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>

diff --git a/arch/sparc/kernel/ldc.c b/arch/sparc/kernel/ldc.c
index e0ba898e30cffa2438ee8cb569edf796ca96dfbc..df39a0f0d27af2c250a3c7da9a2b50208d240e5f 100644 (file)
--- a/arch/sparc/kernel/ldc.c
+++ b/arch/sparc/kernel/ldc.c
@@ -14,6 +14,7 @@
 #include <linux/interrupt.h>
 #include <linux/list.h>
 #include <linux/init.h>
+#include <linux/bitmap.h>
 
 #include <asm/hypervisor.h>
 #include <asm/iommu.h>
@@ -1875,7 +1876,7 @@ EXPORT_SYMBOL(ldc_read);
 static long arena_alloc(struct ldc_iommu *iommu, unsigned long npages)
 {
        struct iommu_arena *arena = &iommu->arena;
-       unsigned long n, i, start, end, limit;
+       unsigned long n, start, end, limit;
        int pass;
 
        limit = arena->limit;
@@ -1883,7 +1884,7 @@ static long arena_alloc(struct ldc_iommu *iommu, unsigned long npages)
        pass = 0;
 
 again:
-       n = find_next_zero_bit(arena->map, limit, start);
+       n = bitmap_find_next_zero_area(arena->map, limit, start, npages, 0);
        end = n + npages;
        if (unlikely(end >= limit)) {
                if (likely(pass < 1)) {
@@ -1896,16 +1897,7 @@ again:
                        return -1;
                }
        }
-
-       for (i = n; i < end; i++) {
-               if (test_bit(i, arena->map)) {
-                       start = i + 1;
-                       goto again;
-               }
-       }
-
-       for (i = n; i < end; i++)
-               __set_bit(i, arena->map);
+       bitmap_set(arena->map, n, npages);
 
        arena->hint = end;
 

diff --git a/arch/sparc/mm/sun4c.c b/arch/sparc/mm/sun4c.c
index 2ffacd67c42403393013bd73cd191eddbdc3b22f..a89baf0d875af3ef7a557675b87a90398ee6fbd3 100644 (file)
--- 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) {