kill-the-bkl/reiserfs: drop the fs race watchdog from _get_block_create_0()

We had a watchdog in _get_block_create_0() that jumped to a fixup retry
path in case the bkl got relaxed while calling kmap().
This is not necessary anymore since we now have a reiserfs lock that is
not implicitly relaxed while sleeping.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jeff Mahoney <jeffm@suse.com>
Cc: Chris Mason <chris.mason@oracle.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Alexander Beregalov <a.beregalov@gmail.com>
Cc: Laurent Riffard <laurent.riffard@free.fr>
Cc: Thomas Gleixner <tglx@linutronix.de>

diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c
index 965c8ea..0d493a3 100644 (file)
--- a/fs/reiserfs/inode.c
+++ b/fs/reiserfs/inode.c
@@ -251,7 +251,6 @@ static int _get_block_create_0(struct inode *inode, sector_t block,
        struct cpu_key key;
        struct buffer_head *bh;
        struct item_head *ih, tmp_ih;
-       int fs_gen;
        b_blocknr_t blocknr;
        char *p = NULL;
        int chars;
@@ -265,7 +264,6 @@ static int _get_block_create_0(struct inode *inode, sector_t block,
                     (loff_t) block * inode->i_sb->s_blocksize + 1, TYPE_ANY,
                     3);
 
-      research:
        result = search_for_position_by_key(inode->i_sb, &key, &path);
        if (result != POSITION_FOUND) {
                pathrelse(&path);
@@ -340,7 +338,6 @@ static int _get_block_create_0(struct inode *inode, sector_t block,
        }
        // read file tail into part of page
        offset = (cpu_key_k_offset(&key) - 1) & (PAGE_CACHE_SIZE - 1);
-       fs_gen = get_generation(inode->i_sb);
        copy_item_head(&tmp_ih, ih);
 
        /* we only want to kmap if we are reading the tail into the page.
@@ -348,13 +345,9 @@ static int _get_block_create_0(struct inode *inode, sector_t block,
         ** sure we need to.  But, this means the item might move if
         ** kmap schedules
         */
-       if (!p) {
+       if (!p)
                p = (char *)kmap(bh_result->b_page);
-               if (fs_changed(fs_gen, inode->i_sb)
-                   && item_moved(&tmp_ih, &path)) {
-                       goto research;
-               }
-       }
+
        p += offset;
        memset(p, 0, inode->i_sb->s_blocksize);
        do {