X-Git-Url: http://git.cascardo.eti.br/?a=blobdiff_plain;f=arch%2Fsparc%2Fmm%2Ftsb.c;h=e20fbbafb0b04af0fa85b21188cd6c851c132e6e;hb=0c183d92b20b5c84ca655b45ef57b3318b83eb9e;hp=f2b77112e9d8bb50f4f05346e955fb4c5f6746a9;hpb=b2edcdae3d9a29b25f6c161a8711caa74ce49991;p=cascardo%2Flinux.git

diff --git a/arch/sparc/mm/tsb.c b/arch/sparc/mm/tsb.c
index f2b77112e9d8..e20fbbafb0b0 100644
--- a/arch/sparc/mm/tsb.c
+++ b/arch/sparc/mm/tsb.c
@@ -27,6 +27,20 @@ static inline int tag_compare(unsigned long tag, unsigned long vaddr)
 	return (tag == (vaddr >> 22));
 }
 
+static void flush_tsb_kernel_range_scan(unsigned long start, unsigned long end)
+{
+	unsigned long idx;
+
+	for (idx = 0; idx < KERNEL_TSB_NENTRIES; idx++) {
+		struct tsb *ent = &swapper_tsb[idx];
+		unsigned long match = idx << 13;
+
+		match |= (ent->tag << 22);
+		if (match >= start && match < end)
+			ent->tag = (1UL << TSB_TAG_INVALID_BIT);
+	}
+}
+
 /* TSB flushes need only occur on the processor initiating the address
  * space modification, not on each cpu the address space has run on.
  * Only the TLB flush needs that treatment.
@@ -36,6 +50,9 @@ void flush_tsb_kernel_range(unsigned long start, unsigned long end)
 {
 	unsigned long v;
 
+	if ((end - start) >> PAGE_SHIFT >= 2 * KERNEL_TSB_NENTRIES)
+		return flush_tsb_kernel_range_scan(start, end);
+
 	for (v = start; v < end; v += PAGE_SIZE) {
 		unsigned long hash = tsb_hash(v, PAGE_SHIFT,
 					      KERNEL_TSB_NENTRIES);