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btrfs: add more __cold annotations

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The __cold functions are placed to a special section, as they're
expected to be called rarely. This could help i-cache prefetches or help
compiler to decide which branches are more/less likely to be taken
without any other annotations needed.

Though we can't add more __exit annotations, it's still possible to add
__cold (that's also added with __exit). That way the following function
categories are tagged:

- printf wrappers, error messages
- exit helpers

Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba
2018-02-19 17:24:18 +01:00
parent ffc5a3794f
commit e67c718b5b
23 changed files with 29 additions and 24 deletions
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2
fs/btrfs/extent_map.h
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@@ -86,7 +86,7 @@ void replace_extent_mapping(struct extent_map_tree *tree,
struct extent_map *alloc_extent_map(void);
void free_extent_map(struct extent_map *em);
int __init extent_map_init(void);
void extent_map_exit(void);
void __cold extent_map_exit(void);
int unpin_extent_cache(struct extent_map_tree *tree, u64 start, u64 len, u64 gen);
void clear_em_logging(struct extent_map_tree *tree, struct extent_map *em);
struct extent_map *search_extent_mapping(struct extent_map_tree *tree,