staging: lustre: obd: change brw_page->count to unsigned

Pages count is unsigned. So, change the type accordant usage.
Signed-off-by: Dmitry Eremin <dmitry.eremin@intel.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-5577
Reviewed-on: http://review.whamcloud.com/12378Reviewed-by: John L. Hammond <john.hammond@intel.com>
Reviewed-by: James Simmons <uja.ornl@gmail.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/lustre/lustre/include/obd.h

@@ -176,7 +176,7 @@ struct obd_type {
 struct brw_page {
 	u64 off;
 	struct page *pg;
-	int count;
+	unsigned int count;
 	u32 flag;
 };
 

drivers/staging/lustre/lustre/osc/osc_cache.c

@@ -1099,7 +1099,7 @@ static int osc_extent_make_ready(const struct lu_env *env,
 	struct osc_async_page *oap;
 	struct osc_async_page *last = NULL;
 	struct osc_object *obj = ext->oe_obj;
-	int page_count = 0;
+	unsigned int page_count = 0;
 	int rc;
 
 	/* we're going to grab page lock, so object lock must not be taken. */
@@ -1140,9 +1140,11 @@ static int osc_extent_make_ready(const struct lu_env *env,
 	 * the size of file.
 	 */
 	if (!(last->oap_async_flags & ASYNC_COUNT_STABLE)) {
-		last->oap_count = osc_refresh_count(env, last, OBD_BRW_WRITE);
-		LASSERT(last->oap_count > 0);
-		LASSERT(last->oap_page_off + last->oap_count <= PAGE_SIZE);
+		int last_oap_count = osc_refresh_count(env, last, OBD_BRW_WRITE);
+
+		LASSERT(last_oap_count > 0);
+		LASSERT(last->oap_page_off + last_oap_count <= PAGE_SIZE);
+		last->oap_count = last_oap_count;
 		spin_lock(&last->oap_lock);
 		last->oap_async_flags |= ASYNC_COUNT_STABLE;
 		spin_unlock(&last->oap_lock);

drivers/staging/lustre/lustre/osc/osc_cl_internal.h

@@ -64,7 +64,7 @@ struct osc_io {
 	/** true if this io is lockless. */
 	unsigned int		oi_lockless;
 	/** how many LRU pages are reserved for this IO */
-	int oi_lru_reserved;
+	unsigned long		oi_lru_reserved;
 
 	/** active extents, we know how many bytes is going to be written,
 	 * so having an active extent will prevent it from being fragmented