ia64: use bitmap_find_next_zero_area

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 5 insertions, 14 deletions

diff --git a/arch/ia64/sn/pci/tioca_provider.c b/arch/ia64/sn/pci/tioca_provider.c
index 35b2a27d2e77..efb454534e52 100644
--- a/arch/ia64/sn/pci/tioca_provider.c
+++ b/arch/ia64/sn/pci/tioca_provider.c
@@ -9,6 +9,7 @@
 #include <linux/types.h>
 #include <linux/interrupt.h>
 #include <linux/pci.h>
+#include <linux/bitmap.h>
 #include <asm/sn/sn_sal.h>
 #include <asm/sn/addrs.h>
 #include <asm/sn/io.h>
@@ -369,7 +370,7 @@ tioca_dma_d48(struct pci_dev *pdev, u64 paddr)
 static dma_addr_t
 tioca_dma_mapped(struct pci_dev *pdev, unsigned long paddr, size_t req_size)
 {
-        int i, ps, ps_shift, entry, entries, mapsize, last_entry;
+        int ps, ps_shift, entry, entries, mapsize;
         u64 xio_addr, end_xio_addr;
         struct tioca_common *tioca_common;
         struct tioca_kernel *tioca_kern;
@@ -410,23 +411,13 @@ tioca_dma_mapped(struct pci_dev *pdev, unsigned long paddr, size_t req_size)
         map = tioca_kern->ca_pcigart_pagemap;
         mapsize = tioca_kern->ca_pcigart_entries;
 
-        entry = find_first_zero_bit(map, mapsize);
-        while (entry < mapsize) {
-                last_entry = find_next_bit(map, mapsize, entry);
-
-                if (last_entry - entry >= entries)
-                        break;
-
-                entry = find_next_zero_bit(map, mapsize, last_entry);
-        }
-
-        if (entry > mapsize) {
+        entry = bitmap_find_next_zero_area(map, mapsize, 0, entries, 0);
+        if (entry >= mapsize) {
                 kfree(ca_dmamap);
                 goto map_return;
         }
 
-        for (i = 0; i < entries; i++)
-                set_bit(entry + i, map);
+        bitmap_set(map, entry, entries);
 
         bus_addr = tioca_kern->ca_pciap_base + (entry * ps);