btrfs: trace: Remove unnecessary fs_info parameter for btrfs__reserve_extent event...

fs_info can be extracted from btrfs_block_group_cache, and all
btrfs_block_group_cache is created by btrfs_create_block_group_cache()
with fs_info initialized, no need to worry about NULL pointer
dereference.

Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index fdd6ac9..295f829 100644 (file)
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -7651,7 +7651,7 @@ have_block_group:
                        if (offset) {
                                /* we have a block, we're done */
                                spin_unlock(&last_ptr->refill_lock);
-                               trace_btrfs_reserve_extent_cluster(fs_info,
+                               trace_btrfs_reserve_extent_cluster(
                                                used_block_group,
                                                search_start, num_bytes);
                                if (used_block_group != block_group) {
@@ -7724,7 +7724,7 @@ refill_cluster:
                                if (offset) {
                                        /* we found one, proceed */
                                        spin_unlock(&last_ptr->refill_lock);
-                                       trace_btrfs_reserve_extent_cluster(fs_info,
+                                       trace_btrfs_reserve_extent_cluster(
                                                block_group, search_start,
                                                num_bytes);
                                        goto checks;
@@ -7824,8 +7824,7 @@ checks:
                ins->objectid = search_start;
                ins->offset = num_bytes;
 
-               trace_btrfs_reserve_extent(fs_info, block_group,
-                                          search_start, num_bytes);
+               trace_btrfs_reserve_extent(block_group, search_start, num_bytes);
                btrfs_release_block_group(block_group, delalloc);
                break;
 loop:

diff --git a/include/trace/events/btrfs.h b/include/trace/events/btrfs.h
index d78d8ab..5af2479 100644 (file)
--- a/include/trace/events/btrfs.h
+++ b/include/trace/events/btrfs.h
@@ -1146,11 +1146,10 @@ TRACE_EVENT(find_free_extent,
 
 DECLARE_EVENT_CLASS(btrfs__reserve_extent,
 
-       TP_PROTO(const struct btrfs_fs_info *fs_info,
-                const struct btrfs_block_group_cache *block_group, u64 start,
+       TP_PROTO(const struct btrfs_block_group_cache *block_group, u64 start,
                 u64 len),
 
-       TP_ARGS(fs_info, block_group, start, len),
+       TP_ARGS(block_group, start, len),
 
        TP_STRUCT__entry_btrfs(
                __field(        u64,    bg_objectid             )
@@ -1159,7 +1158,7 @@ DECLARE_EVENT_CLASS(btrfs__reserve_extent,
                __field(        u64,    len                     )
        ),
 
-       TP_fast_assign_btrfs(fs_info,
+       TP_fast_assign_btrfs(block_group->fs_info,
                __entry->bg_objectid    = block_group->key.objectid;
                __entry->flags          = block_group->flags;
                __entry->start          = start;
@@ -1177,20 +1176,18 @@ DECLARE_EVENT_CLASS(btrfs__reserve_extent,
 
 DEFINE_EVENT(btrfs__reserve_extent, btrfs_reserve_extent,
 
-       TP_PROTO(const struct btrfs_fs_info *fs_info,
-                const struct btrfs_block_group_cache *block_group, u64 start,
+       TP_PROTO(const struct btrfs_block_group_cache *block_group, u64 start,
                 u64 len),
 
-       TP_ARGS(fs_info, block_group, start, len)
+       TP_ARGS(block_group, start, len)
 );
 
 DEFINE_EVENT(btrfs__reserve_extent, btrfs_reserve_extent_cluster,
 
-       TP_PROTO(const struct btrfs_fs_info *fs_info,
-                const struct btrfs_block_group_cache *block_group, u64 start,
+       TP_PROTO(const struct btrfs_block_group_cache *block_group, u64 start,
                 u64 len),
 
-       TP_ARGS(fs_info, block_group, start, len)
+       TP_ARGS(block_group, start, len)
 );
 
 TRACE_EVENT(btrfs_find_cluster,
@@ -1807,6 +1804,7 @@ TRACE_EVENT(btrfs_inode_mod_outstanding_extents,
                        show_root_type(__entry->root_objectid),
                        __entry->ino, __entry->mod)
 );
+
 #endif /* _TRACE_BTRFS_H */
 
 /* This part must be outside protection */