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authorJavier González <javier@javigon.com>2018-10-09 14:12:09 +0300
committerJens Axboe <axboe@kernel.dk>2018-10-09 17:25:08 +0300
commit40b8657dcc0bbd4a293cac1acd4b0b01c0359416 (patch)
tree132bc7832c197a44c16c38a59441803027fad974 /drivers/lightnvm/pblk.h
parentdde4aac20babee040875f76842a31b14b76dd369 (diff)
downloadlinux-40b8657dcc0bbd4a293cac1acd4b0b01c0359416.tar.xz
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.h2
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);