From 8344b568f5bdc7ee1bba909de3294c6348c36056 Mon Sep 17 00:00:00 2001 From: Alex Chiang Date: Tue, 10 Jun 2008 15:30:42 -0600 Subject: PCI: ACPI PCI slot detection driver Detect all physical PCI slots as described by ACPI, and create entries in /sys/bus/pci/slots/. Not all physical slots are hotpluggable, and the acpiphp module does not detect them. Now we know the physical PCI geography of our system, without caring about hotplug. [kaneshige.kenji@jp.fujitsu.com: export-kobject_rename-for-pci_hotplug_core] Signed-off-by: Kenji Kaneshige Acked-by: Greg KH [akpm@linux-foundation.org: build fix] [akpm@linux-foundation.org: fix build with CONFIG_DMI=n] Signed-off-by: Alex Chiang Cc: Greg KH Cc: Kristen Carlson Accardi Cc: Len Brown Acked-by: Len Brown Acked-by: Kenji Kaneshige Signed-off-by: Andrew Morton Signed-off-by: Andrew Morton Signed-off-by: Jesse Barnes --- lib/kobject.c | 1 + 1 file changed, 1 insertion(+) (limited to 'lib') diff --git a/lib/kobject.c b/lib/kobject.c index 718e5101c263..dcade0543bd2 100644 --- a/lib/kobject.c +++ b/lib/kobject.c @@ -439,6 +439,7 @@ out: return error; } +EXPORT_SYMBOL_GPL(kobject_rename); /** * kobject_move - move object to another parent -- cgit v1.2.2 From f11f594edba7f689af9792a5673ed59d660ad371 Mon Sep 17 00:00:00 2001 From: "Martin K. Petersen" Date: Wed, 25 Jun 2008 11:22:42 -0400 Subject: [SCSI] lib: Add support for the T10 (SCSI) Data Integrity Field CRC The SCSI Block Protocol uses this 16-bit CRC to verify the integrity of each data sector. crc_t10dif() is used by sd_dif.c when performing I/O to or from disks formatted with protection information. Signed-off-by: Martin K. Petersen Signed-off-by: James Bottomley --- lib/Kconfig | 7 ++++++ lib/Makefile | 1 + lib/crc-t10dif.c | 67 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 75 insertions(+) create mode 100644 lib/crc-t10dif.c (limited to 'lib') diff --git a/lib/Kconfig b/lib/Kconfig index 8cc8e8722a3f..c7ad7a5b3535 100644 --- a/lib/Kconfig +++ b/lib/Kconfig @@ -29,6 +29,13 @@ config CRC16 the kernel tree does. Such modules that use library CRC16 functions require M here. +config CRC_T10DIF + tristate "CRC calculation for the T10 Data Integrity Field" + help + This option is only needed if a module that's not in the + kernel tree needs to calculate CRC checks for use with the + SCSI data integrity subsystem. + config CRC_ITU_T tristate "CRC ITU-T V.41 functions" help diff --git a/lib/Makefile b/lib/Makefile index 74b0cfb1fcc3..237a8298f8cb 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -45,6 +45,7 @@ endif obj-$(CONFIG_BITREVERSE) += bitrev.o obj-$(CONFIG_CRC_CCITT) += crc-ccitt.o obj-$(CONFIG_CRC16) += crc16.o +obj-$(CONFIG_CRC_T10DIF)+= crc-t10dif.o obj-$(CONFIG_CRC_ITU_T) += crc-itu-t.o obj-$(CONFIG_CRC32) += crc32.o obj-$(CONFIG_CRC7) += crc7.o diff --git a/lib/crc-t10dif.c b/lib/crc-t10dif.c new file mode 100644 index 000000000000..fbbd66ed86cd --- /dev/null +++ b/lib/crc-t10dif.c @@ -0,0 +1,67 @@ +/* + * T10 Data Integrity Field CRC16 calculation + * + * Copyright (c) 2007 Oracle Corporation. All rights reserved. + * Written by Martin K. Petersen + * + * This source code is licensed under the GNU General Public License, + * Version 2. See the file COPYING for more details. + */ + +#include +#include +#include + +/* Table generated using the following polynomium: + * x^16 + x^15 + x^11 + x^9 + x^8 + x^7 + x^5 + x^4 + x^2 + x + 1 + * gt: 0x8bb7 + */ +static const __u16 t10_dif_crc_table[256] = { + 0x0000, 0x8BB7, 0x9CD9, 0x176E, 0xB205, 0x39B2, 0x2EDC, 0xA56B, + 0xEFBD, 0x640A, 0x7364, 0xF8D3, 0x5DB8, 0xD60F, 0xC161, 0x4AD6, + 0x54CD, 0xDF7A, 0xC814, 0x43A3, 0xE6C8, 0x6D7F, 0x7A11, 0xF1A6, + 0xBB70, 0x30C7, 0x27A9, 0xAC1E, 0x0975, 0x82C2, 0x95AC, 0x1E1B, + 0xA99A, 0x222D, 0x3543, 0xBEF4, 0x1B9F, 0x9028, 0x8746, 0x0CF1, + 0x4627, 0xCD90, 0xDAFE, 0x5149, 0xF422, 0x7F95, 0x68FB, 0xE34C, + 0xFD57, 0x76E0, 0x618E, 0xEA39, 0x4F52, 0xC4E5, 0xD38B, 0x583C, + 0x12EA, 0x995D, 0x8E33, 0x0584, 0xA0EF, 0x2B58, 0x3C36, 0xB781, + 0xD883, 0x5334, 0x445A, 0xCFED, 0x6A86, 0xE131, 0xF65F, 0x7DE8, + 0x373E, 0xBC89, 0xABE7, 0x2050, 0x853B, 0x0E8C, 0x19E2, 0x9255, + 0x8C4E, 0x07F9, 0x1097, 0x9B20, 0x3E4B, 0xB5FC, 0xA292, 0x2925, + 0x63F3, 0xE844, 0xFF2A, 0x749D, 0xD1F6, 0x5A41, 0x4D2F, 0xC698, + 0x7119, 0xFAAE, 0xEDC0, 0x6677, 0xC31C, 0x48AB, 0x5FC5, 0xD472, + 0x9EA4, 0x1513, 0x027D, 0x89CA, 0x2CA1, 0xA716, 0xB078, 0x3BCF, + 0x25D4, 0xAE63, 0xB90D, 0x32BA, 0x97D1, 0x1C66, 0x0B08, 0x80BF, + 0xCA69, 0x41DE, 0x56B0, 0xDD07, 0x786C, 0xF3DB, 0xE4B5, 0x6F02, + 0x3AB1, 0xB106, 0xA668, 0x2DDF, 0x88B4, 0x0303, 0x146D, 0x9FDA, + 0xD50C, 0x5EBB, 0x49D5, 0xC262, 0x6709, 0xECBE, 0xFBD0, 0x7067, + 0x6E7C, 0xE5CB, 0xF2A5, 0x7912, 0xDC79, 0x57CE, 0x40A0, 0xCB17, + 0x81C1, 0x0A76, 0x1D18, 0x96AF, 0x33C4, 0xB873, 0xAF1D, 0x24AA, + 0x932B, 0x189C, 0x0FF2, 0x8445, 0x212E, 0xAA99, 0xBDF7, 0x3640, + 0x7C96, 0xF721, 0xE04F, 0x6BF8, 0xCE93, 0x4524, 0x524A, 0xD9FD, + 0xC7E6, 0x4C51, 0x5B3F, 0xD088, 0x75E3, 0xFE54, 0xE93A, 0x628D, + 0x285B, 0xA3EC, 0xB482, 0x3F35, 0x9A5E, 0x11E9, 0x0687, 0x8D30, + 0xE232, 0x6985, 0x7EEB, 0xF55C, 0x5037, 0xDB80, 0xCCEE, 0x4759, + 0x0D8F, 0x8638, 0x9156, 0x1AE1, 0xBF8A, 0x343D, 0x2353, 0xA8E4, + 0xB6FF, 0x3D48, 0x2A26, 0xA191, 0x04FA, 0x8F4D, 0x9823, 0x1394, + 0x5942, 0xD2F5, 0xC59B, 0x4E2C, 0xEB47, 0x60F0, 0x779E, 0xFC29, + 0x4BA8, 0xC01F, 0xD771, 0x5CC6, 0xF9AD, 0x721A, 0x6574, 0xEEC3, + 0xA415, 0x2FA2, 0x38CC, 0xB37B, 0x1610, 0x9DA7, 0x8AC9, 0x017E, + 0x1F65, 0x94D2, 0x83BC, 0x080B, 0xAD60, 0x26D7, 0x31B9, 0xBA0E, + 0xF0D8, 0x7B6F, 0x6C01, 0xE7B6, 0x42DD, 0xC96A, 0xDE04, 0x55B3 +}; + +__u16 crc_t10dif(const unsigned char *buffer, size_t len) +{ + __u16 crc = 0; + unsigned int i; + + for (i = 0 ; i < len ; i++) + crc = (crc << 8) ^ t10_dif_crc_table[((crc >> 8) ^ buffer[i]) & 0xff]; + + return crc; +} +EXPORT_SYMBOL(crc_t10dif); + +MODULE_DESCRIPTION("T10 DIF CRC calculation"); +MODULE_LICENSE("GPL"); -- cgit v1.2.2 From 9fa111372a54f695f65e0de2f2a2108fe6cf3584 Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Thu, 17 Jul 2008 17:38:17 +0200 Subject: ftrace: fix lockup with MAXSMP MAXSMP brings in lots of use of various bitops in smp_processor_id() and friends - causing ftrace to lock up during bootup: calling anon_inode_init+0x0/0x130 initcall anon_inode_init+0x0/0x130 returned 0 after 0 msecs calling acpi_event_init+0x0/0x57 [ hard hang ] So exclude the bitops facilities from tracing. Signed-off-by: Ingo Molnar --- lib/Makefile | 3 +++ 1 file changed, 3 insertions(+) (limited to 'lib') diff --git a/lib/Makefile b/lib/Makefile index 2c62a9c06fbe..d90d31102e05 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -15,6 +15,9 @@ CFLAGS_REMOVE_string.o = -pg CFLAGS_REMOVE_spinlock_debug.o = -pg CFLAGS_REMOVE_list_debug.o = -pg CFLAGS_REMOVE_debugobjects.o = -pg +CFLAGS_REMOVE_find_next_bit.o = -pg +CFLAGS_REMOVE_cpumask.o = -pg +CFLAGS_REMOVE_bitmap.o = -pg endif lib-$(CONFIG_MMU) += ioremap.o -- cgit v1.2.2 From 2464a609ded094204a3aed24823745ec58e3c879 Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Thu, 17 Jul 2008 17:40:48 +0200 Subject: ftrace: do not trace library functions make function tracing more robust: do not trace library functions. We've already got a sizable list of exceptions: ifdef CONFIG_FTRACE # Do not profile string.o, since it may be used in early boot or vdso CFLAGS_REMOVE_string.o = -pg # Also do not profile any debug utilities CFLAGS_REMOVE_spinlock_debug.o = -pg CFLAGS_REMOVE_list_debug.o = -pg CFLAGS_REMOVE_debugobjects.o = -pg CFLAGS_REMOVE_find_next_bit.o = -pg CFLAGS_REMOVE_cpumask.o = -pg CFLAGS_REMOVE_bitmap.o = -pg endif ... and the pattern has been that random library functionality showed up in ftrace's critical path (outside of its recursion check), causing hard to debug lockups. So be a bit defensive about it and exclude all lib/*.o functions by default. It's not that they are overly interesting for tracing purposes anyway. Specific ones can still be traced, in an opt-in manner. Signed-off-by: Ingo Molnar --- lib/Makefile | 17 +++++------------ 1 file changed, 5 insertions(+), 12 deletions(-) (limited to 'lib') diff --git a/lib/Makefile b/lib/Makefile index d90d31102e05..818c4d455518 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -2,24 +2,17 @@ # Makefile for some libs needed in the kernel. # +ifdef CONFIG_FTRACE +ORIG_CFLAGS := $(KBUILD_CFLAGS) +KBUILD_CFLAGS = $(subst -pg,,$(ORIG_CFLAGS)) +endif + lib-y := ctype.o string.o vsprintf.o cmdline.o \ rbtree.o radix-tree.o dump_stack.o \ idr.o int_sqrt.o extable.o prio_tree.o \ sha1.o irq_regs.o reciprocal_div.o argv_split.o \ proportions.o prio_heap.o ratelimit.o -ifdef CONFIG_FTRACE -# Do not profile string.o, since it may be used in early boot or vdso -CFLAGS_REMOVE_string.o = -pg -# Also do not profile any debug utilities -CFLAGS_REMOVE_spinlock_debug.o = -pg -CFLAGS_REMOVE_list_debug.o = -pg -CFLAGS_REMOVE_debugobjects.o = -pg -CFLAGS_REMOVE_find_next_bit.o = -pg -CFLAGS_REMOVE_cpumask.o = -pg -CFLAGS_REMOVE_bitmap.o = -pg -endif - lib-$(CONFIG_MMU) += ioremap.o lib-$(CONFIG_SMP) += cpumask.o -- cgit v1.2.2