bcache: A block layer cache

Does writethrough and writeback caching, handles unclean shutdown, and
has a bunch of other nifty features motivated by real world usage.

See the wiki at http://bcache.evilpiepirate.org for more.

Signed-off-by: Kent Overstreet <koverstreet@google.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/kernel/fork.c b/kernel/fork.c
index 1766d324d5e3..7b54fb62332c 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1303,6 +1303,10 @@ static struct task_struct *copy_process(unsigned long clone_flags,
         p->memcg_batch.do_batch = 0;
         p->memcg_batch.memcg = NULL;
 #endif
+#ifdef CONFIG_BCACHE
+        p->sequential_io        = 0;
+        p->sequential_io_avg    = 0;
+#endif
 
         /* Perform scheduler related setup. Assign this task to a CPU. */
         sched_fork(p);