable dynamic TSB sizing.David S. Miller2006-03-205-118/+203
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is good for up to %50 performance improvement of some test cases. The problem has been the race conditions, and hopefully I've plugged them all up here. 1) There was a serious race in switch_mm() wrt. lazy TLB switching to and from kernel threads. We could erroneously skip a tsb_context_switch() and thus use a stale TSB across a TSB grow event. There is a big comment now in that function describing exactly how it can happen. 2) All code paths that do something with the TSB need to be guarded with the mm->context.lock spinlock. This makes page table flushing paths properly synchronize with both TSB growing and TLB context changes. 3) TSB growing events are moved to the end of successful fault processing. Previously it was in update_mmu_cache() but that is deadlock prone. At the end of do_sparc64_fault() we hold no spinlocks that could deadlock the TSB grow sequence. We also have dropped the address space semaphore. While we're here, add prefetching to the copy_tsb() routine and put it in assembler into the tsb.S file. This piece of code is quite time critical. There are some small negative side effects to this code which can be improved upon. In particular we grab the mm->context.lock even for the tsb insert done by update_mmu_cache() now and that's a bit excessive. We can get rid of that locking, and the same lock taking in flush_tsb_user(), by disabling PSTATE_IE around the whole operation including the capturing of the tsb pointer and tsb_nentries value. That would work because anyone growing the TSB won't free up the old TSB until all cpus respond to the TSB change cross call. I'm not quite so confident in that optimization to put it in right now, but eventually we might be able to and the description is here for reference. This code seems very solid now. It passes several parallel GCC bootstrap builds, and our favorite "nut cruncher" stress test which is a full "make -j8192" build of a "make allmodconfig" kernel. That puts about 256 processes on each cpu's run queue, makes lots of process cpu migrations occur, causes lots of page table and TLB flushing activity, incurs many context version number changes, and it swaps the machine real far out to disk even though there is 16GB of ram on this test system. :-) Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SUNSU]: Fix missing spinlock initialization.David S. Miller2006-03-201-0/+2
| | | | | | | | | | | | Caught by CONFIG_DEBUG_SPINLOCK. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [TG3]: Do not try to access NIC_SRAM_DATA_SIG on Sun parts.David S. Miller2006-03-201-0/+4
| | | | | | | | | | | | | | Sun does't put an SEEPROM behind the tigon3 chip, among other things, so accesses to these areas just give bus timeouts. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: First cut at VIS simulator for Niagara.David S. Miller2006-03-203-1/+901
| | | | | | | | | | | | | | Niagara does not implement some of the VIS instructions in hardware, so we have to emulate them. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Fix system type in /proc/cpuinfo and remove bogus OBP check.David S. Miller2006-03-204-90/+12
| | | | | | | | | | | | | | | | | | | | Report 'sun4v' when appropriate in /proc/cpuinfo Remove all the verifications of the OBP version string. Just make sure it's there, and report it raw in the bootup logs and via /proc/cpuinfo. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Add SMT scheduling support for Niagara.David S. Miller2006-03-203-0/+29
| | | | | | | | | | | | | | | | | | | | | | | | The mapping is a simple "(cpuid >> 2) == core" for now. Later we'll add more sophisticated code that will walk the sun4v machine description and figure this out from there. We should also add core mappings for jaguar and panther processors. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Fix 32-bit truncation which broke sparsemem.David S. Miller2006-03-201-10/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The page->flags manipulations done by the D-cache dirty state tracking was broken because the constants were not marked with "UL" to make them 64-bit, which means we were clobbering the upper 32-bits of page->flags all the time. This doesn't jive well with sparsemem which stores the section and indexing information in the top 32-bits of page->flags. This is yet another sparc64 bug which has been with us forever. While we're here, tidy up some things in bootmem_init() and paginig_init(): 1) Pass min_low_pfn to init_bootmem_node(), it's identical to (phys_base >> PAGE_SHIFT) but we should use consistent with the variable names we print in CONFIG_BOOTMEM_DEBUG 2) max_mapnr, although no longer used, was being set inaccurately, we shouldn't subtract pfn_base any more. 3) All the games with phys_base in the zones_*[] arrays we pass to free_area_init_node() are no longer necessary. Thanks to Josh Grebe and Fabbione for the bug reports and testing. Fix also verified locally on an SB2500 which had a memory layout that triggered the same problem. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Move over to sparsemem.David S. Miller2006-03-207-54/+123
| | | | | | | | | | | | | | | | This has been pending for a long time, and the fact that we waste a ton of ram on some configurations kind of pushed things over the edge. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Fix new context version SMP handling.David S. Miller2006-03-2010-46/+63
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Don't piggy back the SMP receive signal code to do the context version change handling. Instead allocate another fixed PIL number for this asynchronous cross-call. We can't use smp_call_function() because this thing is invoked with interrupts disabled and a few spinlocks held. Also, fix smp_call_function_mask() to count "cpus" correctly. There is no guarentee that the local cpu is in the mask yet that is exactly what this code was assuming. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Bulletproof MMU context locking.David S. Miller2006-03-203-5/+7
| | | | | | | | | | | | | | | | | | | | | | 1) Always spin_lock_init() in init_context(). The caller essentially clears it out, or copies the mm info from the parent. In both cases we need to explicitly initialize the spinlock. 2) Always do explicit IRQ disabling while taking mm->context.lock and ctx_alloc_lock. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: kzalloc() conversionEric Sesterhenn2006-03-2011-58/+27
| | | | | | | | | | | | | | | | this patch converts arch/sparc64 to kzalloc usage. Crosscompile tested with allyesconfig. Signed-off-by: Eric Sesterhenn <snakebyte@gmx.de> Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Fix loop termination in mark_kpte_bitmap()David S. Miller2006-03-201-1/+4
| | | | | | | | | | | | | | | | | | If we were aligned, but didn't have at least 256MB left to process, we would loop forever. Thanks to fabbione for the report and testing the fix. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Simplify TSB insert checks.David S. Miller2006-03-202-23/+6
| | | | | | | | | | | | | | | | | | | | | | | | Don't try to avoid putting non-base page sized entries into the user TSB. It actually costs us more to check this than it helps. Eventually we'll have a multiple TSB scheme for user processes. Once a process starts using larger pages, we'll allocate and use such a TSB. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: More SUN4V cpu mondo bug fixing.David S. Miller2006-03-201-16/+24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This cpu mondo sending interface isn't all that easy to use correctly... We were clearing out the wrong bits from the "mask" after getting something other than EOK from the hypervisor. It turns out the hypervisor can just be resent the same cpu_list[] array, with the 0xffff "done" entries still in there, and it will do the right thing. So don't update or try to rebuild the cpu_list[] array to condense it. This requires the "forward_progress" check to be done slightly differently, but this new scheme is less bug prone than what we were doing before. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Fix sun4v mna winfixup handling.David S. Miller2006-03-201-4/+4
| | | | | | | | | | | | | | We were clobbering a base register before we were done using it. Fix a comment typo while we're here. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Fix mini RTC driver reading.David S. Miller2006-03-201-0/+2
| | | | | | | | | | | | | | Need to subtract 1900 from year and 1 from month before giving it back to userspace. Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Do not allow mapping pages within 4GB of 64-bit VA hole.David S. Miller2006-03-203-24/+73
| | | | | | | | | | | | | | | | | | | | The UltraSPARC T1 manual recommends this because the chip could instruction prefetch into the VA hole, and this would also make decoding certain kinds of memory access traps more difficult (because the chip sign extends certain pieces of trap state). Signed-off-by: David S. Miller <davem@davemloft.net>
| * [SPARC64]: Fix _PAGE_EXEC handling.David S. Miller2006-03-203-8/+15
| | | | | | | | | | | | | | | | | | | | | | First of all, use the known _PAGE_EXEC_{4U,4V} value instead of loading _PAGE_EXEC from memory. We either know which one to use by context, or we can code patch the test. Next, we need to check executability of a PTE in the generic TSB miss handler. Signed-off-by: David S. Miller <davem@davemloft.net>
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