Merge branch 'linux-2.6'

8 files changed, 107 insertions, 50 deletions

diff --git a/Documentation/SubmitChecklist b/Documentation/SubmitChecklist
index 2270efa1015..bfbb2718a27 100644
--- a/Documentation/SubmitChecklist
+++ b/Documentation/SubmitChecklist
@@ -72,3 +72,7 @@ kernel patches.
 
     If the new code is substantial, addition of subsystem-specific fault
     injection might be appropriate.
+
+22: Newly-added code has been compiled with `gcc -W'.  This will generate
+    lots of noise, but is good for finding bugs like "warning: comparison
+    between signed and unsigned".
diff --git a/Documentation/SubmittingPatches b/Documentation/SubmittingPatches
index 302d148c2e1..b0d0043f7c4 100644
--- a/Documentation/SubmittingPatches
+++ b/Documentation/SubmittingPatches
@@ -134,9 +134,9 @@ Do not send more than 15 patches at once to the vger mailing lists!!!
 
 
 Linus Torvalds is the final arbiter of all changes accepted into the
-Linux kernel.  His e-mail address is <torvalds@osdl.org>.  He gets
-a lot of e-mail, so typically you should do your best to -avoid- sending
-him e-mail.
+Linux kernel.  His e-mail address is <torvalds@linux-foundation.org>. 
+He gets a lot of e-mail, so typically you should do your best to -avoid-
+sending him e-mail. 
 
 Patches which are bug fixes, are "obvious" changes, or similarly
 require little discussion should be sent or CC'd to Linus.  Patches
diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt
index fc532395d11..0ba6af02cda 100644
--- a/Documentation/feature-removal-schedule.txt
+++ b/Documentation/feature-removal-schedule.txt
@@ -318,3 +318,10 @@ Why:	/proc/acpi/button has been replaced by events to the input layer
 Who:	Len Brown <len.brown@intel.com>
 
 ---------------------------
+
+What:	JFFS (version 1)
+When:	2.6.21
+Why:	Unmaintained for years, superceded by JFFS2 for years.
+Who:	Jeff Garzik <jeff@garzik.org>
+
+---------------------------
diff --git a/Documentation/filesystems/9p.txt b/Documentation/filesystems/9p.txt
index 43b89c214d2..4d075a4558f 100644
--- a/Documentation/filesystems/9p.txt
+++ b/Documentation/filesystems/9p.txt
@@ -73,8 +73,22 @@ OPTIONS
 RESOURCES
 =========
 
-The Linux version of the 9p server is now maintained under the npfs project
-on sourceforge (http://sourceforge.net/projects/npfs).
+Our current recommendation is to use Inferno (http://www.vitanuova.com/inferno)
+as the 9p server.  You can start a 9p server under Inferno by issuing the
+following command:
+   ; styxlisten -A tcp!*!564 export '#U*'
+
+The -A specifies an unauthenticated export.  The 564 is the port # (you may
+have to choose a higher port number if running as a normal user).  The '#U*'
+specifies exporting the root of the Linux name space.  You may specify a
+subset of the namespace by extending the path: '#U*'/tmp would just export
+/tmp.  For more information, see the Inferno manual pages covering styxlisten
+and export.
+
+A Linux version of the 9p server is now maintained under the npfs project
+on sourceforge (http://sourceforge.net/projects/npfs).  There is also a
+more stable single-threaded version of the server (named spfs) available from
+the same CVS repository.
 
 There are user and developer mailing lists available through the v9fs project
 on sourceforge (http://sourceforge.net/projects/v9fs).
@@ -96,5 +110,5 @@ STATUS
 
 The 2.6 kernel support is working on PPC and x86.
 
-PLEASE USE THE SOURCEFORGE BUG-TRACKER TO REPORT PROBLEMS.
+PLEASE USE THE KERNEL BUGZILLA TO REPORT PROBLEMS. (http://bugzilla.kernel.org)
 
diff --git a/Documentation/i386/boot.txt b/Documentation/i386/boot.txt
index 9575de300a6..38fe1f03fb1 100644
--- a/Documentation/i386/boot.txt
+++ b/Documentation/i386/boot.txt
@@ -2,7 +2,7 @@
 		     ----------------------------
 
 		    H. Peter Anvin <hpa@zytor.com>
-			Last update 2006-11-17
+			Last update 2007-01-26
 
 On the i386 platform, the Linux kernel uses a rather complicated boot
 convention.  This has evolved partially due to historical aspects, as
@@ -186,6 +186,7 @@ filled out, however:
 	7  GRuB
 	8  U-BOOT
 	9  Xen
+	A  Gujin
 
 	Please contact <hpa@zytor.com> if you need a bootloader ID
 	value assigned.
diff --git a/Documentation/kdump/kdump.txt b/Documentation/kdump/kdump.txt
index 5af6676a88f..07330681834 100644
--- a/Documentation/kdump/kdump.txt
+++ b/Documentation/kdump/kdump.txt
@@ -17,7 +17,7 @@ You can use common Linux commands, such as cp and scp, to copy the
 memory image to a dump file on the local disk, or across the network to
 a remote system.
 
-Kdump and kexec are currently supported on the x86, x86_64, ppc64 and IA64
+Kdump and kexec are currently supported on the x86, x86_64, ppc64 and ia64
 architectures.
 
 When the system kernel boots, it reserves a small section of memory for
@@ -61,7 +61,12 @@ Install kexec-tools
 
 2) Download the kexec-tools user-space package from the following URL:
 
-http://www.kernel.org/pub/linux/kernel/people/horms/kexec-tools/kexec-tools-testing-20061214.tar.gz
+http://www.kernel.org/pub/linux/kernel/people/horms/kexec-tools/kexec-tools-testing.tar.gz
+
+This is a symlink to the latest version, which at the time of writing is
+20061214, the only release of kexec-tools-testing so far. As other versions
+are made released, the older onese will remain available at
+http://www.kernel.org/pub/linux/kernel/people/horms/kexec-tools/
 
 Note: Latest kexec-tools-testing git tree is available at
 
@@ -71,11 +76,11 @@ http://www.kernel.org/git/?p=linux/kernel/git/horms/kexec-tools-testing.git;a=su
 
 3) Unpack the tarball with the tar command, as follows:
 
-   tar xvpzf kexec-tools-testing-20061214.tar.gz
+   tar xvpzf kexec-tools-testing.tar.gz
 
-4) Change to the kexec-tools-1.101 directory, as follows:
+4) Change to the kexec-tools directory, as follows:
 
-   cd kexec-tools-testing-20061214
+   cd kexec-tools-testing-VERSION
 
 5) Configure the package, as follows:
 
@@ -224,7 +229,23 @@ Dump-capture kernel config options (Arch Dependent, ppc64)
 
 Dump-capture kernel config options (Arch Dependent, ia64)
 ----------------------------------------------------------
-(To be filled)
+
+- No specific options are required to create a dump-capture kernel
+  for ia64, other than those specified in the arch idependent section
+  above. This means that it is possible to use the system kernel
+  as a dump-capture kernel if desired.
+
+  The crashkernel region can be automatically placed by the system
+  kernel at run time. This is done by specifying the base address as 0,
+  or omitting it all together.
+
+  crashkernel=256M@0
+  or
+  crashkernel=256M
+
+  If the start address is specified, note that the start address of the
+  kernel will be aligned to 64Mb, so if the start address is not then
+  any space below the alignment point will be wasted.
 
 
 Boot into System Kernel
@@ -243,6 +264,10 @@ Boot into System Kernel
 
    On ppc64, use "crashkernel=128M@32M".
 
+   On ia64, 256M@256M is a generous value that typically works.
+   The region may be automatically placed on ia64, see the
+   dump-capture kernel config option notes above.
+
 Load the Dump-capture Kernel
 ============================
 
@@ -261,7 +286,8 @@ For x86_64:
 For ppc64:
 	- Use vmlinux
 For ia64:
-	(To be filled)
+	- Use vmlinux or vmlinuz.gz
+
 
 If you are using a uncompressed vmlinux image then use following command
 to load dump-capture kernel.
@@ -277,18 +303,19 @@ to load dump-capture kernel.
    --initrd=<initrd-for-dump-capture-kernel> \
    --append="root=<root-dev> <arch-specific-options>"
 
+Please note, that --args-linux does not need to be specified for ia64.
+It is planned to make this a no-op on that architecture, but for now
+it should be omitted
+
 Following are the arch specific command line options to be used while
 loading dump-capture kernel.
 
-For i386 and x86_64:
+For i386, x86_64 and ia64:
 	"init 1 irqpoll maxcpus=1"
 
 For ppc64:
 	"init 1 maxcpus=1 noirqdistrib"
 
-For IA64
-	(To be filled)
-
 
 Notes on loading the dump-capture kernel:
 
diff --git a/Documentation/sysrq.txt b/Documentation/sysrq.txt
index e0188a23fd5..61613166981 100644
--- a/Documentation/sysrq.txt
+++ b/Documentation/sysrq.txt
@@ -1,6 +1,6 @@
 Linux Magic System Request Key Hacks
-Documentation for sysrq.c version 1.15
-Last update: $Date: 2001/01/28 10:15:59 $
+Documentation for sysrq.c
+Last update: 2007-JAN-06
 
 *  What is the magic SysRq key?
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -35,7 +35,7 @@ You can set the value in the file by the following command:
 
 Note that the value of /proc/sys/kernel/sysrq influences only the invocation
 via a keyboard. Invocation of any operation via /proc/sysrq-trigger is always
-allowed.
+allowed (by a user with admin privileges).
 
 *  How do I use the magic SysRq key?
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -58,7 +58,7 @@ On PowerPC - Press 'ALT - Print Screen (or F13) - <command key>,
 On other - If you know of the key combos for other architectures, please
            let me know so I can add them to this section.
 
-On all -  write a character to /proc/sysrq-trigger.  eg:
+On all -  write a character to /proc/sysrq-trigger.  e.g.:
 
 		echo t > /proc/sysrq-trigger
 
@@ -74,6 +74,8 @@ On all -  write a character to /proc/sysrq-trigger.  eg:
 
 'c'	- Will perform a kexec reboot in order to take a crashdump.
 
+'d'	- Shows all locks that are held.
+
 'o'     - Will shut your system off (if configured and supported).
 
 's'     - Will attempt to sync all mounted filesystems.
@@ -87,38 +89,43 @@ On all -  write a character to /proc/sysrq-trigger.  eg:
 
 'm'     - Will dump current memory info to your console.
 
+'n'	- Used to make RT tasks nice-able
+
 'v'	- Dumps Voyager SMP processor info to your console.
 
+'w'	- Dumps tasks that are in uninterruptable (blocked) state.
+
+'x'	- Used by xmon interface on ppc/powerpc platforms.
+
 '0'-'9' - Sets the console log level, controlling which kernel messages
           will be printed to your console. ('0', for example would make
           it so that only emergency messages like PANICs or OOPSes would
           make it to your console.)
 
-'f'	- Will call oom_kill to kill a memory hog process
+'f'	- Will call oom_kill to kill a memory hog process.
 
 'e'     - Send a SIGTERM to all processes, except for init.
 
-'i'     - Send a SIGKILL to all processes, except for init.
+'g'	- Used by kgdb on ppc platforms.
 
-'l'     - Send a SIGKILL to all processes, INCLUDING init. (Your system
-          will be non-functional after this.)
+'i'     - Send a SIGKILL to all processes, except for init.
 
-'h'     - Will display help ( actually any other key than those listed
+'h'     - Will display help (actually any other key than those listed
           above will display help. but 'h' is easy to remember :-)
 
 *  Okay, so what can I use them for?
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 Well, un'R'aw is very handy when your X server or a svgalib program crashes.
 
-sa'K' (Secure Access Key) is useful when you want to be sure there are no
-trojan program is running at console and which could grab your password
-when you would try to login. It will kill all programs on given console
-and thus letting you make sure that the login prompt you see is actually
+sa'K' (Secure Access Key) is useful when you want to be sure there is no
+trojan program running at console which could grab your password
+when you would try to login. It will kill all programs on given console,
+thus letting you make sure that the login prompt you see is actually
 the one from init, not some trojan program.
 IMPORTANT: In its true form it is not a true SAK like the one in a :IMPORTANT
 IMPORTANT: c2 compliant system, and it should not be mistaken as   :IMPORTANT
 IMPORTANT: such.                                                   :IMPORTANT
-       It seems other find it useful as (System Attention Key) which is
+       It seems others find it useful as (System Attention Key) which is
 useful when you want to exit a program that will not let you switch consoles.
 (For example, X or a svgalib program.)
 
@@ -139,8 +146,8 @@ OK or Done message...)
 Again, the unmount (remount read-only) hasn't taken place until you see the
 "OK" and "Done" message appear on the screen.
 
-The loglevel'0'-'9' is useful when your console is being flooded with
-kernel messages you do not want to see. Setting '0' will prevent all but
+The loglevels '0'-'9' are useful when your console is being flooded with
+kernel messages you do not want to see. Selecting '0' will prevent all but
 the most urgent kernel messages from reaching your console. (They will
 still be logged if syslogd/klogd are alive, though.)
 
@@ -152,7 +159,7 @@ processes.
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 That happens to me, also. I've found that tapping shift, alt, and control
 on both sides of the keyboard, and hitting an invalid sysrq sequence again
-will fix the problem. (ie, something like alt-sysrq-z). Switching to another
+will fix the problem. (i.e., something like alt-sysrq-z). Switching to another
 virtual console (ALT+Fn) and then back again should also help.
 
 *  I hit SysRq, but nothing seems to happen, what's wrong?
@@ -174,11 +181,11 @@ handler function you will use, B) a help_msg string, that will print when SysRQ
 prints help, and C) an action_msg string, that will print right before your
 handler is called. Your handler must conform to the prototype in 'sysrq.h'.
 
-After the sysrq_key_op is created, you can call the macro 
-register_sysrq_key(int key, struct sysrq_key_op *op_p) that is defined in
-sysrq.h, this will register the operation pointed to by 'op_p' at table
-key 'key', if that slot in the table is blank. At module unload time, you must
-call the macro unregister_sysrq_key(int key, struct sysrq_key_op *op_p), which
+After the sysrq_key_op is created, you can call the kernel function
+register_sysrq_key(int key, struct sysrq_key_op *op_p); this will
+register the operation pointed to by 'op_p' at table key 'key',
+if that slot in the table is blank. At module unload time, you must call
+the function unregister_sysrq_key(int key, struct sysrq_key_op *op_p), which
 will remove the key op pointed to by 'op_p' from the key 'key', if and only if
 it is currently registered in that slot. This is in case the slot has been
 overwritten since you registered it.
@@ -186,15 +193,12 @@ overwritten since you registered it.
 The Magic SysRQ system works by registering key operations against a key op
 lookup table, which is defined in 'drivers/char/sysrq.c'. This key table has
 a number of operations registered into it at compile time, but is mutable,
-and 4 functions are exported for interface to it: __sysrq_lock_table,
-__sysrq_unlock_table, __sysrq_get_key_op, and __sysrq_put_key_op. The
-functions __sysrq_swap_key_ops and __sysrq_swap_key_ops_nolock are defined
-in the header itself, and the REGISTER and UNREGISTER macros are built from
-these. More complex (and dangerous!) manipulations of the table are possible
-using these functions, but you must be careful to always lock the table before
-you read or write from it, and to unlock it again when you are done. (And of
-course, to never ever leave an invalid pointer in the table). Null pointers in
-the table are always safe :)
+and 2 functions are exported for interface to it:
+	register_sysrq_key and unregister_sysrq_key.
+Of course, never ever leave an invalid pointer in the table. I.e., when
+your module that called register_sysrq_key() exits, it must call
+unregister_sysrq_key() to clean up the sysrq key table entry that it used.
+Null pointers in the table are always safe. :)
 
 If for some reason you feel the need to call the handle_sysrq function from
 within a function called by handle_sysrq, you must be aware that you are in
diff --git a/Documentation/usb/CREDITS b/Documentation/usb/CREDITS
index 01e7f857ef3..27a721635f9 100644
--- a/Documentation/usb/CREDITS
+++ b/Documentation/usb/CREDITS
@@ -21,7 +21,7 @@ difficult to maintain, add yourself with a patch if desired.
   Bill Ryder <bryder@sgi.com>
   Thomas Sailer <sailer@ife.ee.ethz.ch>
   Gregory P. Smith <greg@electricrain.com>
-  Linus Torvalds <torvalds@osdl.org>
+  Linus Torvalds <torvalds@linux-foundation.org>
   Roman Weissgaerber <weissg@vienna.at>
   <Kazuki.Yasumatsu@fujixerox.co.jp>