linux-toradex.git/include/asm-sparc64, branch v2.6.25.20

sparc64: FUTEX_OP_ANDN fix

2008-08-20T18:15:29+00:00

[ Upstream commit d72609e17fd93bb2f7e0f7e1bdc70b6d20e43843 ]

Correct sparc64's implementation of FUTEX_OP_ANDN to do a
bitwise negate of the oparg parameter before applying the
AND operation. All other archs that support FUTEX_OP_ANDN
either negate oparg explicitly (frv, ia64, mips, sh, x86),
or do so indirectly by using an and-not instruction (powerpc).
Since sparc64 has and-not, I chose to use that solution.

I've not found any use of FUTEX_OP_ANDN in glibc so the
impact of this bug is probably minor. But other user-space
components may try to use it so it should still get fixed.

Signed-off-by: Mikael Pettersson 
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

sparc64: Do not define BIO_VMERGE_BOUNDARY.

2008-08-01T18:50:43+00:00

[ Upstream commit 74988bd85d1cb97987534fd7ffbc570e81145418 ]

The IOMMU code and the block layer can split things
up using different rules, so this can't work reliably.

Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

sparc: Fix debugger syscall restart interactions.

2008-05-15T14:50:06+00:00

[ This is a 2.6.25 backport of upstream changeset
  28e6103665301ce60634e8a77f0b657c6cc099de with sparc32 build
  fixes from Robert Reif ]

So, forever, we've had this ptrace_signal_deliver implementation
which tries to handle all of the nasties that can occur when the
debugger looks at a process about to take a signal.  It's meant
to address all of these issues inside of the kernel so that the
debugger need not be mindful of such things.

Problem is, this doesn't work.

The idea was that we should do the syscall restart business first, so
that the debugger captures that state.  Otherwise, if the debugger for
example saves the child's state, makes the child execute something
else, then restores the saved state, we won't handle the syscall
restart properly because we lose the "we're in a syscall" state.

The code here worked for most cases, but if the debugger actually
passes the signal through to the child unaltered, it's possible that
we would do a syscall restart when we shouldn't have.

In particular this breaks the case of debugging a process under a gdb
which is being debugged by yet another gdb.  gdb uses sigsuspend
to wait for SIGCHLD of the inferior, but if gdb itself is being
debugged by a top-level gdb we get a ptrace_stop().  The top-level gdb
does a PTRACE_CONT with SIGCHLD to let the inferior gdb see the
signal.  But ptrace_signal_deliver() assumed the debugger would cancel
out the signal and therefore did a syscall restart, because the return
error was ERESTARTNOHAND.

Fix this by simply making ptrace_signal_deliver() a nop, and providing
a way for the debugger to control system call restarting properly:

1) Report a "in syscall" software bit in regs->{tstate,psr}.
   It is set early on in trap entry to a system call and is fully
   visible to the debugger via ptrace() and regsets.

2) Test this bit right before doing a syscall restart.  We have
   to do a final recheck right after get_signal_to_deliver() in
   case the debugger cleared the bit during ptrace_stop().

3) Clear the bit in trap return so we don't accidently try to set
   that bit in the real register.

As a result we also get a ptrace_{is,clear}_syscall() for sparc32 just
like sparc64 has.

M68K has this same exact bug, and is now the only other user of the
ptrace_signal_deliver hook.  It needs to be fixed in the same exact
way as sparc.

Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

sparc: Fix mremap address range validation.

2008-05-15T14:50:05+00:00

Just like mmap, we need to validate address ranges regardless
of MAP_FIXED.

sparc{,64}_mmap_check()'s flag argument is unused, remove.

Based upon a report and preliminary patch by
Jan Lieskovsky 

Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

sparc: Fix ptrace() detach.

2008-05-15T14:50:05+00:00

[ Upstream commit: 986bef854fab44012df678a5b51817d5274d3ca1 ]

Forever we had a PTRACE_SUNOS_DETACH which was unconditionally
recognized, regardless of the personality of the process.

Unfortunately, this value is what ended up in the GLIBC sys/ptrace.h
header file on sparc as PTRACE_DETACH and PT_DETACH.

So continue to recognize this old value.  Luckily, it doesn't conflict
with anything we actually care about.

Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

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

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6

2008-03-27T01:35:22+00:00

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
  [SPARC64]: Define TASK_SIZE_OF()
  [SPARC64]: flush_ptrace_access() needs preemption disable.
  [SPARC64]: Update defconfig.
  [SPARC64]: Fix allnoconfig build, ptrace.c missing CONFIG_COMPAT checks.
  [SPARC64]: Fix __get_cpu_var in preemption-enabled area.
  [SPARC64]: Fix sparse warnings in arch/sparc64/kernel/signal.c
  [SPARC64]: Fix most sparse warnings in arch/sparc64/kernel/sys_sparc.c
  [SPARC64]: Fix sparse warnings in arch/sparc64/kernel/time.c
  [SPARC64]: Fix sparse warnings in arch/sparc64/kernel/ptrace.c
  [SPARC64]: Fix sparse warnings in arch/sparc64/kernel/irq.c
  [SPARC64]: Fix sparse warnings in arch/sparc64/kernel/iommu.c
  [SPARC64]: Fix sparse errors in arch/sparc64/kernel/traps.c
  [SPARC64]: Fix sparse warnings in arch/sparc64/kernel/{cpu,setup}.c
  [SPARC64]: Adjust {TLBTEMP,TSBMAP}_BASE.
  [SPARC64]: Make save_stack_trace() more efficient.

[SPARC64]: Define TASK_SIZE_OF()

2008-03-27T00:32:33+00:00

This make "cat /proc/${PID}/pagemap" more efficient for
32-bit tasks.

Based upon a report by Mariusz Kozlowski.

Signed-off-by: David S. Miller

[SPARC64]: Fix sparse warnings in arch/sparc64/kernel/time.c

2008-03-26T08:11:55+00:00

Signed-off-by: David S. Miller

[SPARC64]: Fix sparse warnings in arch/sparc64/kernel/irq.c

2008-03-26T07:37:51+00:00

Signed-off-by: David S. Miller