In order to encourage people to notice when they break the exported
headers, add a config option which automatically runs the sanity checks
when building vmlinux.  That way, those who use allyesconfig will notice
failures.
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Merge window closed..

Not all architectures have a file named 'defconfig' (e.g.  powerpc).
However the make TAGS and make tags targets search such files for tags,
causing an error message when they don't exist.  This patch addresses the
problem by instructing xargs not to run the tags program if there are no
matching files.
Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>
Cc: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Make checkstack work for UML.  We need to pass the underlying architecture
name, rather than "um" to checkstack.pl.
Signed-off-by: NJeff Dike <jdike@addtoit.com>
Acked-by: NMatt Mackall <mpm@selenic.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

Add distclean info, that was previously missing, to 'make help'.
Also add a few more details to the 'make clean' help text.
Signed-off-by: NJesper Juhl <jesper.juhl@gmail.com>
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>

The attached patch clarifies the creation of KERNELRELEASE and
corrects an error regarding the use of $(LOCALVERSION).
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>

The following patch extends kbuild/defconfig tags support to exuberant
ctags.  The previous support is only for emacs ctags/etags programs.

This patch also corrects the kconfig regex for the emacs invocation.
Previously it would miss some instances because it assumed /^config
instead of /^[ \t]*config
Signed-off-by: NAron Griffis <aron@hp.com>
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>

Clarify the use of "make C=" in the top-level Makefile, and fix a
typo in the Documentation file.
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>

Signed-off-by: NSam Ravnborg <sam@ravnborg.org>

Align filenames for SYSMAP with other filenames
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>

Do not specify -rR anymore - it is default.
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>

tell why a a target got build
   enabled by make V=2
      Output (listed in the order they are checked):
         (1) - due to target is PHONY
         (2) - due to target missing
         (3) - due to: file1.h file2.h
         (4) - due to command line change
         (5) - due to missing .cmd file
         (6) - due to target not in $(targets)
(1) We always build PHONY targets
(2) No target, so we better build it
(3) Prerequisite is newer than target
(4) The command line stored in the file named dir/.target.cmd
    differed from actual command line. This happens when compiler
    options changes
(5) No dir/.target.cmd file (used to store command line)
(6) No dir/.target.cmd file and target not listed in $(targets)
    This is a good hint that there is a bug in the kbuild file

This patch is inspired by a patch from: Milton Miller <miltonm@bga.com>

Cc: Milton Miller <miltonm@bga.com>
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>

Based on patch from: Magnus Damm <magnus@valinux.co.jp>
This has the advantage that all section mismatch checks are run regardless
of modules being enabled or not.

When running modpost on vmlinux output:
MODPOST vmlinux

When running modpost on modules output count of modules like this:
MODPOST 5 modules
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>

Let headers_install use in-kernel unifdef
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>

Install headers for _all_ architectures, suitable for making a tarball
release or extracting them for use in a separate package.
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

Re-export header files only if either they or their controlling Kbuild
file has actually changed. Also allow for similar dependencies with
'headers_check', once we properly create the dependencies for those.
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

For architectures which don't have the include/asm-$(ARCH)/Kbuild file,
like ARM26, UM, etc.
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

Ahoy, all land-lubbers, test me out right smartly!
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>
Cc: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

`make headers_check' wants to go and write stuff in /lib/modules, which
requires root, whic is unfortunate.

In fact, there's no _particular_ reason for headers_install to put it there
either -- it can go into a subdirectory of the build tree in both cases.
It's not intended to go directly into /usr/include, which is why we didn't
put it there -- and we certainly don't want people screwing around with
symlinking to it.  It's for distributors to take away and do stuff with, so
leaving it in $(objtree) is fine, even in the headers_install case.

I picked $(objtree)/usr/include but I have no _particular_ preference
for that; it just seemed reasonable.
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>
Cc: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

One last time..

Some architectures change $CC in arch/$(ARCH)/Makefile
mips is one example.

That have impact on what options are supported by gcc so move all
$(call cc-option, ...) after include of arch specific Makefile.
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>

external modules needs include/linux/autoconf.h and include/config/auto.conf
but skip the integrity test of these. Even with a newer Kconfig file we
shall just proceed since external modules simply uses the kernel source and
shall not attempt to modify it.
Error out if a config fiel is missing since they are mandatory.
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>

Ubuntu gcc has hardcoded -fstack-protector - but does not understand
-fno-stack-protector-all. So only try -fno-stack-protector.
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>

Signed-off-by: NSam Ravnborg <sam@ravnborg.org>

Finishing up for the kernel summit. Ottawa, here I come.
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

It's all good.

Fix a typo in the toplevel makefile.
Signed-off-by: NAndreas Schwab <schwab@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

include/linux/version.h contained both actual KERNEL version
and UTS_RELEASE that contains a subset from git SHA1 for when
kernel was compiled as part of a git repository.
This had the unfortunate side-effect that all files including version.h
would be recompiled when some git changes was made due to changes SHA1.
Split it out so we keep independent parts in separate files.

Also update checkversion.pl script to no longer check for UTS_RELEASE.
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>

Ubuntu has enabled -fstack-protector per default in gcc
breaking kernel build. Explicit turn it off for now.
Later we may decide to make it configurable if the
kernel starts to support it.
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>

Minor documentation change on allowing checkers besides sparse

This patch cleans up a couple of mentions of sparse in the inline
toplevel Makefile documentation such that it's clear that other checkers
besides sparse can override CHECK and CHECKFLAGS.
Signed-off-by: NDustin Kirkland <dustin.kirkland@us.ibm.com>
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>

kbuild used $¤(*F to get filename of target without extension.
This was used in several places all over kbuild, but introducing
make -rR broke his for all cases where we specified full path to
target/prerequsite. It is assumed that make -rR disables old style
suffix-rules which is why is suddenly failed.

ia64 was impacted by this change because several div* routines in
arch/ia64/lib are build using explicit paths and then kbuild failed.

Thanks to David Mosberger-Tang <David.Mosberger@acm.org> for an explanation
what was the root-cause and for testing on ia64.

This patch also fixes two uses of $(*F) in arch/um
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>

Signed-off-by: NSam Ravnborg <sam@ravnborg.org>

I'm using TAGS generated from "make TAGS" to read the kernel source code.

When I met a ifdef block

	  #ifdef CONFIG_FOO
	  	 ...
	  #endif

in the soruce code I would like to know the meaning CONFIG_FOO
to decide whether I should read inside the ifdef block
or not. meaning CONFIG_FOO is well documented in Kconfig.
So it is nice if I can jump to CONFIG_FOO entry in Kconfig
from "#ifdef CONFIG_FOO" with the tag jump.

Here is the patch to add symbols in Kconfig and defconfig to TAGS
in "make TAGS" operation.
Signed-off-by: NMasatake YAMATO <jet@gyve.org>
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>

Here is a patch that adds a new -T option to genksyms for generating dumps of
the type definition that makes up the symbol version hashes. This allows to
trace modversion changes back to what caused them. The dump format is the
name of the type defined, followed by its definition (which is almost C):

  s#list_head struct list_head { s#list_head * next , * prev ; }

The s#, u#, e#, and t# prefixes stand for struct, union, enum, and typedef.
The exported symbols do not define types, and thus do not have an x# prefix:

  nfs4_acl_get_whotype int nfs4_acl_get_whotype ( char * , t#u32 )

The symbol type defintion of a single file can be generated with:

  make fs/jbd/journal.symtypes

If KBUILD_SYMTYPES is defined, all the *.symtypes of all object files that
export symbols are generated.

The single *.symtypes files can be combined into a single file after a kernel
build with a script like the following:

for f in $(find -name '*.symtypes' | sort); do
    f=${f#./}
    echo "/* ${f%.symtypes}.o */"
    cat $f
    echo
done \
| sed -e '\:UNKNOWN:d' \
      -e 's:[,;] }:}:g' \
      -e 's:\([[({]\) :\1:g' \
      -e 's: \([])},;]\):\1:g' \
      -e 's: $::' \
      $f \
| awk '
/^.#/   { if (defined[$1] == $0) {
            print $1
            next
          }
          defined[$1] = $0
        }
        { print }
'

When the kernel ABI changes, diffing individual *.symtype files, or the
combined files, against each other will show which symbol changes caused the
ABI changes. This can save a tremendous amount of time.

Dump the types that make up modversions
Signed-off-by: NAndreas Gruenbacher <agruen@suse.de>
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>