linux-stable.git/include/asm-v850, branch linux-2.6.25.y

kvm: provide kvm.h for all architecture: fixes headers_install

2008-04-02T22:28:18+00:00

Currently include/linux/kvm.h is not considered by make headers_install,
because Kbuild cannot handle " unifdef-$(CONFIG_FOO) += foo.h.  This problem
was introduced by

commit fb56dbb31c4738a3918db81fd24da732ce3b4ae6
Author: Avi Kivity 
Date:   Sun Dec 2 10:50:06 2007 +0200

    KVM: Export include/linux/kvm.h only if $ARCH actually supports KVM

    Currently, make headers_check barfs due to , which 
    includes, not existing.  Rather than add a zillion s, export kvm.
    only if the arch actually supports it.

    Signed-off-by: Avi Kivity 

which makes this an 2.6.25 regression.

One way of solving the issue is to enhance Kbuild, but Avi and David conviced
me, that changing headers_install is not the way to go.  This patch changes
the definition for linux/kvm.h to unifdef-y.

If  unifdef-y is used for linux/kvm.h "make headers_check" will fail on all
architectures without asm/kvm.h.  Therefore, this patch also provides
asm/kvm.h on all architectures.

Signed-off-by: Christian Borntraeger 
Acked-by: Avi Kivity 
Cc: Sam Ravnborg 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Add pgtable_t to remaining nommu architectures

2008-02-09T19:08:33+00:00

The pte_fn_t in include/linux/mm.h make it necessary for all architectures
to define a pgtable_t type, even those that do not have an mmu.

Signed-off-by: Martin Schwidefsky 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

avoid overflows in kernel/time.c

2008-02-08T17:22:39+00:00

When the conversion factor between jiffies and milli- or microseconds is
not a single multiply or divide, as for the case of HZ == 300, we currently
do a multiply followed by a divide.  The intervening result, however, is
subject to overflows, especially since the fraction is not simplified (for
HZ == 300, we multiply by 300 and divide by 1000).

This is exposed to the user when passing a large timeout to poll(), for
example.

This patch replaces the multiply-divide with a reciprocal multiplication on
32-bit platforms.  When the input is an unsigned long, there is no portable
way to do this on 64-bit platforms there is no portable way to do this
since it requires a 128-bit intermediate result (which gcc does support on
64-bit platforms but may generate libgcc calls, e.g.  on 64-bit s390), but
since the output is a 32-bit integer in the cases affected, just simplify
the multiply-divide (*3/10 instead of *300/1000).

The reciprocal multiply used can have off-by-one errors in the upper half
of the valid output range.  This could be avoided at the expense of having
to deal with a potential 65-bit intermediate result.  Since the intent is
to avoid overflow problems and most of the other time conversions are only
semiexact, the off-by-one errors were considered an acceptable tradeoff.

At Ralf Baechle's suggestion, this version uses a Perl script to compute
the necessary constants.  We already have dependencies on Perl for kernel
compiles.  This does, however, require the Perl module Math::BigInt, which
is included in the standard Perl distribution starting with version 5.8.0.
In order to support older versions of Perl, include a table of canned
constants in the script itself, and structure the script so that
Math::BigInt isn't required if pulling values from said table.

Running the script requires that the HZ value is available from the
Makefile.  Thus, this patch also adds the Kconfig variable CONFIG_HZ to the
architectures which didn't already have it (alpha, cris, frv, h8300, m32r,
m68k, m68knommu, sparc, v850, and xtensa.) It does *not* touch the sh or
sh64 architectures, since Paul Mundt has dealt with those separately in the
sh tree.

Signed-off-by: H. Peter Anvin 
Cc: Ralf Baechle ,
Cc: Sam Ravnborg ,
Cc: Paul Mundt ,
Cc: Richard Henderson ,
Cc: Michael Starvik ,
Cc: David Howells ,
Cc: Yoshinori Sato ,
Cc: Hirokazu Takata ,
Cc: Geert Uytterhoeven ,
Cc: Roman Zippel ,
Cc: William L. Irwin ,
Cc: Chris Zankel ,
Cc: H. Peter Anvin ,
Cc: Jan Engelhardt 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

asm-*/posix_types.h: scrub GLIBC

2008-02-08T17:22:34+00:00

Some arches (like alpha and ia64) already have a clean posix_types.h header.
This brings all the others in line by removing all references to __GLIBC__
(and some undocumented __USE_ALL).

Signed-off-by: Mike Frysinger 
Acked-by: Ingo Molnar 
Cc: Ulrich Drepper 
Cc: Roland McGrath 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Add cmpxchg_local to v850

2008-02-07T16:42:33+00:00

Use the new generic cmpxchg_local (disables interrupt). Also use the generic
cmpxchg as fallback if SMP is not set.

Signed-off-by: Mathieu Desnoyers 
Cc: Miles Bader 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Sanitize the type of struct user.u_ar0

2008-02-07T16:42:30+00:00

struct user.u_ar0 is defined to contain a pointer offset on all
architectures in which it is defined (all architectures which define an
a.out format except SPARC.) However, it has a pointer type in the headers,
which is pointless --  is not exported to userspace, and it
just makes the code messy.

Redefine the field as "unsigned long" (which is the same size as a pointer
on all Linux architectures) and change the setting code to user offsetof()
instead of hand-coded arithmetic.

Cc: Linux Arch Mailing List 
Cc: Bryan Wu 
Cc: Roman Zippel 
Cc: Thomas Gleixner 
Cc: Ingo Molnar 
Cc: Richard Henderson 
Cc: Ivan Kokshaysky 
Cc: Russell King 
Cc: Lennert Buytenhek 
Cc: Håvard Skinnemoen 
Cc: Mikael Starvik 
Cc: Yoshinori Sato 
Cc: Tony Luck 
Cc: Hirokazu Takata 
Cc: Ralf Baechle 
Cc: Paul Mackerras 
Cc: Martin Schwidefsky 
Cc: Heiko Carstens 
Cc: Paul Mundt 
Signed-off-by: H. Peter Anvin 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Cleanup asm/{elf,page,user}.h: #ifdef KERNEL is no longer needed

2008-02-07T16:42:30+00:00

asm/elf.h, asm/page.h and asm/user.h don't export to userspace now, so we can
drop #ifdef __KERNEL__ for them.

[k.shutemov@gmail.com: remove #ifdef __KERNEL_]
Signed-off-by: Kirill A. Shutemov 
Reviewed-by: David Woodhouse 
Cc: 
Signed-off-by: Kirill A. Shutemov 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

remove mm_{ptov,vtop}()

2008-02-06T18:41:01+00:00

This patch removes the unused mm_{ptov,vtop}().

Signed-off-by: Adrian Bunk 
Acked-by: Greg Ungerer 
Acked-by: Bryan Wu 
Cc: Miles Bader 
Cc: Yoshinori Sato 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[NET]: Introducing socket mark socket option.

2008-02-01T03:27:19+00:00

A userspace program may wish to set the mark for each packets its send
without using the netfilter MARK target. Changing the mark can be used
for mark based routing without netfilter or for packet filtering.

It requires CAP_NET_ADMIN capability.

Signed-off-by: Laszlo Attila Toth 
Acked-by: Patrick McHardy 
Signed-off-by: David S. Miller

Add CONFIG_DEBUG_SG sg validation

2007-10-22T19:20:03+00:00

Add a Kconfig entry which will toggle some sanity checks on the sg
entry and tables.

Signed-off-by: Jens Axboe