linux-stable.git/arch/frv/kernel, branch linux-3.6.y

frv: Add missing RCU idle APIs on idle loop

2012-10-12T20:50:30+00:00

commit 41d8fe5bb3cf91ce2716ac8f43e4b40d802a99c8 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 the Frv's idle loop.

Reported-by: Paul E. McKenney 
Signed-off-by: Frederic Weisbecker 
Cc: David Howells 
Acked-by: David Howells 
Reviewed-by: Josh Triplett 
Signed-off-by: Greg Kroah-Hartman

arch: remove direct definitions of KERN_ uses

2012-07-31T00:25:13+00:00

Add #include  so that the #define KERN_ macros
don't have to be duplicated.

Signed-off-by: Joe Perches 
Cc: Kay Sievers 
Cc: Russell King 
Cc: Kay Sievers 
Acked-by: David Howells 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

frv: Remove bogus closing parenthesis

2012-06-02T14:38:19+00:00

Introduced by commit 6fd84c0831ec78d98736b76dc5e9b849f1dbfc9e
("TIF_RESTORE_SIGMASK can be set only when TIF_SIGPENDING is set")

Signed-off-by: Geert Uytterhoeven 
Signed-off-by: Al Viro

FRV: Optimise the system call exit path in entry.S [ver #2]

2012-06-01T16:59:38+00:00

Optimise the system call exit path in entry.S by packing some instructions.

Suggested-by: Al Viro 
Signed-off-by: David Howells 
Signed-off-by: Al Viro

FRV: Shrink TIF_WORK_MASK [ver #2]

2012-06-01T16:59:37+00:00

Shrink TIF_WORK_MASK so that it will fit in the 12-bit signed immediate
operand field of an ANDI instruction.

Suggested-by: Al Viro 
Signed-off-by: David Howells 
Signed-off-by: Al Viro

FRV: Prevent syscall exit tracing and notify_resume at end of kernel exceptions

2012-06-01T16:59:18+00:00

Move the test for kernel mode processing from do_signal() into entry.S to also
prevent system call exit tracing and userspace resumption notification handling
happening when returning from kernel exceptions.

Reported-by: Al Viro 
Signed-off-by: David Howells 
Signed-off-by: Al Viro

new helper: signal_delivered()

2012-06-01T16:58:52+00:00

Does block_sigmask() + tracehook_signal_handler();  called when
sigframe has been successfully built.  All architectures converted
to it; block_sigmask() itself is gone now (merged into this one).

I'm still not too happy with the signature, but that's a separate
story (IMO we need a structure that would contain signal number +
siginfo + k_sigaction, so that get_signal_to_deliver() would fill one,
signal_delivered(), handle_signal() and probably setup...frame() -
take one).

Signed-off-by: Al Viro

most of set_current_blocked() callers want SIGKILL/SIGSTOP removed from set

2012-06-01T16:58:51+00:00

Only 3 out of 63 do not.  Renamed the current variant to __set_current_blocked(),
added set_current_blocked() that will exclude unblockable signals, switched
open-coded instances to it.

Signed-off-by: Al Viro

TIF_RESTORE_SIGMASK can be set only when TIF_SIGPENDING is set

2012-06-01T16:58:50+00:00

Signed-off-by: Al Viro

don't call try_to_freeze() from do_signal()

2012-06-01T16:58:49+00:00

get_signal_to_deliver() will handle it itself

Signed-off-by: Al Viro