The annotated functios will be placed into .text.unlikely section. The
annotation also hints compiler to move the code out of the hot paths,
and may implicitly mark if-statement leading to that block as unlikely.
This is a heuristic, the impact on the generated code is not
significant.
Signed-off-by: David Sterba <dsterba@xxxxxxx>
---
fs/btrfs/ctree.h | 4 ++++
fs/btrfs/super.c | 3 +++
2 files changed, 7 insertions(+)
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index b0f9ba4b47c8..3a303451f010 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -4011,6 +4011,7 @@ void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
#ifdef CONFIG_BTRFS_ASSERT
+__cold
static inline void assfail(char *expr, char *file, int line)
{
pr_err("BTRFS: assertion failed: %s, file: %s, line: %d",
@@ -4026,10 +4027,12 @@ static inline void assfail(char *expr, char *file, int line)
#define btrfs_assert()
__printf(5, 6)
+__cold
void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
unsigned int line, int errno, const char *fmt, ...);
+__cold
void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
struct btrfs_root *root, const char *function,
unsigned int line, int errno);
@@ -4099,6 +4102,7 @@ do { \
} while (0)
__printf(5, 6)
+__cold
void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
unsigned int line, int errno, const char *fmt, ...);
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 3c6033768ad3..51a36bf80b2e 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -135,6 +135,7 @@ static void btrfs_handle_error(struct btrfs_fs_info *fs_info)
* __btrfs_std_error decodes expected errors from the caller and
* invokes the approciate error response.
*/
+__cold
void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
unsigned int line, int errno, const char *fmt, ...)
{
@@ -247,6 +248,7 @@ void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
* We'll complete the cleanup in btrfs_end_transaction and
* btrfs_commit_transaction.
*/
+__cold
void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
struct btrfs_root *root, const char *function,
unsigned int line, int errno)
@@ -273,6 +275,7 @@ void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
* __btrfs_panic decodes unexpected, fatal errors from the caller,
* issues an alert, and either panics or BUGs, depending on mount options.
*/
+__cold
void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
unsigned int line, int errno, const char *fmt, ...)
{
--
2.1.3
--
To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
