- 27 7月, 2010 1 次提交
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由 Will Deacon 提交于
ARM has support for the atomic64_dec_if_positive operation so ensure that it is tested by the atomic64_test routine. Acked-by: NNicolas Pitre <nicolas.pitre@linaro.org> Signed-off-by: NWill Deacon <will.deacon@arm.com> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 14 7月, 2010 1 次提交
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由 Yinghai Lu 提交于
via following scripts FILES=$(find * -type f | grep -vE 'oprofile|[^K]config') sed -i \ -e 's/lmb/memblock/g' \ -e 's/LMB/MEMBLOCK/g' \ $FILES for N in $(find . -name lmb.[ch]); do M=$(echo $N | sed 's/lmb/memblock/g') mv $N $M done and remove some wrong change like lmbench and dlmb etc. also move memblock.c from lib/ to mm/ Suggested-by: NIngo Molnar <mingo@elte.hu> Acked-by: N"H. Peter Anvin" <hpa@zytor.com> Acked-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: NLinus Torvalds <torvalds@linux-foundation.org> Signed-off-by: NYinghai Lu <yinghai@kernel.org> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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- 05 7月, 2010 2 次提交
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由 Peter Zijlstra 提交于
Reimplement augmented RB-trees without sprinkling extra branches all over the RB-tree code (which lives in the scheduler hot path). This approach is 'borrowed' from Fabio's BFQ implementation and relies on traversing the rebalance path after the RB-tree-op to correct the heap property for insertion/removal and make up for the damage done by the tree rotations. For insertion the rebalance path is trivially that from the new node upwards to the root, for removal it is that from the deepest node in the path from the to be removed node that will still be around after the removal. [ This patch also fixes a video driver regression reported by Ali Gholami Rudi - the memtype->subtree_max_end was updated incorrectly. ] Acked-by: NSuresh Siddha <suresh.b.siddha@intel.com> Acked-by: NVenkatesh Pallipadi <venki@google.com> Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> Tested-by: NAli Gholami Rudi <ali@rudi.ir> Cc: Fabio Checconi <fabio@gandalf.sssup.it> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> LKML-Reference: <1275414172.27810.27961.camel@twins> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Yehuda Sadeh 提交于
We should initialize the module dynamic debug datastructures only after determining that the module is not loaded yet. This fixes a bug that introduced in 2.6.35-rc2, where when a trying to load a module twice, we also load it's dynamic printing data twice which causes all sorts of nasty issues. Also handle the dynamic debug cleanup later on failure. Signed-off-by: NYehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (removed a #ifdef) Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 30 6月, 2010 1 次提交
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由 Imre Deak 提交于
bitmap_find_next_zero_area requires the size of the bitmap, we instead passed the last suitable position. This made it impossible to allocate from the end of the pool. Fixes a regression introduced by 243797f5 ("genalloc: use bitmap_find_next_zero_area"). Signed-off-by: NImre Deak <imre.deak@nokia.com> Cc: Zygo Blaxell <zygo.blaxell@xandros.com> Cc: Tejun Heo <tj@kernel.org> Acked-by: NAkinobu Mita <akinobu.mita@gmail.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 23 6月, 2010 1 次提交
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由 Paul E. McKenney 提交于
Convert to rcu_dereference_raw() given that many callers may have many different locking models. Located-by: NMiles Lane <miles.lane@gmail.com> Tested-by: NMiles Lane <miles.lane@gmail.com> Signed-off-by: NPaul E. McKenney <paulmck@linux.vnet.ibm.com>
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- 05 6月, 2010 3 次提交
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由 Heiko Carstens 提交于
Add s390 to list of architectures that have atomic64_dec_if_positive implemented so we get rid of this warning: lib/atomic64_test.c:129:2: warning: #warning Please implement atomic64_dec_if_positive for your architecture, and add it to the IF above Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Cc: Luca Barbieri <luca@luca-barbieri.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Dan Carpenter 提交于
There is a kfree(ue_sk) missing on the error path if netlink_kernel_create() fails. Signed-off-by: NDan Carpenter <error27@gmail.com> Reviewed-by: N"Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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由 Andrew Morton 提交于
lib/kobject_uevent.c:87: warning: 'kobj_bcast_filter' defined but not used Repairs "hotplug: netns aware uevent_helper" Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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- 31 5月, 2010 1 次提交
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由 Linus Torvalds 提交于
This reverts commit 0ac0c0d0, which caused cross-architecture build problems for all the wrong reasons. IA64 already added its own version of __node_random(), but the fact is, there is nothing architectural about the function, and the original commit was just badly done. Revert it, since no fix is forthcoming. Requested-by: NStephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 28 5月, 2010 6 次提交
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由 Cesar Eduardo Barros 提交于
radix_tree_prev_hole() used LONG_MAX to detect underflow; however, ULONG_MAX is clearly what was intended, both here and by its only user (count_history_pages at mm/readahead.c). Reviewed-by: NWu Fengguang <fengguang.wu@intel.com> Signed-off-by: NCesar Eduardo Barros <cesarb@cesarb.net> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 FUJITA Tomonori 提交于
swiotlb_sync_single_range_for_cpu and swiotlb_sync_single_range_for_device are unnecessary because swiotlb_sync_single_for_cpu and swiotlb_sync_single_for_device can be used instead. Signed-off-by: NFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Reviewed-by: NKonrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Joe Eykholt 提交于
This patch moves the definition of struct rnd_state and the inline __seed() function to linux/random.h. It renames the static __random32() function to prandom32() and exports it for use in modules. prandom32() is useful as a privately-seeded pseudo random number generator that can give the same result every time it is initialized. For FCoE FC-BB-6 VN2VN mode self-selected unique FC address generation, we need an pseudo-random number generator seeded with the 64-bit world-wide port name. A truly random generator or one seeded with randomness won't do because the same sequence of numbers should be generated each time we boot or the link comes up. A prandom32_seed() inline function is added to the header file. It is inlined not for speed, but so the function won't be expanded in the base kernel, but only in the module that uses it. Signed-off-by: NJoe Eykholt <jeykholt@cisco.com> Acked-by: NMatt Mackall <mpm@selenic.com> Cc: Theodore Ts'o <tytso@mit.edu> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Imre Deak 提交于
Currently idr_remove_all will fail with a use after free error if idr::layers is bigger than 2, which on 32 bit systems corresponds to items more than 1024. This is due to stepping back too many levels during backtracking. For simplicity let's assume that IDR_BITS=1 -> we have 2 nodes at each level below the root node and each leaf node stores two IDs. (In reality for 32 bit systems IDR_BITS=5, with 32 nodes at each sub-root level and 32 IDs in each leaf node). The sequence of freeing the nodes at the moment is as follows: layer 1 -> a(7) 2 -> b(3) c(5) 3 -> d(1) e(2) f(4) g(6) Until step 4 things go fine, but then node c is freed, whereas node g should be freed first. Since node c contains the pointer to node g we'll have a use after free error at step 6. How many levels we step back after visiting the leaf nodes is currently determined by the msb of the id we are currently visiting: Step 1. node d with IDs 0,1 is freed, current ID is advanced to 2. msb of the current ID bit 1. This means we need to step back 1 level to node b and take the next sibling, node e. 2-3. node e with IDs 2,3 is freed, current ID is 4, msb is bit 2. This means we need to step back 2 levels to node a, freeing node b on the way. 4-5. node f with IDs 4,5 is freed, current ID is 6, msb is still bit 2. This means we again need to step back 2 levels to node a and free c on the way. 6. We should visit node g, but its pointer is not available as node c was freed. The fix changes how we determine the number of levels to step back. Instead of deducting this merely from the msb of the current ID, we should really check if advancing the ID causes an overflow to a bit position corresponding to a given layer. In the above example overflow from bit 0 to bit 1 should mean stepping back 1 level. Overflow from bit 1 to bit 2 should mean stepping back 2 levels and so on. The fix was tested with IDs up to 1 << 20, which corresponds to 4 layers on 32 bit systems. Signed-off-by: NImre Deak <imre.deak@nokia.com> Reviewed-by: NTejun Heo <tj@kernel.org> Cc: Eric Paris <eparis@redhat.com> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Cc: <stable@kernel.org> [2.6.34.1] Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Akinobu Mita 提交于
I used this module to test the series of modification to the cpu notifiers code. Example1: inject CPU offline error (-1 == -EPERM) # modprobe cpu-notifier-error-inject cpu_down_prepare_error=-1 # echo 0 > /sys/devices/system/cpu/cpu1/online bash: echo: write error: Operation not permitted Example2: inject CPU online error (-2 == -ENOENT) # modprobe cpu-notifier-error-inject cpu_up_prepare_error=-2 # echo 1 > /sys/devices/system/cpu/cpu1/online bash: echo: write error: No such file or directory [akpm@linux-foundation.org: fix Kconfig help text] Signed-off-by: NAkinobu Mita <akinobu.mita@gmail.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Jack Steiner 提交于
Some workloads that create a large number of small files tend to assign too many pages to node 0 (multi-node systems). Part of the reason is that the rotor (in cpuset_mem_spread_node()) used to assign nodes starts at node 0 for newly created tasks. This patch changes the rotor to be initialized to a random node number of the cpuset. [akpm@linux-foundation.org: fix layout] [Lee.Schermerhorn@hp.com: Define stub numa_random() for !NUMA configuration] Signed-off-by: NJack Steiner <steiner@sgi.com> Signed-off-by: NLee Schermerhorn <lee.schermerhorn@hp.com> Cc: Christoph Lameter <cl@linux-foundation.org> Cc: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Paul Menage <menage@google.com> Cc: Jack Steiner <steiner@sgi.com> Cc: Robin Holt <holt@sgi.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 26 5月, 2010 1 次提交
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由 Andrew Morton 提交于
It doesn't work on big-endian - those architectures don't define __LITTLE_ENDIAN. Cc: Joakim Tjernlund <joakim.tjernlund@transmode.se> Reported-by: NStephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 25 5月, 2010 9 次提交
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由 Joakim Tjernlund 提交于
Since crc32.c contains a nifty test program that can be executed in user space, make sure endian detection works reliably in user space too. Signed-off-by: NJoakim Tjernlund <Joakim.Tjernlund@transmode.se> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Joakim Tjernlund 提交于
Precompute more crc32 values(0xcc00, 0xcc0000 and 0xcc000000) into tables. This increases the table size from 1KB to 4KB but the performance benfit makes it worth it: 28% faster on MPC8321, 266 MHz 2x faster on Core 2 Duo, 3.1GHz [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: NJoakim Tjernlund <Joakim.Tjernlund@transmode.se> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Andy Shevchenko 提交于
hex_to_bin() is a little method which converts hex digit to its actual value. There are plenty of places where such functionality is needed. [akpm@linux-foundation.org: use tolower(), saving 3 bytes, test the more common case first - it's quicker] [akpm@linux-foundation.org: relocate tolower to make it even faster! (Joe)] Signed-off-by: NAndy Shevchenko <ext-andriy.shevchenko@nokia.com> Cc: Tilman Schmidt <tilman@imap.cc> Cc: Duncan Sands <duncan.sands@free.fr> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Greg Kroah-Hartman <gregkh@suse.de> Cc: "Richard Russon (FlatCap)" <ldm@flatcap.org> Cc: John W. Linville <linville@tuxdriver.com> Cc: Len Brown <lenb@kernel.org> Cc: Joe Perches <joe@perches.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Joe Perches 提交于
Reduce char linebuf[200] to the actual size required., which is 32 * 3 + 2 + 32 + 1, ie: linebuf[131]. Change examples to use bool true not int 1. Align multiline argument indentation to open parenthesis. Use temporary for ptr[j] so trigraph fits on single line. Convert printk ptr from %*p, (int)(2 * sizeof(void *)) to %p as %p uses the same calculation for size. Signed-off-by: NJoe Perches <joe@perches.com> Cc: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Florian Ragwitz 提交于
[akpm@linux-foundation.org: coding-style fixes] Signed-off-by: NFlorian Ragwitz <rafl@debian.org> Cc: Jason Baron <jbaron@redhat.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Dan Carpenter 提交于
This doesn't change behavior at all. In the original code, if nwords was zero then ddebug_parse_query() would return -EINVAL, now we just do it earlier. Signed-off-by: NDan Carpenter <error27@gmail.com> Acked-by: NJason Baron <jbaron@redhat.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Joe Perches 提交于
Mark static functions with noinline_for_stack Before: akpm:/usr/src/25> objdump -d lib/vsprintf.o | perl scripts/checkstack.pl 0x00000e82 pointer [vsprintf.o]: 344 0x0000198c pointer [vsprintf.o]: 344 0x000025d6 scnprintf [vsprintf.o]: 216 0x00002648 scnprintf [vsprintf.o]: 216 0x00002565 snprintf [vsprintf.o]: 208 0x0000267c sprintf [vsprintf.o]: 208 0x000030a3 bprintf [vsprintf.o]: 208 0x00003b1e sscanf [vsprintf.o]: 208 0x00000608 number [vsprintf.o]: 136 0x00000937 number [vsprintf.o]: 136 After: akpm:/usr/src/25> objdump -d lib/vsprintf.o | perl scripts/checkstack.pl 0x00000a7c symbol_string [vsprintf.o]: 248 0x00000ae8 symbol_string [vsprintf.o]: 248 0x00002310 scnprintf [vsprintf.o]: 216 0x00002382 scnprintf [vsprintf.o]: 216 0x0000229f snprintf [vsprintf.o]: 208 0x000023b6 sprintf [vsprintf.o]: 208 0x00002ddd bprintf [vsprintf.o]: 208 0x00003858 sscanf [vsprintf.o]: 208 0x00000625 number [vsprintf.o]: 136 0x00000954 number [vsprintf.o]: 136 Signed-off-by: NJoe Perches <joe@perches.com> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Alexey Dobriyan 提交于
- C99 knows about USHRT_MAX/SHRT_MAX/SHRT_MIN, not USHORT_MAX/SHORT_MAX/SHORT_MIN. - Make SHRT_MIN of type s16, not int, for consistency. [akpm@linux-foundation.org: fix drivers/dma/timb_dma.c] [akpm@linux-foundation.org: fix security/keys/keyring.c] Signed-off-by: NAlexey Dobriyan <adobriyan@gmail.com> Acked-by: NWANG Cong <xiyou.wangcong@gmail.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Peter Huewe 提交于
Fix a build-failure (http://kisskb.ellerman.id.au/kisskb/buildresult/2601239/) by adding the missing include file (linux/kernel.h) for printk and KERN_INFO. Signed-off-by: NPeter Huewe <peterhuewe@gmx.de> LKML-Reference: <201005241913.o4OJDKdf010884@imap1.linux-foundation.org> Cc: Luca Barbieri <luca@luca-barbieri.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NH. Peter Anvin <hpa@linux.intel.com>
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- 22 5月, 2010 7 次提交
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由 Eric W. Biederman 提交于
It only makes sense for uevent_helper to get events in the intial namespaces. It's invocation is not per namespace and it is not clear how we could make it's invocation namespace aware. Signed-off-by: NEric W. Biederman <ebiederm@xmission.com> Acked-by: NDavid S. Miller <davem@davemloft.net> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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由 Eric W. Biederman 提交于
Utilize netlink_broacast_filtered to allow sending hotplug events in the proper namespace. Signed-off-by: NEric W. Biederman <ebiederm@xmission.com> Acked-by: NDavid S. Miller <davem@davemloft.net> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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由 Eric W. Biederman 提交于
Open a copy of the uevent kernel socket in each network namespace so we can send uevents in all network namespaces. Signed-off-by: NEric W. Biederman <ebiederm@xmission.com> Acked-by: NDavid S. Miller <davem@davemloft.net> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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由 Eric W. Biederman 提交于
The problem. When implementing a network namespace I need to be able to have multiple network devices with the same name. Currently this is a problem for /sys/class/net/*, /sys/devices/virtual/net/*, and potentially a few other directories of the form /sys/ ... /net/*. What this patch does is to add an additional tag field to the sysfs dirent structure. For directories that should show different contents depending on the context such as /sys/class/net/, and /sys/devices/virtual/net/ this tag field is used to specify the context in which those directories should be visible. Effectively this is the same as creating multiple distinct directories with the same name but internally to sysfs the result is nicer. I am calling the concept of a single directory that looks like multiple directories all at the same path in the filesystem tagged directories. For the networking namespace the set of directories whose contents I need to filter with tags can depend on the presence or absence of hotplug hardware or which modules are currently loaded. Which means I need a simple race free way to setup those directories as tagged. To achieve a reace free design all tagged directories are created and managed by sysfs itself. Users of this interface: - define a type in the sysfs_tag_type enumeration. - call sysfs_register_ns_types with the type and it's operations - sysfs_exit_ns when an individual tag is no longer valid - Implement mount_ns() which returns the ns of the calling process so we can attach it to a sysfs superblock. - Implement ktype.namespace() which returns the ns of a syfs kobject. Everything else is left up to sysfs and the driver layer. For the network namespace mount_ns and namespace() are essentially one line functions, and look to remain that. Tags are currently represented a const void * pointers as that is both generic, prevides enough information for equality comparisons, and is trivial to create for current users, as it is just the existing namespace pointer. The work needed in sysfs is more extensive. At each directory or symlink creating I need to check if the directory it is being created in is a tagged directory and if so generate the appropriate tag to place on the sysfs_dirent. Likewise at each symlink or directory removal I need to check if the sysfs directory it is being removed from is a tagged directory and if so figure out which tag goes along with the name I am deleting. Currently only directories which hold kobjects, and symlinks are supported. There is not enough information in the current file attribute interfaces to give us anything to discriminate on which makes it useless, and there are no potential users which makes it an uninteresting problem to solve. Signed-off-by: NEric W. Biederman <ebiederm@xmission.com> Signed-off-by: NBenjamin Thery <benjamin.thery@bull.net> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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由 Eric W. Biederman 提交于
Move complete knowledge of namespaces into the kobject layer so we can use that information when reporting kobjects to userspace. Signed-off-by: NEric W. Biederman <ebiederm@xmission.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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由 Serge E. Hallyn 提交于
Add some in-line comments to explain the new infrastructure, which was introduced to support sysfs directory tagging with namespaces. I think an overall description someplace might be good too, but it didn't really seem to fit into Documentation/filesystems/sysfs.txt, which appears more geared toward users, rather than maintainers, of sysfs. (Tejun, please let me know if I can make anything clearer or failed altogether to comment something that should be commented.) Signed-off-by: NSerge E. Hallyn <serue@us.ibm.com> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Tejun Heo <tj@kernel.org> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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由 NeilBrown 提交于
Of the three uses of kref_set in the kernel: One really should be kref_put as the code is letting go of a reference, Two really should be kref_init because the kref is being initialised. This suggests that making kref_set available encourages bad code. So fix the three uses and remove kref_set completely. Signed-off-by: NNeilBrown <neilb@suse.de> Acked-by: NMimi Zohar <zohar@us.ibm.com> Acked-by: NSerge Hallyn <serue@us.ibm.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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- 21 5月, 2010 4 次提交
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由 Jason Wessel 提交于
The only way the debugger can handle a trap in inside rcu_lock, notify_die, or atomic_notifier_call_chain without a recursive fault is to have a low level "first opportunity handler" do_trap_or_bp() handler. Generally this will be something the vast majority of folks will not need, but for those who need it, it is added as a kernel .config option called KGDB_LOW_LEVEL_TRAP. Also added was a die notification for oops such that kdb can catch an oops for analysis. There appeared to be no obvious way to pass the struct pt_regs from the original exception back to the stack back tracer, so a special case was added to show_stack() for when kdb is active because you generally desire to generally look at the back trace of the original exception. Signed-off-by: NJason Wessel <jason.wessel@windriver.com> Acked-by: NRalf Baechle <ralf@linux-mips.org>
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由 Jason Wessel 提交于
The only way the debugger can handle a trap in inside rcu_lock, notify_die, or atomic_notifier_call_chain without a triple fault is to have a low level "first opportunity handler" in the int3 exception handler. Generally this will be something the vast majority of folks will not need, but for those who need it, it is added as a kernel .config option called KGDB_LOW_LEVEL_TRAP. CC: Ingo Molnar <mingo@elte.hu> CC: Thomas Gleixner <tglx@linutronix.de> CC: H. Peter Anvin <hpa@zytor.com> CC: x86@kernel.org Signed-off-by: NJason Wessel <jason.wessel@windriver.com>
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由 Jason Wessel 提交于
This patch adds in the kdb PS/2 keyboard driver. This was mostly a direct port from the original kdb where I cleaned up the code against checkpatch.pl and added the glue to stitch it into kgdb. This patch also enables early kdb debug via kgdbwait and the keyboard. All the access to configure kdb using either a serial console or the keyboard is done via kgdboc. If you want to use only the keyboard and want to break in early you would add to your kernel command arguments: kgdboc=kbd kgdbwait If you wanted serial and or the keyboard access you could use: kgdboc=kbd,ttyS0 You can also configure kgdboc as a kernel module or at run time with the sysfs where you can activate and deactivate kgdb. Turn it on: echo kbd,ttyS0 > /sys/module/kgdboc/parameters/kgdboc Turn it off: echo "" > /sys/module/kgdboc/parameters/kgdboc Signed-off-by: NJason Wessel <jason.wessel@windriver.com> Reviewed-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>
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由 Jason Wessel 提交于
These are the minimum changes to the kgdb core in order to enable an API to connect a new front end (kdb) to the debug core. This patch introduces the dbg_kdb_mode variable controls where the user level I/O is routed. It will be routed to the gdbstub (kgdb) or to the kdb front end which is a simple shell available over the kgdboc connection. You can switch back and forth between kdb or the gdb stub mode of operation dynamically. From gdb stub mode you can blindly type "$3#33", or from the kdb mode you can enter "kgdb" to switch to the gdb stub. The logic in the debug core depends on kdb to look for the typical gdb connection sequences and return immediately with KGDB_PASS_EVENT if a gdb serial command sequence is detected. That should allow a reasonably seamless transition between kdb -> gdb without leaving the kernel exception state. The two gdb serial queries that kdb is responsible for detecting are the "?" and "qSupported" packets. CC: Ingo Molnar <mingo@elte.hu> Signed-off-by: NJason Wessel <jason.wessel@windriver.com> Acked-by: NMartin Hicks <mort@sgi.com>
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- 20 5月, 2010 1 次提交
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由 Huang Ying 提交于
There are many different UUID/GUID definitions in kernel, such as that in EFI, many file systems, some drivers, etc. Every kernel components need UUID/GUID has its own definition. This patch provides a unified definition for UUID/GUID. UUID is defined via typedef. This makes that UUID appears more like a preliminary type, and makes the data type explicit (comparing with implicit "u8 uuid[16]"). The binary representation of UUID/GUID can be little-endian (used by EFI, etc) or big-endian (defined by RFC4122), so both is defined. Signed-off-by: NHuang Ying <ying.huang@intel.com> Signed-off-by: NAndi Kleen <ak@linux.intel.com> Signed-off-by: NLen Brown <len.brown@intel.com>
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- 19 5月, 2010 1 次提交
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由 Ben Hutchings 提交于
WARN() is used in some places to report firmware or hardware bugs that are then worked-around. These bugs do not affect the stability of the kernel and should not set the flag for TAINT_WARN. To allow for this, add WARN_TAINT() and WARN_TAINT_ONCE() macros that take a taint number as argument. Architectures that implement warnings using trap instructions instead of calls to warn_slowpath_*() now implement __WARN_TAINT(taint) instead of __WARN(). Signed-off-by: NBen Hutchings <ben@decadent.org.uk> Acked-by: NHelge Deller <deller@gmx.de> Tested-by: NPaul Mundt <lethal@linux-sh.org> Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>
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- 16 5月, 2010 1 次提交
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由 kirjanov@gmail.com 提交于
mempool_alloc() can return null in atomic case. Signed-off-by: NDenis Kirjanov <kirjanov@gmail.com> Cc: Joern Engel <joern@logfs.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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