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, 43 insertions, 1 deletions

diff --git a/include/xen/grant_table.h b/include/xen/grant_table.h
index 9a731706a016..b1fab6b5b3ef 100644
--- a/include/xen/grant_table.h
+++ b/include/xen/grant_table.h
@@ -37,10 +37,16 @@
 #ifndef __ASM_GNTTAB_H__
 #define __ASM_GNTTAB_H__
 
-#include <asm/xen/hypervisor.h>
+#include <asm/page.h>
+
+#include <xen/interface/xen.h>
 #include <xen/interface/grant_table.h>
+
+#include <asm/xen/hypervisor.h>
 #include <asm/xen/grant_table.h>
 
+#include <xen/features.h>
+
 /* NR_GRANT_FRAMES must be less than or equal to that configured in Xen */
 #define NR_GRANT_FRAMES 4
 
@@ -107,6 +113,37 @@ void gnttab_grant_foreign_access_ref(grant_ref_t ref, domid_t domid,
 void gnttab_grant_foreign_transfer_ref(grant_ref_t, domid_t domid,
                                        unsigned long pfn);
 
+static inline void
+gnttab_set_map_op(struct gnttab_map_grant_ref *map, phys_addr_t addr,
+                  uint32_t flags, grant_ref_t ref, domid_t domid)
+{
+        if (flags & GNTMAP_contains_pte)
+                map->host_addr = addr;
+        else if (xen_feature(XENFEAT_auto_translated_physmap))
+                map->host_addr = __pa(addr);
+        else
+                map->host_addr = addr;
+
+        map->flags = flags;
+        map->ref = ref;
+        map->dom = domid;
+}
+
+static inline void
+gnttab_set_unmap_op(struct gnttab_unmap_grant_ref *unmap, phys_addr_t addr,
+                    uint32_t flags, grant_handle_t handle)
+{
+        if (flags & GNTMAP_contains_pte)
+                unmap->host_addr = addr;
+        else if (xen_feature(XENFEAT_auto_translated_physmap))
+                unmap->host_addr = __pa(addr);
+        else
+                unmap->host_addr = addr;
+
+        unmap->handle = handle;
+        unmap->dev_bus_addr = 0;
+}
+
 int arch_gnttab_map_shared(unsigned long *frames, unsigned long nr_gframes,
                            unsigned long max_nr_gframes,
                            struct grant_entry **__shared);
@@ -118,4 +155,9 @@ unsigned int gnttab_max_grant_frames(void);
 
 #define gnttab_map_vaddr(map) ((void *)(map.host_virt_addr))
 
+int gnttab_map_refs(struct gnttab_map_grant_ref *map_ops,
+                    struct page **pages, unsigned int count);
+int gnttab_unmap_refs(struct gnttab_unmap_grant_ref *unmap_ops,
+                      struct page **pages, unsigned int count);
+
 #endif /* __ASM_GNTTAB_H__ */