From c8bf1336824ebd698d37b71763e1c43190f2229a Mon Sep 17 00:00:00 2001 From: "Martin K. Petersen" Date: Fri, 10 Sep 2010 20:07:38 +0200 Subject: [PATCH] Consolidate min_not_zero We have several users of min_not_zero, each of them using their own definition. Move the define to kernel.h. Signed-off-by: Martin K. Petersen Signed-off-by: Jens Axboe --- block/blk-settings.c | 5 ----- drivers/block/drbd/drbd_receiver.c | 1 - drivers/md/dm-snap.c | 2 -- drivers/md/dm-table.c | 5 ----- include/linux/kernel.h | 10 ++++++++++ 5 files changed, 10 insertions(+), 13 deletions(-) diff --git a/block/blk-settings.c b/block/blk-settings.c index a234f4bf1d6f..8d592b559bd3 100644 --- a/block/blk-settings.c +++ b/block/blk-settings.c @@ -455,11 +455,6 @@ void blk_queue_io_opt(struct request_queue *q, unsigned int opt) } EXPORT_SYMBOL(blk_queue_io_opt); -/* - * Returns the minimum that is _not_ zero, unless both are zero. - */ -#define min_not_zero(l, r) (l == 0) ? r : ((r == 0) ? l : min(l, r)) - /** * blk_queue_stack_limits - inherit underlying queue limits for stacked drivers * @t: the stacking driver (top) diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c index 081522d3c742..484ecbb6b772 100644 --- a/drivers/block/drbd/drbd_receiver.c +++ b/drivers/block/drbd/drbd_receiver.c @@ -2972,7 +2972,6 @@ static int receive_sizes(struct drbd_conf *mdev, struct p_header *h) * we still need to figure out whether we accept that. */ mdev->p_size = p_size; -#define min_not_zero(l, r) (l == 0) ? r : ((r == 0) ? l : min(l, r)) if (get_ldev(mdev)) { warn_if_differ_considerably(mdev, "lower level device sizes", p_size, drbd_get_max_capacity(mdev->ldev)); diff --git a/drivers/md/dm-snap.c b/drivers/md/dm-snap.c index 5974d3094d97..f30f6e8d594e 100644 --- a/drivers/md/dm-snap.c +++ b/drivers/md/dm-snap.c @@ -706,8 +706,6 @@ static int dm_add_exception(void *context, chunk_t old, chunk_t new) return 0; } -#define min_not_zero(l, r) (((l) == 0) ? (r) : (((r) == 0) ? (l) : min(l, r))) - /* * Return a minimum chunk size of all snapshots that have the specified origin. * Return zero if the origin has no snapshots. diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c index f9fc07d7a4b9..90267f8d64ee 100644 --- a/drivers/md/dm-table.c +++ b/drivers/md/dm-table.c @@ -486,11 +486,6 @@ static int __table_get_device(struct dm_table *t, struct dm_target *ti, return 0; } -/* - * Returns the minimum that is _not_ zero, unless both are zero. - */ -#define min_not_zero(l, r) (l == 0) ? r : ((r == 0) ? l : min(l, r)) - int dm_set_device_limits(struct dm_target *ti, struct dm_dev *dev, sector_t start, sector_t len, void *data) { diff --git a/include/linux/kernel.h b/include/linux/kernel.h index 2b0a35e6bc69..f5df2f4acb0d 100644 --- a/include/linux/kernel.h +++ b/include/linux/kernel.h @@ -640,6 +640,16 @@ static inline void ftrace_dump(enum ftrace_dump_mode oops_dump_mode) { } (void) (&_max1 == &_max2); \ _max1 > _max2 ? _max1 : _max2; }) +/** + * min_not_zero - return the minimum that is _not_ zero, unless both are zero + * @x: value1 + * @y: value2 + */ +#define min_not_zero(x, y) ({ \ + typeof(x) __x = (x); \ + typeof(y) __y = (y); \ + __x == 0 ? __y : ((__y == 0) ? __x : min(__x, __y)); }) + /** * clamp - return a value clamped to a given range with strict typechecking * @val: current value -- 2.20.1