[XFS] streamline init/exit path

Currently the xfs module init/exit code is a mess. It's farmed out over a
lot of function with very little error checking. This patch makes sure we
propagate all initialization failures properly and clean up after them.
Various runtime initializations are replaced with compile-time
initializations where possible to make this easier. The exit path is
similarly consolidated.

There's now split out function to create/destroy the kmem zones and
alloc/free the trace buffers. I've also changed the ktrace allocations to
KM_MAYFAIL and handled errors resulting from that.

And yes, we really should replace the XFS_*_TRACE ifdefs with a single
XFS_TRACE..

SGI-PV: 976035

SGI-Modid: xfs-linux-melb:xfs-kern:31354a

Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Niv Sardi <xaiki@sgi.com>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>

2 files changed, 1 insertions, 8 deletions

diff --git a/fs/xfs/support/uuid.c b/fs/xfs/support/uuid.c
index 493a6ecf8590..5830c040ea7e 100644
--- a/fs/xfs/support/uuid.c
+++ b/fs/xfs/support/uuid.c
@@ -17,7 +17,7 @@
  */
 #include <xfs.h>
 
-static mutex_t  uuid_monitor;
+static DEFINE_MUTEX(uuid_monitor);
 static int      uuid_table_size;
 static uuid_t   *uuid_table;
 
@@ -132,9 +132,3 @@ uuid_table_remove(uuid_t *uuid)
         ASSERT(i < uuid_table_size);
         mutex_unlock(&uuid_monitor);
 }
-
-void __init
-uuid_init(void)
-{
-        mutex_init(&uuid_monitor);
-}
diff --git a/fs/xfs/support/uuid.h b/fs/xfs/support/uuid.h
index b6f5922199ba..cff5b607d445 100644
--- a/fs/xfs/support/uuid.h
+++ b/fs/xfs/support/uuid.h
@@ -22,7 +22,6 @@ typedef struct {
         unsigned char   __u_bits[16];
 } uuid_t;
 
-extern void uuid_init(void);
 extern void uuid_create_nil(uuid_t *uuid);
 extern int uuid_is_nil(uuid_t *uuid);
 extern int uuid_equal(uuid_t *uuid1, uuid_t *uuid2);