2005-04-17 00:20:36 +02:00
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#
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# Makefile for some libs needed in the kernel.
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#
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2008-10-07 01:06:12 +02:00
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ifdef CONFIG_FUNCTION_TRACER
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2008-07-17 17:40:48 +02:00
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ORIG_CFLAGS := $(KBUILD_CFLAGS)
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KBUILD_CFLAGS = $(subst -pg,,$(ORIG_CFLAGS))
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endif
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2007-10-07 09:24:34 +02:00
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lib-y := ctype.o string.o vsprintf.o cmdline.o \
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2007-02-10 10:46:18 +01:00
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rbtree.o radix-tree.o dump_stack.o \
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2007-11-15 01:58:41 +01:00
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idr.o int_sqrt.o extable.o prio_tree.o \
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2007-10-17 08:25:49 +02:00
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sha1.o irq_regs.o reciprocal_div.o argv_split.o \
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2009-01-16 14:46:40 +01:00
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proportions.o prio_heap.o ratelimit.o show_mem.o \
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2009-03-26 21:39:17 +01:00
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is_single_threaded.o plist.o decompress.o
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[PATCH] Add initial implementation of klist helpers.
This klist interface provides a couple of structures that wrap around
struct list_head to provide explicit list "head" (struct klist) and
list "node" (struct klist_node) objects. For struct klist, a spinlock
is included that protects access to the actual list itself. struct
klist_node provides a pointer to the klist that owns it and a kref
reference count that indicates the number of current users of that node
in the list.
The entire point is to provide an interface for iterating over a list
that is safe and allows for modification of the list during the
iteration (e.g. insertion and removal), including modification of the
current node on the list.
It works using a 3rd object type - struct klist_iter - that is declared
and initialized before an iteration. klist_next() is used to acquire the
next element in the list. It returns NULL if there are no more items.
This klist interface provides a couple of structures that wrap around
struct list_head to provide explicit list "head" (struct klist) and
list "node" (struct klist_node) objects. For struct klist, a spinlock
is included that protects access to the actual list itself. struct
klist_node provides a pointer to the klist that owns it and a kref
reference count that indicates the number of current users of that node
in the list.
The entire point is to provide an interface for iterating over a list
that is safe and allows for modification of the list during the
iteration (e.g. insertion and removal), including modification of the
current node on the list.
It works using a 3rd object type - struct klist_iter - that is declared
and initialized before an iteration. klist_next() is used to acquire the
next element in the list. It returns NULL if there are no more items.
Internally, that routine takes the klist's lock, decrements the reference
count of the previous klist_node and increments the count of the next
klist_node. It then drops the lock and returns.
There are primitives for adding and removing nodes to/from a klist.
When deleting, klist_del() will simply decrement the reference count.
Only when the count goes to 0 is the node removed from the list.
klist_remove() will try to delete the node from the list and block
until it is actually removed. This is useful for objects (like devices)
that have been removed from the system and must be freed (but must wait
until all accessors have finished).
Internally, that routine takes the klist's lock, decrements the reference
count of the previous klist_node and increments the count of the next
klist_node. It then drops the lock and returns.
There are primitives for adding and removing nodes to/from a klist.
When deleting, klist_del() will simply decrement the reference count.
Only when the count goes to 0 is the node removed from the list.
klist_remove() will try to delete the node from the list and block
until it is actually removed. This is useful for objects (like devices)
that have been removed from the system and must be freed (but must wait
until all accessors have finished).
Signed-off-by: Patrick Mochel <mochel@digitalimplant.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff -Nru a/include/linux/klist.h b/include/linux/klist.h
2005-03-21 20:45:16 +01:00
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2006-10-01 08:29:12 +02:00
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lib-$(CONFIG_MMU) += ioremap.o
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2006-03-25 12:08:08 +01:00
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lib-$(CONFIG_SMP) += cpumask.o
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2007-08-12 20:43:55 +02:00
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lib-y += kobject.o kref.o klist.o
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2005-04-17 00:20:36 +02:00
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2008-07-24 06:30:37 +02:00
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obj-y += bcd.o div64.o sort.o parser.o halfmd4.o debug_locks.o random32.o \
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2008-08-31 17:13:54 +02:00
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bust_spinlocks.o hexdump.o kasprintf.o bitmap.o scatterlist.o \
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string_helpers.o
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2005-04-17 00:20:36 +02:00
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ifeq ($(CONFIG_DEBUG_KOBJECT),y)
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CFLAGS_kobject.o += -DDEBUG
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CFLAGS_kobject_uevent.o += -DDEBUG
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endif
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2007-08-12 20:43:55 +02:00
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lib-$(CONFIG_HOTPLUG) += kobject_uevent.o
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2007-02-11 16:41:31 +01:00
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obj-$(CONFIG_GENERIC_IOMAP) += iomap.o
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2007-08-22 23:01:36 +02:00
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obj-$(CONFIG_HAS_IOMEM) += iomap_copy.o devres.o
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obj-$(CONFIG_CHECK_SIGNATURE) += check_signature.o
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2006-07-03 09:24:48 +02:00
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obj-$(CONFIG_DEBUG_LOCKING_API_SELFTESTS) += locking-selftest.o
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[PATCH] spinlock consolidation
This patch (written by me and also containing many suggestions of Arjan van
de Ven) does a major cleanup of the spinlock code. It does the following
things:
- consolidates and enhances the spinlock/rwlock debugging code
- simplifies the asm/spinlock.h files
- encapsulates the raw spinlock type and moves generic spinlock
features (such as ->break_lock) into the generic code.
- cleans up the spinlock code hierarchy to get rid of the spaghetti.
Most notably there's now only a single variant of the debugging code,
located in lib/spinlock_debug.c. (previously we had one SMP debugging
variant per architecture, plus a separate generic one for UP builds)
Also, i've enhanced the rwlock debugging facility, it will now track
write-owners. There is new spinlock-owner/CPU-tracking on SMP builds too.
All locks have lockup detection now, which will work for both soft and hard
spin/rwlock lockups.
The arch-level include files now only contain the minimally necessary
subset of the spinlock code - all the rest that can be generalized now
lives in the generic headers:
include/asm-i386/spinlock_types.h | 16
include/asm-x86_64/spinlock_types.h | 16
I have also split up the various spinlock variants into separate files,
making it easier to see which does what. The new layout is:
SMP | UP
----------------------------|-----------------------------------
asm/spinlock_types_smp.h | linux/spinlock_types_up.h
linux/spinlock_types.h | linux/spinlock_types.h
asm/spinlock_smp.h | linux/spinlock_up.h
linux/spinlock_api_smp.h | linux/spinlock_api_up.h
linux/spinlock.h | linux/spinlock.h
/*
* here's the role of the various spinlock/rwlock related include files:
*
* on SMP builds:
*
* asm/spinlock_types.h: contains the raw_spinlock_t/raw_rwlock_t and the
* initializers
*
* linux/spinlock_types.h:
* defines the generic type and initializers
*
* asm/spinlock.h: contains the __raw_spin_*()/etc. lowlevel
* implementations, mostly inline assembly code
*
* (also included on UP-debug builds:)
*
* linux/spinlock_api_smp.h:
* contains the prototypes for the _spin_*() APIs.
*
* linux/spinlock.h: builds the final spin_*() APIs.
*
* on UP builds:
*
* linux/spinlock_type_up.h:
* contains the generic, simplified UP spinlock type.
* (which is an empty structure on non-debug builds)
*
* linux/spinlock_types.h:
* defines the generic type and initializers
*
* linux/spinlock_up.h:
* contains the __raw_spin_*()/etc. version of UP
* builds. (which are NOPs on non-debug, non-preempt
* builds)
*
* (included on UP-non-debug builds:)
*
* linux/spinlock_api_up.h:
* builds the _spin_*() APIs.
*
* linux/spinlock.h: builds the final spin_*() APIs.
*/
All SMP and UP architectures are converted by this patch.
arm, i386, ia64, ppc, ppc64, s390/s390x, x64 was build-tested via
crosscompilers. m32r, mips, sh, sparc, have not been tested yet, but should
be mostly fine.
From: Grant Grundler <grundler@parisc-linux.org>
Booted and lightly tested on a500-44 (64-bit, SMP kernel, dual CPU).
Builds 32-bit SMP kernel (not booted or tested). I did not try to build
non-SMP kernels. That should be trivial to fix up later if necessary.
I converted bit ops atomic_hash lock to raw_spinlock_t. Doing so avoids
some ugly nesting of linux/*.h and asm/*.h files. Those particular locks
are well tested and contained entirely inside arch specific code. I do NOT
expect any new issues to arise with them.
If someone does ever need to use debug/metrics with them, then they will
need to unravel this hairball between spinlocks, atomic ops, and bit ops
that exist only because parisc has exactly one atomic instruction: LDCW
(load and clear word).
From: "Luck, Tony" <tony.luck@intel.com>
ia64 fix
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjanv@infradead.org>
Signed-off-by: Grant Grundler <grundler@parisc-linux.org>
Cc: Matthew Wilcox <willy@debian.org>
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Mikael Pettersson <mikpe@csd.uu.se>
Signed-off-by: Benoit Boissinot <benoit.boissinot@ens-lyon.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-09-10 09:25:56 +02:00
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obj-$(CONFIG_DEBUG_SPINLOCK) += spinlock_debug.o
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2005-04-17 00:20:36 +02:00
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lib-$(CONFIG_RWSEM_GENERIC_SPINLOCK) += rwsem-spinlock.o
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lib-$(CONFIG_RWSEM_XCHGADD_ALGORITHM) += rwsem.o
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2008-04-01 11:46:19 +02:00
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lib-$(CONFIG_GENERIC_FIND_FIRST_BIT) += find_next_bit.o
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2005-04-17 00:20:36 +02:00
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lib-$(CONFIG_GENERIC_FIND_NEXT_BIT) += find_next_bit.o
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2009-01-01 00:42:19 +01:00
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lib-$(CONFIG_GENERIC_FIND_LAST_BIT) += find_last_bit.o
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2006-12-07 05:39:16 +01:00
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obj-$(CONFIG_GENERIC_HWEIGHT) += hweight.o
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2005-04-17 00:20:36 +02:00
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obj-$(CONFIG_LOCK_KERNEL) += kernel_lock.o
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2005-06-22 02:14:34 +02:00
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obj-$(CONFIG_DEBUG_PREEMPT) += smp_processor_id.o
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2006-09-29 10:59:00 +02:00
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obj-$(CONFIG_DEBUG_LIST) += list_debug.o
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2008-04-30 09:55:01 +02:00
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obj-$(CONFIG_DEBUG_OBJECTS) += debugobjects.o
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2005-04-17 00:20:36 +02:00
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2005-08-17 13:17:26 +02:00
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ifneq ($(CONFIG_HAVE_DEC_LOCK),y)
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2005-04-17 00:20:36 +02:00
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lib-y += dec_and_lock.o
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endif
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2006-12-08 11:36:25 +01:00
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obj-$(CONFIG_BITREVERSE) += bitrev.o
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2005-04-17 00:20:36 +02:00
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obj-$(CONFIG_CRC_CCITT) += crc-ccitt.o
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2005-08-17 13:17:26 +02:00
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obj-$(CONFIG_CRC16) += crc16.o
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2008-06-25 17:22:42 +02:00
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obj-$(CONFIG_CRC_T10DIF)+= crc-t10dif.o
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2006-06-12 16:17:04 +02:00
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obj-$(CONFIG_CRC_ITU_T) += crc-itu-t.o
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2005-04-17 00:20:36 +02:00
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obj-$(CONFIG_CRC32) += crc32.o
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2007-07-17 13:04:03 +02:00
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obj-$(CONFIG_CRC7) += crc7.o
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2005-04-17 00:20:36 +02:00
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obj-$(CONFIG_LIBCRC32C) += libcrc32c.o
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2005-06-22 02:15:02 +02:00
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obj-$(CONFIG_GENERIC_ALLOCATOR) += genalloc.o
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2005-04-17 00:20:36 +02:00
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obj-$(CONFIG_ZLIB_INFLATE) += zlib_inflate/
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obj-$(CONFIG_ZLIB_DEFLATE) += zlib_deflate/
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obj-$(CONFIG_REED_SOLOMON) += reed_solomon/
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2007-07-11 02:22:24 +02:00
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obj-$(CONFIG_LZO_COMPRESS) += lzo/
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obj-$(CONFIG_LZO_DECOMPRESS) += lzo/
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2005-04-17 00:20:36 +02:00
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2009-01-09 00:14:17 +01:00
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lib-$(CONFIG_DECOMPRESS_GZIP) += decompress_inflate.o
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lib-$(CONFIG_DECOMPRESS_BZIP2) += decompress_bunzip2.o
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lib-$(CONFIG_DECOMPRESS_LZMA) += decompress_unlzma.o
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2009-01-05 22:48:31 +01:00
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2005-06-24 08:49:52 +02:00
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obj-$(CONFIG_TEXTSEARCH) += textsearch.o
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[LIB]: Knuth-Morris-Pratt textsearch algorithm
Implements a linear-time string-matching algorithm due to Knuth,
Morris, and Pratt [1]. Their algorithm avoids the explicit
computation of the transition function DELTA altogether. Its
matching time is O(n), for n being length(text), using just an
auxiliary function PI[1..m], for m being length(pattern),
precomputed from the pattern in time O(m). The array PI allows
the transition function DELTA to be computed efficiently
"on the fly" as needed. Roughly speaking, for any state
"q" = 0,1,...,m and any character "a" in SIGMA, the value
PI["q"] contains the information that is independent of "a" and
is needed to compute DELTA("q", "a") [2]. Since the array PI
has only m entries, whereas DELTA has O(m|SIGMA|) entries, we
save a factor of |SIGMA| in the preprocessing time by computing
PI rather than DELTA.
[1] Cormen, Leiserson, Rivest, Stein
Introdcution to Algorithms, 2nd Edition, MIT Press
[2] See finite automation theory
Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
2005-06-24 05:58:37 +02:00
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obj-$(CONFIG_TEXTSEARCH_KMP) += ts_kmp.o
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2005-08-26 01:12:22 +02:00
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obj-$(CONFIG_TEXTSEARCH_BM) += ts_bm.o
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2005-06-24 05:59:16 +02:00
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obj-$(CONFIG_TEXTSEARCH_FSM) += ts_fsm.o
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2006-06-23 11:05:40 +02:00
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obj-$(CONFIG_SMP) += percpu_counter.o
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2006-09-12 09:04:40 +02:00
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obj-$(CONFIG_AUDIT_GENERIC) += audit.o
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2005-06-24 05:49:30 +02:00
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2005-09-29 23:42:42 +02:00
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obj-$(CONFIG_SWIOTLB) += swiotlb.o
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2008-02-05 07:28:07 +01:00
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obj-$(CONFIG_IOMMU_HELPER) += iommu-helper.o
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2006-12-08 11:39:43 +01:00
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obj-$(CONFIG_FAULT_INJECTION) += fault-inject.o
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2005-09-29 23:42:42 +02:00
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[PATCH] Generic BUG implementation
This patch adds common handling for kernel BUGs, for use by architectures as
they wish. The code is derived from arch/powerpc.
The advantages of having common BUG handling are:
- consistent BUG reporting across architectures
- shared implementation of out-of-line file/line data
- implement CONFIG_DEBUG_BUGVERBOSE consistently
This means that in inline impact of BUG is just the illegal instruction
itself, which is an improvement for i386 and x86-64.
A BUG is represented in the instruction stream as an illegal instruction,
which has file/line information associated with it. This extra information is
stored in the __bug_table section in the ELF file.
When the kernel gets an illegal instruction, it first confirms it might
possibly be from a BUG (ie, in kernel mode, the right illegal instruction).
It then calls report_bug(). This searches __bug_table for a matching
instruction pointer, and if found, prints the corresponding file/line
information. If report_bug() determines that it wasn't a BUG which caused the
trap, it returns BUG_TRAP_TYPE_NONE.
Some architectures (powerpc) implement WARN using the same mechanism; if the
illegal instruction was the result of a WARN, then report_bug(Q) returns
CONFIG_DEBUG_BUGVERBOSE; otherwise it returns BUG_TRAP_TYPE_BUG.
lib/bug.c keeps a list of loaded modules which can be searched for __bug_table
entries. The architecture must call
module_bug_finalize()/module_bug_cleanup() from its corresponding
module_finalize/cleanup functions.
Unsetting CONFIG_DEBUG_BUGVERBOSE will reduce the kernel size by some amount.
At the very least, filename and line information will not be recorded for each
but, but architectures may decide to store no extra information per BUG at
all.
Unfortunately, gcc doesn't have a general way to mark an asm() as noreturn, so
architectures will generally have to include an infinite loop (or similar) in
the BUG code, so that gcc knows execution won't continue beyond that point.
gcc does have a __builtin_trap() operator which may be useful to achieve the
same effect, unfortunately it cannot be used to actually implement the BUG
itself, because there's no way to get the instruction's address for use in
generating the __bug_table entry.
[randy.dunlap@oracle.com: Handle BUG=n, GENERIC_BUG=n to prevent build errors]
[bunk@stusta.de: include/linux/bug.h must always #include <linux/module.h]
Signed-off-by: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Andi Kleen <ak@muc.de>
Cc: Hugh Dickens <hugh@veritas.com>
Cc: Michael Ellerman <michael@ellerman.id.au>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-08 11:36:19 +01:00
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lib-$(CONFIG_GENERIC_BUG) += bug.o
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2008-02-14 01:56:49 +01:00
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obj-$(CONFIG_HAVE_LMB) += lmb.o
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2008-07-26 04:45:59 +02:00
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obj-$(CONFIG_HAVE_ARCH_TRACEHOOK) += syscall.o
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2009-02-05 17:51:38 +01:00
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obj-$(CONFIG_DYNAMIC_DEBUG) += dynamic_debug.o
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driver core: basic infrastructure for per-module dynamic debug messages
Base infrastructure to enable per-module debug messages.
I've introduced CONFIG_DYNAMIC_PRINTK_DEBUG, which when enabled centralizes
control of debugging statements on a per-module basis in one /proc file,
currently, <debugfs>/dynamic_printk/modules. When, CONFIG_DYNAMIC_PRINTK_DEBUG,
is not set, debugging statements can still be enabled as before, often by
defining 'DEBUG' for the proper compilation unit. Thus, this patch set has no
affect when CONFIG_DYNAMIC_PRINTK_DEBUG is not set.
The infrastructure currently ties into all pr_debug() and dev_dbg() calls. That
is, if CONFIG_DYNAMIC_PRINTK_DEBUG is set, all pr_debug() and dev_dbg() calls
can be dynamically enabled/disabled on a per-module basis.
Future plans include extending this functionality to subsystems, that define
their own debug levels and flags.
Usage:
Dynamic debugging is controlled by the debugfs file,
<debugfs>/dynamic_printk/modules. This file contains a list of the modules that
can be enabled. The format of the file is as follows:
<module_name> <enabled=0/1>
.
.
.
<module_name> : Name of the module in which the debug call resides
<enabled=0/1> : whether the messages are enabled or not
For example:
snd_hda_intel enabled=0
fixup enabled=1
driver enabled=0
Enable a module:
$echo "set enabled=1 <module_name>" > dynamic_printk/modules
Disable a module:
$echo "set enabled=0 <module_name>" > dynamic_printk/modules
Enable all modules:
$echo "set enabled=1 all" > dynamic_printk/modules
Disable all modules:
$echo "set enabled=0 all" > dynamic_printk/modules
Finally, passing "dynamic_printk" at the command line enables
debugging for all modules. This mode can be turned off via the above
disable command.
[gkh: minor cleanups and tweaks to make the build work quietly]
Signed-off-by: Jason Baron <jbaron@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-08-12 22:46:19 +02:00
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2009-03-04 07:53:30 +01:00
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obj-$(CONFIG_NLATTR) += nlattr.o
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driver core: basic infrastructure for per-module dynamic debug messages
Base infrastructure to enable per-module debug messages.
I've introduced CONFIG_DYNAMIC_PRINTK_DEBUG, which when enabled centralizes
control of debugging statements on a per-module basis in one /proc file,
currently, <debugfs>/dynamic_printk/modules. When, CONFIG_DYNAMIC_PRINTK_DEBUG,
is not set, debugging statements can still be enabled as before, often by
defining 'DEBUG' for the proper compilation unit. Thus, this patch set has no
affect when CONFIG_DYNAMIC_PRINTK_DEBUG is not set.
The infrastructure currently ties into all pr_debug() and dev_dbg() calls. That
is, if CONFIG_DYNAMIC_PRINTK_DEBUG is set, all pr_debug() and dev_dbg() calls
can be dynamically enabled/disabled on a per-module basis.
Future plans include extending this functionality to subsystems, that define
their own debug levels and flags.
Usage:
Dynamic debugging is controlled by the debugfs file,
<debugfs>/dynamic_printk/modules. This file contains a list of the modules that
can be enabled. The format of the file is as follows:
<module_name> <enabled=0/1>
.
.
.
<module_name> : Name of the module in which the debug call resides
<enabled=0/1> : whether the messages are enabled or not
For example:
snd_hda_intel enabled=0
fixup enabled=1
driver enabled=0
Enable a module:
$echo "set enabled=1 <module_name>" > dynamic_printk/modules
Disable a module:
$echo "set enabled=0 <module_name>" > dynamic_printk/modules
Enable all modules:
$echo "set enabled=1 all" > dynamic_printk/modules
Disable all modules:
$echo "set enabled=0 all" > dynamic_printk/modules
Finally, passing "dynamic_printk" at the command line enables
debugging for all modules. This mode can be turned off via the above
disable command.
[gkh: minor cleanups and tweaks to make the build work quietly]
Signed-off-by: Jason Baron <jbaron@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-08-12 22:46:19 +02:00
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2009-01-09 12:19:52 +01:00
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obj-$(CONFIG_DMA_API_DEBUG) += dma-debug.o
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2005-04-17 00:20:36 +02:00
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hostprogs-y := gen_crc32table
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clean-files := crc32table.h
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$(obj)/crc32.o: $(obj)/crc32table.h
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quiet_cmd_crc32 = GEN $@
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|
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cmd_crc32 = $< > $@
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$(obj)/crc32table.h: $(obj)/gen_crc32table
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|
$(call cmd,crc32)
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