Merge 'Linux v3.0' into Litmus

Some notes:
* Litmus^RT scheduling class is the topmost scheduling class
  (above stop_sched_class).
* scheduler_ipi() function (e.g., in smp_reschedule_interrupt())
  may increase IPI latencies.
* Added path into schedule() to quickly re-evaluate scheduling
  decision without becoming preemptive again. This used to be
  a standard path before the removal of BKL.

Conflicts:
	Makefile
	arch/arm/kernel/calls.S
	arch/arm/kernel/smp.c
	arch/x86/include/asm/unistd_32.h
	arch/x86/kernel/smp.c
	arch/x86/kernel/syscall_table_32.S
	include/linux/hrtimer.h
	kernel/printk.c
	kernel/sched.c
	kernel/sched_fair.c

1 files changed, 12 insertions, 0 deletions

diff --git a/include/net/udplite.h b/include/net/udplite.h
index afdffe607b24..673a024c6b2a 100644
--- a/include/net/udplite.h
+++ b/include/net/udplite.h
@@ -115,6 +115,18 @@ static inline __wsum udplite_csum_outgoing(struct sock *sk, struct sk_buff *skb)
         return csum;
 }
 
+static inline __wsum udplite_csum(struct sk_buff *skb)
+{
+        struct sock *sk = skb->sk;
+        int cscov = udplite_sender_cscov(udp_sk(sk), udp_hdr(skb));
+        const int off = skb_transport_offset(skb);
+        const int len = skb->len - off;
+
+        skb->ip_summed = CHECKSUM_NONE;     /* no HW support for checksumming */
+
+        return skb_checksum(skb, off, min(cscov, len), 0);
+}
+
 extern void     udplite4_register(void);
 extern int      udplite_get_port(struct sock *sk, unsigned short snum,
                         int (*scmp)(const struct sock *, const struct sock *));