sparc: use bitmap_find_next_zero_area

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Acked-by: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 5 insertions, 12 deletions

diff --git a/arch/sparc/mm/sun4c.c b/arch/sparc/mm/sun4c.c
index 2ffacd67c424..a89baf0d875a 100644
--- a/arch/sparc/mm/sun4c.c
+++ b/arch/sparc/mm/sun4c.c
@@ -17,6 +17,7 @@
 #include <linux/fs.h>
 #include <linux/seq_file.h>
 #include <linux/scatterlist.h>
+#include <linux/bitmap.h>
 
 #include <asm/sections.h>
 #include <asm/page.h>
@@ -1021,20 +1022,12 @@ static char *sun4c_lockarea(char *vaddr, unsigned long size)
         npages = (((unsigned long)vaddr & ~PAGE_MASK) +
                   size + (PAGE_SIZE-1)) >> PAGE_SHIFT;
 
-        scan = 0;
         local_irq_save(flags);
-        for (;;) {
-                scan = find_next_zero_bit(sun4c_iobuffer_map,
-                                          iobuffer_map_size, scan);
-                if ((base = scan) + npages > iobuffer_map_size) goto abend;
-                for (;;) {
-                        if (scan >= base + npages) goto found;
-                        if (test_bit(scan, sun4c_iobuffer_map)) break;
-                        scan++;
-                }
-        }
+        base = bitmap_find_next_zero_area(sun4c_iobuffer_map, iobuffer_map_size,
+                                                0, npages, 0);
+        if (base >= iobuffer_map_size)
+                goto abend;
 
-found:
         high = ((base + npages) << PAGE_SHIFT) + sun4c_iobuffer_start;
         high = SUN4C_REAL_PGDIR_ALIGN(high);
         while (high > sun4c_iobuffer_high) {