We always linked vmliux.o.
Remove init/built-in.o dependency so we avoid this
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>

Signed-off-by: NAndres Salomon <dilinger@debian.org>
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>

PowerPC will start moving board defconfigs into subarch-specific
subdirs soon.  "make help" currently does not look in subdirs to
find the defconfigs to show.  This is partially a good thing,
since there are way too many defconfigs for one list.

This patch makes the main "make help" display something like

  help-40x         - Show 40x-specific targets
  help-44x         - Show 44x-specific targets
  help-boards      - Show all of the above

and wires up stuff so those new help-* commands actually work.

[sam: fixed it up to display x86 defconfigs too]
Cc: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Signed-off-by: NSegher Boessenkool <segher@kernel.crashing.org>
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>

Signed-off-by: NUwe Kleine-König <Uwe.Kleine-Koenig@digi.com>
Cc: trivial@kernel.org
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>

Add option to enable -Wframe-larger-than= on gcc 4.4

gcc mainline (upcoming 4.4) added a new -Wframe-larger-than=...
option to warn at build time about too large stack frames. Add a config
option to enable this warning, since this very useful for the kernel.

I choose (somewhat arbitarily) 2048 as default warning threshold for 64bit
and 1024 as default for 32bit architectures.  With some research and
fixing all the code for smaller values these defaults should be probably
lowered.

With the default allyesconfigs have some new warnings, but I think
that is all code that should be just fixed.

At some point (when gcc 4.4 is released and widely used) this should
obsolete make checkstack
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>

Steps to reproduce:

	vi -t NETFILTER
Signed-off-by: NAlexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>

This snuck in through 919ee677
("[SPARC64]: Add NUMA support")
Signed-off-by: NSebastian Siewior <sebastian@breakpoint.cc>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Currently there is only code to parse NUMA attributes on
sun4v/niagara systems, but later on we will add such parsing
for older systems.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

It should be "if" but is written as "is"..
Signed-off-by: NUwe Kleine-Koenig <Uwe.Kleine-Koenig@digi.com>
Signed-off-by: NJesper Juhl <jesper.juhl@gmail.com>

The module alias support in the kernel have a consistency
check where it is checked that the size of a structure
in the kernel and on the build host are the same.
For cross builds this check does not make sense so detect
when we do cross builds and silently skip the check in these
situations.
This fixes a build bug for a wireless driver when cross building
for arm.
Acked-by: NMichael Buesch <mb@bu3sch.de>
Tested-by: NGordon Farquharson <gordonfarquharson@gmail.com>
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>
Cc: stable@kernel.org

Ingo Molnar wrote:
>
> i've got a build log from a weird build error below:
>
>   LD      init/built-in.o
> distcc[12023] ERROR: compile (null) on localhost failed
> make: *** [vmlinux.o] Error 1
> make: *** Waiting for unfinished jobs....
>   LD      .tmp_vmlinux1
>

Building vmlinux.o were moved up in the dependency chain so we started
to build it before the kallsym stuff. This was done to let modpost
report section mismatch bugs even when the final link failed.

Originally I had expected the dependency of $(kallsyms.o) to
cover this but it turns out that we need to be even more explicit.
Fix this by adding a conditional dependency on firat target
used in the kallsyms serie of builds.
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Roland McGrath <roland@redhat.com>

Arjan van de Ven <arjan@infradead.org> wrote:
===
I just read the excellent LWN writeup of the vmsplice
security thing, and that got me wondering why this attack
wasn't stopped by the CONFIG_CC_STACKPROTECTOR option...
because it plain should have been...

Some analysis later.. it turns out that the following line
in the top level Makefile, added by you in October 2007,
entirely disables CONFIG_CC_STACKPROTECTOR ;(
With this line removed the exploit will be nicely stopped.

CFLAGS          += $(call cc-option, -fno-stack-protector)

Now I realize that certain distros have patched gcc to
compensate for their lack of distro wide CFLAGS, and it's
great to work around that... but would there be a way to NOT
disable this for CONFIG_CC_STACKPROTECTOR please?
It would have made this exploit not possible for those kernels
that enable this feature (and that includes distros like Fedora)
===

Move the assignment to KBUILD_CFLAGS up before including
the arch specific Makefile so arch makefiles may override
the setting.
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>
Cc: Arjan van de Ven <arjan@infradead.org>
Cc: stable@kernel.org

.. and I really need to call it something else.  Maybe it is time to
bring back the weasel series, since weasels always make me feel good
about a kernel.

Signed-off-by: NRobert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: NAdrian Bunk <bunk@kernel.org>

link vmlinux.o so we may report section mismatch bugs before
we start with the real link - that may error out.
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>

Setting the option DEBUG_SECTION_MISMATCH will
report additional section mismatch'es but this
should in the end makes it possible to get rid of
all of them.

See help text in lib/Kconfig.debug for details.
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>

The output of 'make help' covers a lot of options, but doesn't include
a listing for 'make prepare'.  Here's a one-liner to fix that...
Signed-off-by: NValdis Kletnieks <valdis.kletnieks@vt.edu>
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>

With this patch I'm able to find the definition of _xmit_lock defined in
include/linux/netdevice.h as follows:

	struct net_device {
		...
		spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
	}

Otherwise this counts as definition of ____cacheline_aligned_in_smp.
Signed-off-by: NUwe Kleine-König <Uwe.Kleine-Koenig@digi.com>
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>

Signed-off-by: NRobert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>

When multiple built-in modules (especially drivers) provide the same
capability, they're prioritized by link order specified by the order
listed in Makefile.  This implicit ordering is lost for loadable
modules.

When driver modules are loaded by udev, what comes first in
modules.alias file is selected.  However, the order in this file is
indeterministic (depends on filesystem listing order of installed
modules).  This causes confusion.

The solution is two-parted.  This patch updates kbuild such that it
generates and installs modules.order which contains the name of
modules ordered according to Makefile.  The second part is update to
depmod such that it generates output files according to this file.

Note that both obj-y and obj-m subdirs can contain modules and
ordering information between those two are lost from beginning.
Currently obj-y subdirs are put before obj-m subdirs.

Sam Ravnborg cleaned up Makefile modifications and suggested using awk
to remove duplicate lines from modules.order instead of using separate
C program.
Signed-off-by: NTejun Heo <htejun@gmail.com>
Acked-by: NGreg Kroah-Hartman <gregkh@suse.de>
Cc: Bill Nottingham <notting@redhat.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Cc: Jon Masters <jonathan@jonmasters.org>
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>

Add missing $(srctree)/ prefix for scripts used by the includecheck and
versioncheck make targets
Signed-off-by: NGeert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>

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

Add 'includecheck' to the Static analyzers help list.
Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>

Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Change two occurances of "behavour" to "behaviour".
Signed-off-by: NLinus Nilsson <lajnold@acc.umu.se>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

The check introduced in commit:
4f1127e2 "kbuild: fix
infinite make recursion"

caused certain external modules not to build and
also caused 'make targz-pkg' to fail.
This is a minimal fix so we revert to previous
behaviour - but we do not overwrite the Makefile
in the top-level directory.
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>
Tested-by: NJay Cliburn <jacliburn@bellsouth.net>
Cc: Jay Cliburn <jacliburn@bellsouth.net>