From 40b8657dcc0bbd4a293cac1acd4b0b01c0359416 Mon Sep 17 00:00:00 2001 From: Javier González Date: Tue, 9 Oct 2018 13:12:09 +0200 Subject: lightnvm: pblk: encapsulate rb pointer operations MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Signed-off-by: Matias Bjørling Signed-off-by: Jens Axboe --- drivers/lightnvm/pblk.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/lightnvm/pblk.h') 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); -- cgit v1.2.3