Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial
* git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial: fixed path to moved file in include/linux/device.h Fix spelling in E1000_DISABLE_PACKET_SPLIT Kconfig description Documentation/dvb/get_dvb_firmware: fix firmware URL Documentation: Update to BUG-HUNTING Remove superfluous NOTIFY_COOKIE_LEN define add "tags" to .gitignore Fix "frist", "fisrt", typos fix rwlock usage example It's UTF-8
This commit is contained in:
Linus Torvalds
commit
8b4b6707ee
1
.gitignore
vendored
1
.gitignore
vendored
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@ -16,6 +16,7 @@
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#
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# Top-level generic files
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#
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tags
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vmlinux*
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System.map
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Module.symvers
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@ -1,3 +1,56 @@
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Table of contents
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=================
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Last updated: 20 December 2005
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Contents
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========
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- Introduction
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- Devices not appearing
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- Finding patch that caused a bug
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-- Finding using git-bisect
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-- Finding it the old way
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- Fixing the bug
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Introduction
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============
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Always try the latest kernel from kernel.org and build from source. If you are
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not confident in doing that please report the bug to your distribution vendor
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instead of to a kernel developer.
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Finding bugs is not always easy. Have a go though. If you can't find it don't
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give up. Report as much as you have found to the relevant maintainer. See
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MAINTAINERS for who that is for the subsystem you have worked on.
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Before you submit a bug report read REPORTING-BUGS.
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Devices not appearing
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=====================
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Often this is caused by udev. Check that first before blaming it on the
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kernel.
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Finding patch that caused a bug
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===============================
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Finding using git-bisect
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------------------------
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Using the provided tools with git makes finding bugs easy provided the bug is
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reproducible.
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Steps to do it:
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- start using git for the kernel source
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- read the man page for git-bisect
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- have fun
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Finding it the old way
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----------------------
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[Sat Mar 2 10:32:33 PST 1996 KERNEL_BUG-HOWTO lm@sgi.com (Larry McVoy)]
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This is how to track down a bug if you know nothing about kernel hacking.
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@ -90,3 +143,63 @@ it does work and it lets non-hackers help fix bugs. And it is cool
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because Linux snapshots will let you do this - something that you can't
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do with vendor supplied releases.
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Fixing the bug
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==============
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Nobody is going to tell you how to fix bugs. Seriously. You need to work it
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out. But below are some hints on how to use the tools.
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To debug a kernel, use objdump and look for the hex offset from the crash
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output to find the valid line of code/assembler. Without debug symbols, you
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will see the assembler code for the routine shown, but if your kernel has
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debug symbols the C code will also be available. (Debug symbols can be enabled
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in the kernel hacking menu of the menu configuration.) For example:
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objdump -r -S -l --disassemble net/dccp/ipv4.o
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NB.: you need to be at the top level of the kernel tree for this to pick up
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your C files.
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If you don't have access to the code you can also debug on some crash dumps
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e.g. crash dump output as shown by Dave Miller.
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> EIP is at ip_queue_xmit+0x14/0x4c0
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> ...
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> Code: 44 24 04 e8 6f 05 00 00 e9 e8 fe ff ff 8d 76 00 8d bc 27 00 00
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> 00 00 55 57 56 53 81 ec bc 00 00 00 8b ac 24 d0 00 00 00 8b 5d 08
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> <8b> 83 3c 01 00 00 89 44 24 14 8b 45 28 85 c0 89 44 24 18 0f 85
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>
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> Put the bytes into a "foo.s" file like this:
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>
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> .text
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> .globl foo
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> foo:
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> .byte .... /* bytes from Code: part of OOPS dump */
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>
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> Compile it with "gcc -c -o foo.o foo.s" then look at the output of
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> "objdump --disassemble foo.o".
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>
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> Output:
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>
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> ip_queue_xmit:
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> push %ebp
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> push %edi
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> push %esi
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> push %ebx
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> sub $0xbc, %esp
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> mov 0xd0(%esp), %ebp ! %ebp = arg0 (skb)
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> mov 0x8(%ebp), %ebx ! %ebx = skb->sk
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> mov 0x13c(%ebx), %eax ! %eax = inet_sk(sk)->opt
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Another very useful option of the Kernel Hacking section in menuconfig is
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Debug memory allocations. This will help you see whether data has been
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initialised and not set before use etc. To see the values that get assigned
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with this look at mm/slab.c and search for POISON_INUSE. When using this an
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Oops will often show the poisoned data instead of zero which is the default.
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Once you have worked out a fix please submit it upstream. After all open
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source is about sharing what you do and don't you want to be recognised for
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your genius?
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Please do read Documentation/SubmittingPatches though to help your code get
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accepted.
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@ -246,7 +246,7 @@ sub vp7041 {
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}
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sub dibusb {
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my $url = "http://www.linuxtv.org/downloads/firmware/dvb-dibusb-5.0.0.11.fw";
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my $url = "http://www.linuxtv.org/downloads/firmware/dvb-usb-dibusb-5.0.0.11.fw";
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my $outfile = "dvb-dibusb-5.0.0.11.fw";
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my $hash = "fa490295a527360ca16dcdf3224ca243";
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@ -9,9 +9,9 @@ when using discs encoded using Microsoft's Joliet extensions.
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iocharset=name Character set to use for converting from Unicode to
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ASCII. Joliet filenames are stored in Unicode format, but
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Unix for the most part doesn't know how to deal with Unicode.
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There is also an option of doing UTF8 translations with the
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There is also an option of doing UTF-8 translations with the
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utf8 option.
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utf8 Encode Unicode names in UTF8 format. Default is no.
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utf8 Encode Unicode names in UTF-8 format. Default is no.
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Mount options unique to the isofs filesystem.
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block=512 Set the block size for the disk to 512 bytes
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@ -6,7 +6,7 @@ The following mount options are supported:
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iocharset=name Character set to use for converting from Unicode to
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ASCII. The default is to do no conversion. Use
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iocharset=utf8 for UTF8 translations. This requires
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iocharset=utf8 for UTF-8 translations. This requires
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CONFIG_NLS_UTF8 to be set in the kernel .config file.
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iocharset=none specifies the default behavior explicitly.
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@ -28,16 +28,16 @@ iocharset=name -- Character set to use for converting between the
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know how to deal with Unicode.
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By default, FAT_DEFAULT_IOCHARSET setting is used.
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There is also an option of doing UTF8 translations
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There is also an option of doing UTF-8 translations
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with the utf8 option.
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NOTE: "iocharset=utf8" is not recommended. If unsure,
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you should consider the following option instead.
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utf8=<bool> -- UTF8 is the filesystem safe version of Unicode that
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utf8=<bool> -- UTF-8 is the filesystem safe version of Unicode that
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is used by the console. It can be be enabled for the
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filesystem with this option. If 'uni_xlate' gets set,
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UTF8 gets disabled.
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UTF-8 gets disabled.
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uni_xlate=<bool> -- Translate unhandled Unicode characters to special
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escaped sequences. This would let you backup and
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@ -9,7 +9,7 @@ removed soon. So for any new code dynamic initialization should be used:
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static int __init xxx_init(void)
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{
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spin_lock_init(&xxx_lock);
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rw_lock_init(&xxx_rw_lock);
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rwlock_init(&xxx_rw_lock);
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...
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}
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@ -326,7 +326,7 @@ EXPORT_SYMBOL_GPL(platform_device_register);
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* platform_device_unregister - unregister a platform-level device
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* @pdev: platform device we're unregistering
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*
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* Unregistration is done in 2 steps. Fisrt we release all resources
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* Unregistration is done in 2 steps. First we release all resources
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* and remove it from the subsystem, then we drop reference count by
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* calling platform_device_put().
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*/
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@ -2137,7 +2137,7 @@ static void start_io( ctlr_info_t *h)
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break;
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}
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/* Get the frist entry from the Request Q */
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/* Get the first entry from the Request Q */
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removeQ(&(h->reqQ), c);
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h->Qdepth--;
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@ -1914,7 +1914,7 @@ config E1000_DISABLE_PACKET_SPLIT
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depends on E1000
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help
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Say Y here if you want to use the legacy receive path for PCI express
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hadware.
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hardware.
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If in doubt, say N.
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@ -1404,7 +1404,7 @@ add_claw_reads(struct net_device *dev, struct ccwbk* p_first,
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if ( privptr-> p_read_active_first ==NULL ) {
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#ifdef DEBUGMSG
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printk(KERN_INFO "%s:%s p_read_active_frist == NULL \n",
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printk(KERN_INFO "%s:%s p_read_active_first == NULL \n",
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dev->name,__FUNCTION__);
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printk(KERN_INFO "%s:%s Read active first/last changed \n",
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dev->name,__FUNCTION__);
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@ -902,7 +902,7 @@ static int megasas_reset_bus_host(struct scsi_cmnd *scmd)
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int ret;
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/*
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* Frist wait for all commands to complete
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* First wait for all commands to complete
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*/
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ret = megasas_generic_reset(scmd);
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@ -561,7 +561,7 @@ befs_utf2nls(struct super_block *sb, const char *in,
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* @sb: Superblock
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* @src: Input string buffer in NLS format
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* @srclen: Length of input string in bytes
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* @dest: The output string in UTF8 format
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* @dest: The output string in UTF-8 format
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* @destlen: Length of the output buffer
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*
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* Converts input string @src, which is in the format of the loaded NLS map,
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@ -160,7 +160,7 @@ improperly zeroed buffer in CIFS Unix extensions set times call.
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Version 1.25
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------------
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Fix internationalization problem in cifs readdir with filenames that map to
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longer UTF8 strings than the string on the wire was in Unicode. Add workaround
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longer UTF-8 strings than the string on the wire was in Unicode. Add workaround
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for readdir to netapp servers. Fix search rewind (seek into readdir to return
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non-consecutive entries). Do not do readdir when server negotiates
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buffer size to small to fit filename. Add support for reading POSIX ACLs from
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@ -114,7 +114,7 @@ static inline int fat_get_entry(struct inode *dir, loff_t *pos,
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}
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/*
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* Convert Unicode 16 to UTF8, translated Unicode, or ASCII.
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* Convert Unicode 16 to UTF-8, translated Unicode, or ASCII.
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* If uni_xlate is enabled and we can't get a 1:1 conversion, use a
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* colon as an escape character since it is normally invalid on the vfat
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* filesystem. The following four characters are the hexadecimal digits
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@ -1101,7 +1101,7 @@ static int parse_options(char *options, int is_vfat, int silent, int *debug,
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return -EINVAL;
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}
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}
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/* UTF8 doesn't provide FAT semantics */
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/* UTF-8 doesn't provide FAT semantics */
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if (!strcmp(opts->iocharset, "utf8")) {
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printk(KERN_ERR "FAT: utf8 is not a recommended IO charset"
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" for FAT filesystems, filesystem will be case sensitive!\n");
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@ -11,7 +11,7 @@
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#include "isofs.h"
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/*
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* Convert Unicode 16 to UTF8 or ASCII.
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* Convert Unicode 16 to UTF-8 or ASCII.
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*/
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static int
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uni16_to_x8(unsigned char *ascii, u16 *uni, int len, struct nls_table *nls)
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@ -491,7 +491,7 @@ config NLS_KOI8_U
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(koi8-u) and Belarusian (koi8-ru) character sets.
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config NLS_UTF8
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tristate "NLS UTF8"
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tristate "NLS UTF-8"
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depends on NLS
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help
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If you want to display filenames with native language characters
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@ -77,7 +77,7 @@ struct termios {
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#define IXANY 0004000 /* Any character will restart after stop. */
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#define IXOFF 0010000 /* Enable start/stop input control. */
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#define IMAXBEL 0020000 /* Ring bell when input queue is full. */
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#define IUTF8 0040000 /* Input is UTF8 */
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#define IUTF8 0040000 /* Input is UTF-8 */
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/* c_oflag bits */
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#define OPOST 0000001 /* Perform output processing. */
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@ -400,7 +400,7 @@ extern struct device * get_device(struct device * dev);
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extern void put_device(struct device * dev);
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/* drivers/base/power.c */
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/* drivers/base/power/shutdown.c */
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extern void device_shutdown(void);
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@ -199,7 +199,7 @@ struct fat_mount_options {
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sys_immutable:1, /* set = system files are immutable */
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dotsOK:1, /* set = hidden and system files are named '.filename' */
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isvfat:1, /* 0=no vfat long filename support, 1=vfat support */
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utf8:1, /* Use of UTF8 character set (Default) */
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utf8:1, /* Use of UTF-8 character set (Default) */
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unicode_xlate:1, /* create escape sequences for unhandled Unicode */
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numtail:1, /* Does first alias have a numeric '~1' type tail? */
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atari:1, /* Use Atari GEMDOS variation of MS-DOS fs */
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@ -51,7 +51,6 @@
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#define HARD_MSGMAX (131072/sizeof(void*))
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#define DFLT_MSGSIZEMAX 8192 /* max message size */
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#define NOTIFY_COOKIE_LEN 32
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struct ext_wait_queue { /* queue of sleeping tasks */
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struct task_struct *task;
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