linux-toradex.git/arch/um/kernel, branch tegra

um: clean arch_ptrace() up a bit

2011-09-15T01:09:37+00:00

1) take subarch-specific stuff to subarch_ptrace()
2) PTRACE_{PEEK,POKE}{TEXT,DATA} is handled by ptrace_request() just fine...

Signed-off-by: Al Viro 
Signed-off-by: Richard Weinberger 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

um: Save FPU registers between task switches

2011-09-15T01:09:37+00:00

Some time ago Jeff prepared 42daba316557 ("uml: stop saving process FP
state") for UML to stop saving the process FP state between task
switches.  The assumption was that since with SKAS0 every guest process
runs inside a host process context the host OS will take care of keeping
the proper FP state.

Unfortunately this is not true for multi-threaded applications, where
all guest threads share a single host process context yet all may use
the FPU on their own.  Although I haven't verified it I suspect things
to be even worse in SKAS3 mode where all guest processes run inside a
single host process.

The patch reintroduces the saving and restoring of the FP context
between task switches.

[richard@nod.at: Ingo posted this patch in 2009, sadly it was never applied
and got lost. Now in 2011 the problem was reported by Gunnar.]

Signed-off-by: Ingo van Lil 
Signed-off-by: Richard Weinberger 
Reported-by: 
Tested-by: 
Cc: Stanislav Meduna 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

um: remove dead code

2011-07-26T03:57:13+00:00

GCC 4.6's -Wunused-but-set-variable found some dead code.

Signed-off-by: Richard Weinberger 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

um, exec: remove redundant set_fs(USER_DS)

2011-07-26T03:57:12+00:00

The address limit is already set in flush_old_exec() so this
set_fs(USER_DS) is redundant.

Signed-off-by: Mathias Krause 
Cc: Richard Weinberger 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

um: print info about fatal segfaults

2011-05-25T15:39:41+00:00

Print a short info about fatal segfaults like other archs do.

Signed-off-by: Richard Weinberger 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

um: add earlyprintk support

2011-05-25T15:39:41+00:00

User Mode Linux can also benefit from earlyprintk.  UML's earlyprintk
writes kernel messages directly to stdout.

Signed-off-by: Richard Weinberger 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

mm: now that all old mmu_gather code is gone, remove the storage

2011-05-25T15:39:16+00:00

Fold all the mmu_gather rework patches into one for submission

Signed-off-by: Peter Zijlstra 
Reported-by: Hugh Dickins 
Cc: Benjamin Herrenschmidt 
Cc: David Miller 
Cc: Martin Schwidefsky 
Cc: Russell King 
Cc: Paul Mundt 
Cc: Jeff Dike 
Cc: Richard Weinberger 
Cc: Tony Luck 
Cc: KAMEZAWA Hiroyuki 
Cc: Mel Gorman 
Cc: KOSAKI Motohiro 
Cc: Nick Piggin 
Cc: Namhyung Kim 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

sched: Provide scheduler_ipi() callback in response to smp_send_reschedule()

2011-04-14T06:52:32+00:00

For future rework of try_to_wake_up() we'd like to push part of that
function onto the CPU the task is actually going to run on.

In order to do so we need a generic callback from the existing scheduler IPI.

This patch introduces such a generic callback: scheduler_ipi() and
implements it as a NOP.

BenH notes: PowerPC might use this IPI on offline CPUs under rare conditions!

Acked-by: Russell King 
Acked-by: Martin Schwidefsky 
Acked-by: Chris Metcalf 
Acked-by: Jesper Nilsson 
Acked-by: Benjamin Herrenschmidt 
Signed-off-by: Ralf Baechle 
Reviewed-by: Frank Rowand 
Cc: Mike Galbraith 
Cc: Nick Piggin 
Cc: Linus Torvalds 
Cc: Andrew Morton 
Signed-off-by: Ingo Molnar 
Signed-off-by: Peter Zijlstra 
Link: http://lkml.kernel.org/r/20110405152728.744338123@chello.nl

um: Use generic show_interrupts()

2011-03-24T19:35:57+00:00

Signed-off-by: Thomas Gleixner

um: Convert genirq namespace

2011-03-24T19:35:57+00:00

Scripted with coccinelle.

Signed-off-by: Thomas Gleixner