lib: percpu_counter_add

[deliverable/linux.git] / fs / ext2 / balloc.c

diff --git a/fs/ext2/balloc.c b/fs/ext2/balloc.c
index bb6908066494e5dd158894b15232700f062fc8c4..53be251585603067c515f14bef2109b4ca34b64a 100644 (file)
--- a/fs/ext2/balloc.c
+++ b/fs/ext2/balloc.c
@@ -11,11 +11,11 @@
  *        David S. Miller (davem@caip.rutgers.edu), 1995
  */
 
-#include <linux/config.h>
 #include "ext2.h"
 #include <linux/quotaops.h>
 #include <linux/sched.h>
 #include <linux/buffer_head.h>
+#include <linux/capability.h>
 
 /*
  * balloc.c contains the blocks allocation and deallocation routines
@@ -29,7 +29,7 @@
  * The file system contains group descriptors which are located after the
  * super block.  Each descriptor contains the number of the bitmap block and
  * the free blocks count in the block.  The descriptors are loaded in memory
- * when a file system is mounted (see ext2_read_super).
+ * when a file system is mounted (see ext2_fill_super).
  */
 
 
@@ -124,7 +124,7 @@ static int reserve_blocks(struct super_block *sb, int count)
                        return 0;
        }
 
-       percpu_counter_mod(&sbi->s_freeblocks_counter, -count);
+       percpu_counter_add(&sbi->s_freeblocks_counter, -count);
        sb->s_dirt = 1;
        return count;
 }
@@ -134,7 +134,7 @@ static void release_blocks(struct super_block *sb, int count)
        if (count) {
                struct ext2_sb_info *sbi = EXT2_SB(sb);
 
-               percpu_counter_mod(&sbi->s_freeblocks_counter, count);
+               percpu_counter_add(&sbi->s_freeblocks_counter, count);
                sb->s_dirt = 1;
        }
 }
@@ -520,6 +520,25 @@ io_error:
        goto out_release;
 }
 
+#ifdef EXT2FS_DEBUG
+
+static int nibblemap[] = {4, 3, 3, 2, 3, 2, 2, 1, 3, 2, 2, 1, 2, 1, 1, 0};
+
+unsigned long ext2_count_free (struct buffer_head * map, unsigned int numchars)
+{
+       unsigned int i;
+       unsigned long sum = 0;
+
+       if (!map)
+               return (0);
+       for (i = 0; i < numchars; i++)
+               sum += nibblemap[map->b_data[i] & 0xf] +
+                       nibblemap[(map->b_data[i] >> 4) & 0xf];
+       return (sum);
+}
+
+#endif  /*  EXT2FS_DEBUG  */
+
 unsigned long ext2_count_free_blocks (struct super_block * sb)
 {
        struct ext2_group_desc * desc;
@@ -529,7 +548,6 @@ unsigned long ext2_count_free_blocks (struct super_block * sb)
        unsigned long bitmap_count, x;
        struct ext2_super_block *es;
 
-       lock_super (sb);
        es = EXT2_SB(sb)->s_es;
        desc_count = 0;
        bitmap_count = 0;
@@ -553,7 +571,6 @@ unsigned long ext2_count_free_blocks (struct super_block * sb)
        printk("ext2_count_free_blocks: stored = %lu, computed = %lu, %lu\n",
                (long)le32_to_cpu(es->s_free_blocks_count),
                desc_count, bitmap_count);
-       unlock_super (sb);
        return bitmap_count;
 #else
         for (i = 0; i < EXT2_SB(sb)->s_groups_count; i++) {