linux-toradex.git/arch/score/kernel, branch v3.4.73

score: Add missing RCU idle APIs on idle loop

2012-10-12T20:38:55+00:00

commit 0ee23fda59740767324b4340247ca41a2f498ca6 upstream.

In the old times, the whole idle task was considered
as an RCU quiescent state. But as RCU became more and
more successful overtime, some RCU read side critical
section have been added even in the code of some
architectures idle tasks, for tracing for example.

So nowadays, rcu_idle_enter() and rcu_idle_exit() must
be called by the architecture to tell RCU about the part
in the idle loop that doesn't make use of rcu read side
critical sections, typically the part that puts the CPU
in low power mode.

This is necessary for RCU to find the quiescent states in
idle in order to complete grace periods.

Add this missing pair of calls in scores's idle loop.

Reported-by: Paul E. McKenney 
Signed-off-by: Frederic Weisbecker 
Cc: Chen Liqin 
Cc: Lennox Wu 
Signed-off-by: Paul E. McKenney 
Reviewed-by: Josh Triplett 
Signed-off-by: Greg Kroah-Hartman

sched/rt: Use schedule_preempt_disabled()

2012-03-01T09:28:03+00:00

Coccinelle based conversion.

Signed-off-by: Thomas Gleixner 
Acked-by: Peter Zijlstra 
Link: http://lkml.kernel.org/n/tip-24swm5zut3h9c4a6s46x8rws@git.kernel.org
Signed-off-by: Ingo Molnar

score: fix off-by-one index into syscall table

2012-01-23T16:38:49+00:00

If the provided system call number is equal to __NR_syscalls, the
current check will pass and a function pointer just after the system
call table may be called, since sys_call_table is an array with total
size __NR_syscalls.

Whether or not this is a security bug depends on what the compiler puts
immediately after the system call table.  It's likely that this won't do
anything bad because there is an additional NULL check on the syscall
entry, but if there happens to be a non-NULL value immediately after the
system call table, this may result in local privilege escalation.

Signed-off-by: Dan Rosenberg 
Cc: 
Cc: Chen Liqin 
Cc: Lennox Wu 
Cc: Eugene Teo 
Cc: Arnd Bergmann 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

score: Use HAVE_MEMBLOCK_NODE_MAP

2011-12-08T18:22:09+00:00

score used early_node_map[] just to prime free_area_init_nodes().  Now
memblock can be used for the same purpose and early_node_map[] is
scheduled to be dropped.  Use memblock instead.

Signed-off-by: Tejun Heo 
Cc: Benjamin Herrenschmidt 
Cc: Yinghai Lu 
Cc: Chen Liqin 
Cc: Lennox Wu

modules: make arch's use default loader hooks

2011-07-24T12:36:04+00:00

This patch removes all the module loader hook implementations in the
architecture specific code where the functionality is the same as that
now provided by the recently added default hooks.

Signed-off-by: Jonas Bonn 
Acked-by: Mike Frysinger 
Acked-by: Geert Uytterhoeven 
Tested-by: Michal Simek 
Signed-off-by: Rusty Russell

score: Use generic show_interrupts()

2011-03-28T04:03:35+00:00

Signed-off-by: Thomas Gleixner 
Acked-by: Chen Liqin

score: Convert to new irq function names

2011-03-28T04:03:33+00:00

Scripted with coccinelle.

Signed-off-by: Thomas Gleixner 
Acked-by: Chen Liqin

score: Convert irq_chip to new functions

2011-03-28T04:00:56+00:00

Use the proper accessor functions in show_interrupts() while at it.

Signed-off-by: Thomas Gleixner 
Acked-by: Chen Liqin

ptrace: cleanup arch_ptrace() on score

2010-10-28T01:03:12+00:00

Remove unnecessary castings.

Signed-off-by: Namhyung Kim 
Cc: Chen Liqin 
Cc: Lennox Wu 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

ptrace: change signature of arch_ptrace()

2010-10-28T01:03:10+00:00

Fix up the arguments to arch_ptrace() to take account of the fact that
@addr and @data are now unsigned long rather than long as of a preceding
patch in this series.

Signed-off-by: Namhyung Kim 
Cc: 
Acked-by: Roland McGrath 
Acked-by: David Howells 
Acked-by: Geert Uytterhoeven 
Acked-by: David S. Miller 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds