From: Mikulas Patocka Date: Fri, 10 Oct 2008 12:37:00 +0000 (+0100) Subject: dm exception store: introduce area_location function X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=a481db784682b33d078c7bf8a1d0581dc09946c1;p=deliverable%2Flinux.git dm exception store: introduce area_location function Move this logic to a function, because it will be reused later. Signed-off-by: Mikulas Patocka Signed-off-by: Alasdair G Kergon --- diff --git a/drivers/md/dm-exception-store.c b/drivers/md/dm-exception-store.c index 41f408068a7c..824cf31967c5 100644 --- a/drivers/md/dm-exception-store.c +++ b/drivers/md/dm-exception-store.c @@ -208,6 +208,14 @@ static int chunk_io(struct pstore *ps, uint32_t chunk, int rw, int metadata) return req.result; } +/* + * Convert a metadata area index to a chunk index. + */ +static chunk_t area_location(struct pstore *ps, chunk_t area) +{ + return 1 + ((ps->exceptions_per_area + 1) * area); +} + /* * Read or write a metadata area. Remembering to skip the first * chunk which holds the header. @@ -217,8 +225,7 @@ static int area_io(struct pstore *ps, uint32_t area, int rw) int r; uint32_t chunk; - /* convert a metadata area index to a chunk index */ - chunk = 1 + ((ps->exceptions_per_area + 1) * area); + chunk = area_location(ps, area); r = chunk_io(ps, chunk, rw, 0); if (r)