[XFS] Fix up sparse warnings.

These are mostly locking annotations, marking things static, casts where
needed and declaring stuff in header files.

SGI-PV: 971186
SGI-Modid: xfs-linux-melb:xfs-kern:30002a

Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>

19 files changed, 50 insertions, 37 deletions

diff --git a/fs/xfs/linux-2.6/xfs_globals.c b/fs/xfs/linux-2.6/xfs_globals.c
index 9febf9dc999d..ef90e64641e6 100644
--- a/fs/xfs/linux-2.6/xfs_globals.c
+++ b/fs/xfs/linux-2.6/xfs_globals.c
@@ -47,5 +47,6 @@ xfs_param_t xfs_params = {
 /*
  * Global system credential structure.
  */
-cred_t sys_cred_val, *sys_cred = &sys_cred_val;
+static cred_t sys_cred_val;
+cred_t *sys_cred = &sys_cred_val;
 
diff --git a/fs/xfs/linux-2.6/xfs_ioctl.c b/fs/xfs/linux-2.6/xfs_ioctl.c
index cb2c99126288..daa351a0a03d 100644
--- a/fs/xfs/linux-2.6/xfs_ioctl.c
+++ b/fs/xfs/linux-2.6/xfs_ioctl.c
@@ -512,7 +512,7 @@ xfs_attrmulti_attr_get(
         if (!kbuf)
                 return ENOMEM;
 
-        error = xfs_attr_get(XFS_I(inode), name, kbuf, len, flags, NULL);
+        error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags, NULL);
         if (error)
                 goto out_kfree;
 
diff --git a/fs/xfs/linux-2.6/xfs_ioctl32.c b/fs/xfs/linux-2.6/xfs_ioctl32.c
index 83463c27545c..a4b254eb43b2 100644
--- a/fs/xfs/linux-2.6/xfs_ioctl32.c
+++ b/fs/xfs/linux-2.6/xfs_ioctl32.c
@@ -44,6 +44,7 @@
 #include "xfs_error.h"
 #include "xfs_dfrag.h"
 #include "xfs_vnodeops.h"
+#include "xfs_ioctl32.h"
 
 #define  _NATIVE_IOC(cmd, type) \
           _IOC(_IOC_DIR(cmd), _IOC_TYPE(cmd), _IOC_NR(cmd), sizeof(type))
diff --git a/fs/xfs/xfs_attr.c b/fs/xfs/xfs_attr.c
index 93fa64dd1be6..e58f321fdae9 100644
--- a/fs/xfs/xfs_attr.c
+++ b/fs/xfs/xfs_attr.c
@@ -929,7 +929,7 @@ xfs_attr_shortform_addname(xfs_da_args_t *args)
  * This leaf block cannot have a "remote" value, we only call this routine
  * if bmap_one_block() says there is only one block (ie: no remote blks).
  */
-int
+STATIC int
 xfs_attr_leaf_addname(xfs_da_args_t *args)
 {
         xfs_inode_t *dp;
diff --git a/fs/xfs/xfs_bmap.c b/fs/xfs/xfs_bmap.c
index 97f0328b5ac2..b02452b11456 100644
--- a/fs/xfs/xfs_bmap.c
+++ b/fs/xfs/xfs_bmap.c
@@ -6393,7 +6393,7 @@ xfs_bmap_count_blocks(
  * Recursively walks each level of a btree
  * to count total fsblocks is use.
  */
-int                                     /* error */
+STATIC int                                     /* error */
 xfs_bmap_count_tree(
         xfs_mount_t     *mp,            /* file system mount point */
         xfs_trans_t     *tp,            /* transaction pointer */
@@ -6469,7 +6469,7 @@ xfs_bmap_count_tree(
 /*
  * Count leaf blocks given a range of extent records.
  */
-int
+STATIC int
 xfs_bmap_count_leaves(
         xfs_ifork_t             *ifp,
         xfs_extnum_t            idx,
@@ -6489,7 +6489,7 @@ xfs_bmap_count_leaves(
  * Count leaf blocks given a range of extent records originally
  * in btree format.
  */
-int
+STATIC int
 xfs_bmap_disk_count_leaves(
         xfs_extnum_t            idx,
         xfs_bmbt_block_t        *block,
diff --git a/fs/xfs/xfs_bmap.h b/fs/xfs/xfs_bmap.h
index 68267d75ff19..87224b7d7984 100644
--- a/fs/xfs/xfs_bmap.h
+++ b/fs/xfs/xfs_bmap.h
@@ -25,6 +25,8 @@ struct xfs_inode;
 struct xfs_mount;
 struct xfs_trans;
 
+extern kmem_zone_t      *xfs_bmap_free_item_zone;
+
 /*
  * DELTA: describe a change to the in-core extent list.
  *
diff --git a/fs/xfs/xfs_btree.h b/fs/xfs/xfs_btree.h
index 6e40a0a198ff..7440b78f9cec 100644
--- a/fs/xfs/xfs_btree.h
+++ b/fs/xfs/xfs_btree.h
@@ -24,6 +24,8 @@ struct xfs_inode;
 struct xfs_mount;
 struct xfs_trans;
 
+extern kmem_zone_t      *xfs_btree_cur_zone;
+
 /*
  * This nonsense is to make -wlint happy.
  */
diff --git a/fs/xfs/xfs_buf_item.h b/fs/xfs/xfs_buf_item.h
index d7e136143066..5a41c348bb1c 100644
--- a/fs/xfs/xfs_buf_item.h
+++ b/fs/xfs/xfs_buf_item.h
@@ -18,6 +18,8 @@
 #ifndef __XFS_BUF_ITEM_H__
 #define __XFS_BUF_ITEM_H__
 
+extern kmem_zone_t      *xfs_buf_item_zone;
+
 /*
  * This is the structure used to lay out a buf log item in the
  * log.  The data map describes which 128 byte chunks of the buffer
diff --git a/fs/xfs/xfs_da_btree.h b/fs/xfs/xfs_da_btree.h
index 44dabf02f2a3..7facf86f74f9 100644
--- a/fs/xfs/xfs_da_btree.h
+++ b/fs/xfs/xfs_da_btree.h
@@ -260,6 +260,7 @@ void xfs_da_binval(struct xfs_trans *tp, xfs_dabuf_t *dabuf);
 xfs_daddr_t xfs_da_blkno(xfs_dabuf_t *dabuf);
 
 extern struct kmem_zone *xfs_da_state_zone;
+extern struct kmem_zone *xfs_dabuf_zone;
 #endif  /* __KERNEL__ */
 
 #endif  /* __XFS_DA_BTREE_H__ */
diff --git a/fs/xfs/xfs_dir2.c b/fs/xfs/xfs_dir2.c
index 1e22133178d3..be7c4251fa61 100644
--- a/fs/xfs/xfs_dir2.c
+++ b/fs/xfs/xfs_dir2.c
@@ -42,6 +42,7 @@
 #include "xfs_dir2_node.h"
 #include "xfs_dir2_trace.h"
 #include "xfs_error.h"
+#include "xfs_vnodeops.h"
 
 
 void
diff --git a/fs/xfs/xfs_filestream.c b/fs/xfs/xfs_filestream.c
index 36d8f6aa11af..eb03eab5ca52 100644
--- a/fs/xfs/xfs_filestream.c
+++ b/fs/xfs/xfs_filestream.c
@@ -348,7 +348,7 @@ _xfs_filestream_update_ag(
 }
 
 /* xfs_fstrm_free_func(): callback for freeing cached stream items. */
-void
+STATIC void
 xfs_fstrm_free_func(
         unsigned long   ino,
         void            *data)
diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c
index 6e3d8084d8b3..301a6b8c2034 100644
--- a/fs/xfs/xfs_log.c
+++ b/fs/xfs/xfs_log.c
@@ -907,7 +907,7 @@ xlog_assign_tail_lsn(xfs_mount_t *mp)
  * the tail.  The details of this case are described below, but the end
  * result is that we return the size of the log as the amount of space left.
  */
-int
+STATIC int
 xlog_space_left(xlog_t *log, int cycle, int bytes)
 {
         int free_bytes;
@@ -1289,7 +1289,7 @@ xlog_commit_record(xfs_mount_t  *mp,
  * pushes on an lsn which is further along in the log once we reach the high
  * water mark.  In this manner, we would be creating a low water mark.
  */
-void
+STATIC void
 xlog_grant_push_ail(xfs_mount_t *mp,
                     int         need_bytes)
 {
@@ -1372,7 +1372,7 @@ xlog_grant_push_ail(xfs_mount_t	*mp,
  * is added immediately before calling bwrite().
  */
 
-int
+STATIC int
 xlog_sync(xlog_t                *log,
           xlog_in_core_t        *iclog)
 {
@@ -1516,7 +1516,7 @@ xlog_sync(xlog_t		*log,
 /*
  * Deallocate a log structure
  */
-void
+STATIC void
 xlog_dealloc_log(xlog_t *log)
 {
         xlog_in_core_t  *iclog, *next_iclog;
@@ -1738,7 +1738,7 @@ xlog_print_tic_res(xfs_mount_t *mp, xlog_ticket_t *ticket)
  *      we don't update ic_offset until the end when we know exactly how many
  *      bytes have been written out.
  */
-int
+STATIC int
 xlog_write(xfs_mount_t *        mp,
            xfs_log_iovec_t      reg[],
            int                  nentries,
@@ -2280,7 +2280,7 @@ xlog_state_do_callback(
  * global state machine log lock.  Assume that the calls to cvsema won't
  * take a long time.  At least we know it won't sleep.
  */
-void
+STATIC void
 xlog_state_done_syncing(
         xlog_in_core_t  *iclog,
         int             aborted)
@@ -2340,7 +2340,7 @@ xlog_state_done_syncing(
  *              needs to be incremented, depending on the amount of data which
  *              is copied.
  */
-int
+STATIC int
 xlog_state_get_iclog_space(xlog_t         *log,
                            int            len,
                            xlog_in_core_t **iclogp,
@@ -2776,7 +2776,7 @@ xlog_ungrant_log_space(xlog_t	     *log,
 /*
  * Atomically put back used ticket.
  */
-void
+STATIC void
 xlog_state_put_ticket(xlog_t        *log,
                       xlog_ticket_t *tic)
 {
@@ -2794,7 +2794,7 @@ xlog_state_put_ticket(xlog_t	    *log,
  *
  *
  */
-int
+STATIC int
 xlog_state_release_iclog(xlog_t         *log,
                          xlog_in_core_t *iclog)
 {
@@ -3024,7 +3024,7 @@ no_sleep:
  * If filesystem activity goes to zero, the iclog will get flushed only by
  * bdflush().
  */
-int
+STATIC int
 xlog_state_sync(xlog_t    *log,
                 xfs_lsn_t lsn,
                 uint      flags,
@@ -3129,7 +3129,7 @@ try_again:
  * Called when we want to mark the current iclog as being ready to sync to
  * disk.
  */
-void
+STATIC void
 xlog_state_want_sync(xlog_t *log, xlog_in_core_t *iclog)
 {
         spin_lock(&log->l_icloglock);
@@ -3241,7 +3241,7 @@ xlog_ticket_put(xlog_t		*log,
 /*
  * Grab ticket off freelist or allocation some more
  */
-xlog_ticket_t *
+STATIC xlog_ticket_t *
 xlog_ticket_get(xlog_t          *log,
                 int             unit_bytes,
                 int             cnt,
diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c
index 35e098d4d749..3b804b93b282 100644
--- a/fs/xfs/xfs_log_recover.c
+++ b/fs/xfs/xfs_log_recover.c
@@ -293,7 +293,7 @@ xlog_recover_iodone(
  * Note that the algorithm can not be perfect because the disk will not
  * necessarily be perfect.
  */
-int
+STATIC int
 xlog_find_cycle_start(
         xlog_t          *log,
         xfs_buf_t       *bp,
@@ -986,7 +986,7 @@ exit:
  *      -1 => use *blk_no as the first block of the log
  *      >0 => error has occurred
  */
-int
+STATIC int
 xlog_find_zeroed(
         xlog_t          *log,
         xfs_daddr_t     *blk_no)
diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index 2806d43d7d23..766c01670b2c 100644
--- a/fs/xfs/xfs_mount.c
+++ b/fs/xfs/xfs_mount.c
@@ -2343,7 +2343,7 @@ out:
                 spin_unlock(&mp->m_sb_lock);
 }
 
-int
+STATIC int
 xfs_icsb_modify_counters(
         xfs_mount_t     *mp,
         xfs_sb_field_t  field,
diff --git a/fs/xfs/xfs_mru_cache.c b/fs/xfs/xfs_mru_cache.c
index 012209eda35d..a0b2c0a2589a 100644
--- a/fs/xfs/xfs_mru_cache.c
+++ b/fs/xfs/xfs_mru_cache.c
@@ -225,10 +225,14 @@ _xfs_mru_cache_list_insert(
  * list need to be deleted.  For each element this involves removing it from the
  * data store, removing it from the reap list, calling the client's free
  * function and deleting the element from the element zone.
+ *
+ * We get called holding the mru->lock, which we drop and then reacquire.
+ * Sparse need special help with this to tell it we know what we are doing.
  */
 STATIC void
 _xfs_mru_cache_clear_reap_list(
-        xfs_mru_cache_t         *mru)
+        xfs_mru_cache_t         *mru) __releases(mru->lock) __acquires(mru->lock)
+
 {
         xfs_mru_cache_elem_t    *elem, *next;
         struct list_head        tmp;
@@ -528,6 +532,10 @@ xfs_mru_cache_delete(
  *
  * If the element isn't found, this function returns NULL and the spinlock is
  * released.  xfs_mru_cache_done() should NOT be called when this occurs.
+ *
+ * Because sparse isn't smart enough to know about conditional lock return
+ * status, we need to help it get it right by annotating the path that does
+ * not release the lock.
  */
 void *
 xfs_mru_cache_lookup(
@@ -545,8 +553,8 @@ xfs_mru_cache_lookup(
         if (elem) {
                 list_del(&elem->list_node);
                 _xfs_mru_cache_list_insert(mru, elem);
-        }
-        else
+                __release(mru_lock); /* help sparse not be stupid */
+        } else
                 spin_unlock(&mru->lock);
 
         return elem ? elem->value : NULL;
@@ -575,6 +583,8 @@ xfs_mru_cache_peek(
         elem = radix_tree_lookup(&mru->store, key);
         if (!elem)
                 spin_unlock(&mru->lock);
+        else
+                __release(mru_lock); /* help sparse not be stupid */
 
         return elem ? elem->value : NULL;
 }
@@ -586,7 +596,7 @@ xfs_mru_cache_peek(
  */
 void
 xfs_mru_cache_done(
-        xfs_mru_cache_t *mru)
+        xfs_mru_cache_t *mru) __releases(mru->lock)
 {
         spin_unlock(&mru->lock);
 }
diff --git a/fs/xfs/xfs_rename.c b/fs/xfs/xfs_rename.c
index 17e7496bdd5f..7eb157a59f9e 100644
--- a/fs/xfs/xfs_rename.c
+++ b/fs/xfs/xfs_rename.c
@@ -39,6 +39,7 @@
 #include "xfs_refcache.h"
 #include "xfs_utils.h"
 #include "xfs_trans_space.h"
+#include "xfs_vnodeops.h"
 
 
 /*
diff --git a/fs/xfs/xfs_trans.h b/fs/xfs/xfs_trans.h
index 0e26e729023e..bea6e2b95a90 100644
--- a/fs/xfs/xfs_trans.h
+++ b/fs/xfs/xfs_trans.h
@@ -1001,6 +1001,8 @@ xfs_log_busy_slot_t *xfs_trans_add_busy(xfs_trans_t *tp,
                                         xfs_agnumber_t ag,
                                         xfs_extlen_t idx);
 
+extern kmem_zone_t      *xfs_trans_zone;
+
 #endif  /* __KERNEL__ */
 
 #endif  /* __XFS_TRANS_H__ */
diff --git a/fs/xfs/xfs_trans_item.c b/fs/xfs/xfs_trans_item.c
index 2912aac07c7b..66a09f0d894b 100644
--- a/fs/xfs/xfs_trans_item.c
+++ b/fs/xfs/xfs_trans_item.c
@@ -21,6 +21,7 @@
 #include "xfs_log.h"
 #include "xfs_inum.h"
 #include "xfs_trans.h"
+#include "xfs_trans_priv.h"
 
 STATIC int      xfs_trans_unlock_chunk(xfs_log_item_chunk_t *,
                                         int, int, xfs_lsn_t);
diff --git a/fs/xfs/xfs_vfsops.c b/fs/xfs/xfs_vfsops.c
index fd4a0dfc599f..871a1747706b 100644
--- a/fs/xfs/xfs_vfsops.c
+++ b/fs/xfs/xfs_vfsops.c
@@ -61,11 +61,6 @@
 int
 xfs_init(void)
 {
-        extern kmem_zone_t      *xfs_bmap_free_item_zone;
-        extern kmem_zone_t      *xfs_btree_cur_zone;
-        extern kmem_zone_t      *xfs_trans_zone;
-        extern kmem_zone_t      *xfs_buf_item_zone;
-        extern kmem_zone_t      *xfs_dabuf_zone;
 #ifdef XFS_DABUF_DEBUG
         extern spinlock_t        xfs_dabuf_global_lock;
         spin_lock_init(&xfs_dabuf_global_lock);
@@ -155,15 +150,9 @@ xfs_init(void)
 void
 xfs_cleanup(void)
 {
-        extern kmem_zone_t      *xfs_bmap_free_item_zone;
-        extern kmem_zone_t      *xfs_btree_cur_zone;
         extern kmem_zone_t      *xfs_inode_zone;
-        extern kmem_zone_t      *xfs_trans_zone;
-        extern kmem_zone_t      *xfs_da_state_zone;
-        extern kmem_zone_t      *xfs_dabuf_zone;
         extern kmem_zone_t      *xfs_efd_zone;
         extern kmem_zone_t      *xfs_efi_zone;
-        extern kmem_zone_t      *xfs_buf_item_zone;
         extern kmem_zone_t      *xfs_icluster_zone;
 
         xfs_cleanup_procfs();