From: "Keshavamurthy, Anil S" <anil.s.keshavamurthy@intel.com>

Introduce the size param for clflush_cache_range().

Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
Cc: Andi Kleen <ak@suse.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Muli Ben-Yehuda <muli@il.ibm.com>
Cc: "Siddha, Suresh B" <suresh.b.siddha@intel.com>
Cc: Arjan van de Ven <arjan@infradead.org>
Cc: Ashok Raj <ashok.raj@intel.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Christoph Lameter <clameter@sgi.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 arch/x86_64/mm/pageattr.c       |    6 +++---
 include/asm-x86_64/cacheflush.h |    1 +
 2 files changed, 4 insertions(+), 3 deletions(-)

diff -puN arch/x86_64/mm/pageattr.c~intel-iommu-clflush_cache_range-now-takes-size-param arch/x86_64/mm/pageattr.c
--- a/arch/x86_64/mm/pageattr.c~intel-iommu-clflush_cache_range-now-takes-size-param
+++ a/arch/x86_64/mm/pageattr.c
@@ -75,10 +75,10 @@ struct flush_arg {
 	struct list_head l;
 };
 
-static void cache_flush_page(void *adr)
+void clflush_cache_range(void *adr, int size)
 {
 	int i;
-	for (i = 0; i < PAGE_SIZE; i += boot_cpu_data.x86_clflush_size)
+	for (i = 0; i < size; i += boot_cpu_data.x86_clflush_size)
 		clflush(adr+i);
 }
 
@@ -93,7 +93,7 @@ static void flush_kernel_map(void *arg)
 		asm volatile("wbinvd" ::: "memory");
 	else list_for_each_entry(pg, &a->l, lru) {
 		if (PageFlush(pg))
-			cache_flush_page(page_address(pg));
+			clflush_cache_range(page_address(pg), PAGE_SIZE);
 	}
 	__flush_tlb_all();
 }
diff -puN include/asm-x86_64/cacheflush.h~intel-iommu-clflush_cache_range-now-takes-size-param include/asm-x86_64/cacheflush.h
--- a/include/asm-x86_64/cacheflush.h~intel-iommu-clflush_cache_range-now-takes-size-param
+++ a/include/asm-x86_64/cacheflush.h
@@ -27,6 +27,7 @@
 void global_flush_tlb(void); 
 int change_page_attr(struct page *page, int numpages, pgprot_t prot);
 int change_page_attr_addr(unsigned long addr, int numpages, pgprot_t prot);
+void clflush_cache_range(void *addr, int size);
 
 #ifdef CONFIG_DEBUG_RODATA
 void mark_rodata_ro(void);
_