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| author | Javier González <javier@javigon.com> | 2018-10-09 13:12:09 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-10-09 16:25:08 +0200 |
| commit | 40b8657dcc0bbd4a293cac1acd4b0b01c0359416 (patch) | |
| tree | 132bc7832c197a44c16c38a59441803027fad974 /drivers/lightnvm/pblk.h | |
| parent | lightnvm: pblk: remove unused function (diff) | |
| download | linux-40b8657dcc0bbd4a293cac1acd4b0b01c0359416.tar.xz linux-40b8657dcc0bbd4a293cac1acd4b0b01c0359416.zip | |
lightnvm: pblk: encapsulate rb pointer operations
pblk's read/write buffer is always a power-of-2, thus wrapping up the
buffer can be done with a bit mask. Since this is an implementation
detail internal to the write buffer, make a helper that hides pointer
increment + wrap, and allows to transparently relax this assumption in
the future.
Signed-off-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <mb@lightnvm.io>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/lightnvm/pblk.h')
| -rw-r--r-- | drivers/lightnvm/pblk.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/lightnvm/pblk.h b/drivers/lightnvm/pblk.h index 22586b78198a..7660811aa8af 100644 --- a/drivers/lightnvm/pblk.h +++ b/drivers/lightnvm/pblk.h @@ -760,6 +760,8 @@ unsigned int pblk_rb_read_commit(struct pblk_rb *rb, unsigned int entries); unsigned int pblk_rb_sync_init(struct pblk_rb *rb, unsigned long *flags); unsigned int pblk_rb_sync_advance(struct pblk_rb *rb, unsigned int nr_entries); +unsigned int pblk_rb_ptr_wrap(struct pblk_rb *rb, unsigned int p, + unsigned int nr_entries); void pblk_rb_sync_end(struct pblk_rb *rb, unsigned long *flags); unsigned int pblk_rb_flush_point_count(struct pblk_rb *rb); |