linux-toradex.git/arch/um, branch v2.6.18.3

[PATCH] uml: remove warnings added by previous -stable patch

2006-11-04T01:33:48+00:00

Add needed includes for syscall() function, also to remove warnings spit out by
GCC; they were added by previous -stable patch, and at least on my system
(Ubuntu x86-64) these warnings do show up.

Signed-off-by: Paolo 'Blaisorblade' Giarrusso 
Signed-off-by: Greg Kroah-Hartman 
Signed-off-by: Chris Wright

[PATCH] uml: make Uml compile on FC6 kernel headers

2006-11-04T01:33:48+00:00

I need this patch to get a UML kernel to compile.  This is with the kernel
headers in FC6 which are automatically generated from the kernel tree.
Some headers are missing but those files don't need them.  At least it
appears so since the resulting kernel works fine.

Tested on x86-64.

Signed-off-by: Ulrich Drepper 
Cc: Jeff Dike 
Cc: Paolo 'Blaisorblade' Giarrusso 
Signed-off-by: Andrew Morton 
Signed-off-by: Greg Kroah-Hartman 
Signed-off-by: Chris Wright

UML: Fix UML build failure

2006-10-13T20:23:20+00:00

don't know if the following is already queued, it fixes an ARCH=um build
failure, evidence here:
http://marc.theaimsgroup.com/?l=linux-kernel&m=115875912525137&w=2
and following thread.
Cc-ing uml maintainers and I hope I didn't follow too many
Submitting-patches rules...

The patch is taken from:
http://user-mode-linux.sourceforge.net/work/current/2.6/2.6.18/patches/no-syscallx

Since the syscallx macros seem to be under threat, this patch stops
using them, using syscall instead.

Acked-by: Jeff Dike 
Signed-off-by: Greg Kroah-Hartman

uml: use DEFCONFIG_LIST to avoid reading host's config

2006-10-13T20:23:20+00:00

This should make sure that, for UML, host's configuration files are not
considered, which avoids various pains to the user. Our dependency are such that
the obtained Kconfig will be valid and will lead to successful compilation -
however they cannot prevent an user from disabling any boot device, and if an
option is not set in the read .config (say /boot/config-XXX), with make
menuconfig ARCH=um, it is not set. This always disables UBD and all console I/O
channels, which leads to non-working UML kernels, so this bothers users -
especially now, since it will happen on almost every machine
(/boot/config-`uname -r` exists almost on every machine). It can be workarounded
with make defconfig ARCH=um, but it is non-obvious and can be avoided, so please
_do_ merge this patch.

Signed-off-by: Paolo 'Blaisorblade' Giarrusso 
Acked-by: Jeff Dike 
Signed-off-by: Greg Kroah-Hartman

uml: allow using again x86/x86_64 crypto code

2006-10-13T20:23:20+00:00

Enable compilation of x86_64 crypto code;, and add the needed constant
to make the code compile again (that macro was added to i386 asm-offsets
between 2.6.17 and 2.6.18, in 6c2bb98bc33ae33c7a33a133a4cd5a06395fece5).

Signed-off-by: Paolo 'Blaisorblade' Giarrusso 
Acked-by: Jeff Dike 
Signed-off-by: Greg Kroah-Hartman

[PATCH] vDSO hash-style fix

2006-07-31T20:28:43+00:00

The latest toolchains can produce a new ELF section in DSOs and
dynamically-linked executables.  The new section ".gnu.hash" replaces
".hash", and allows for more efficient runtime symbol lookups by the
dynamic linker.  The new ld option --hash-style={sysv|gnu|both} controls
whether to produce the old ".hash", the new ".gnu.hash", or both.  In some
new systems such as Fedora Core 6, gcc by default passes --hash-style=gnu
to the linker, so that a standard invocation of "gcc -shared" results in
producing a DSO with only ".gnu.hash".  The new ".gnu.hash" sections need
to be dealt with the same way as ".hash" sections in all respects; only the
dynamic linker cares about their contents.  To work with older dynamic
linkers (i.e.  preexisting releases of glibc), a binary must have the old
".hash" section.  The --hash-style=both option produces binaries that a new
dynamic linker can use more efficiently, but an old dynamic linker can
still handle.

The new section runs afoul of the custom linker scripts used to build vDSO
images for the kernel.  On ia64, the failure mode for this is a boot-time
panic because the vDSO's PT_IA_64_UNWIND segment winds up ill-formed.

This patch addresses the problem in two ways.

First, it mentions ".gnu.hash" in all the linker scripts alongside ".hash".
 This produces correct vDSO images with --hash-style=sysv (or old tools),
with --hash-style=gnu, or with --hash-style=both.

Second, it passes the --hash-style=sysv option when building the vDSO
images, so that ".gnu.hash" is not actually produced.  This is the most
conservative choice for compatibility with any old userland.  There is some
concern that some ancient glibc builds (though not any known old production
system) might choke on --hash-style=both binaries.  The optimizations
provided by the new style of hash section do not really matter for a DSO
with a tiny number of symbols, as the vDSO has.  If someone wants to use
=gnu or =both for their vDSO builds and worry less about that
compatibility, just change the option and the linker script changes will
make any choice work fine.

Signed-off-by: Roland McGrath 
Cc: "Luck, Tony" 
Cc: Kyle McMartin 
Cc: Paul Mackerras 
Cc: Benjamin Herrenschmidt 
Cc: Jeff Dike 
Cc: Andi Kleen 
Cc: Sam Ravnborg 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] UML - fix utsname build breakage

2006-07-15T21:42:24+00:00

Some -mm-only material leaked into a patch destined for mainline, and I didn't
notice.

This was the replacement of system_utsname with utsname() that's required by
the uts namespace patch.  This patch reverts those changes (which are correct
in -mm) so that mainline UML builds again.

Signed-off-by: Jeff Dike 
Signed-off-by: Linus Torvalds

[PATCH] uml: header formatting cleanups

2006-07-15T04:53:52+00:00

Clean up whitespace and return syntax in os.h.

Signed-off-by: Jeff Dike 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] uml: tidy biarch gcc support

2006-07-15T04:53:52+00:00

On top of the previous biarch changes for UML, this makes the preprocessor
changes a bit cleaner.  Specify the 64-bit build in CPPFLAGS on the x86_64
SUBARCH, rather than #undef'ing i386.  Compile-tested with i386 and x86_64
SUBARCHs.

Signed-off-by: Nishanth Aravamudan 
Signed-off-by: Jeff Dike 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] uml: tidy longjmp macro

2006-07-15T04:53:52+00:00

The UML_SETJMP macro was requiring its users to pass in a argument which it
could supply itself, since it wasn't used outside that invocation of the
macro.

Signed-off-by: Jeff Dike 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds