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| author | Mike Snitzer <snitzer@kernel.org> | 2022-03-26 21:14:00 +0300 |
|---|---|---|
| committer | Mike Snitzer <snitzer@kernel.org> | 2022-05-06 00:31:34 +0300 |
| commit | 442761fd2b297d65d1cb5786249e1e07a19e9122 (patch) | |
| tree | 5f2b1b8f1c25cd74c1e2c0af3ce2e6fed3941c5b /drivers/md/dm-core.h | |
| parent | 563a225c9fd207326c2a2af9d59b4097cb31ce70 (diff) | |
| download | linux-442761fd2b297d65d1cb5786249e1e07a19e9122.tar.xz | |
dm: conditionally enable branching for less used features
Use jump_labels to further reduce cost of unlikely branches for zoned
block devices, dm-stats and swap_bios throttling.
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Diffstat (limited to 'drivers/md/dm-core.h')
| -rw-r--r-- | drivers/md/dm-core.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/md/dm-core.h b/drivers/md/dm-core.h index 41d6511dc7cf..8ba99eaa0872 100644 --- a/drivers/md/dm-core.h +++ b/drivers/md/dm-core.h @@ -13,6 +13,7 @@ #include <linux/ktime.h> #include <linux/blk-mq.h> #include <linux/blk-crypto-profile.h> +#include <linux/jump_label.h> #include <trace/events/block.h> @@ -154,6 +155,10 @@ static inline struct dm_stats *dm_get_stats(struct mapped_device *md) return &md->stats; } +DECLARE_STATIC_KEY_FALSE(stats_enabled); +DECLARE_STATIC_KEY_FALSE(swap_bios_enabled); +DECLARE_STATIC_KEY_FALSE(zoned_enabled); + static inline bool dm_emulate_zone_append(struct mapped_device *md) { if (blk_queue_is_zoned(md->queue)) |