From: Ming Lei <ming.lei@redhat.com>
To: James Bottomley <James.Bottomley@HansenPartnership.com>,
linux-scsi@vger.kernel.org,
"Martin K . Petersen" <martin.petersen@oracle.com>,
linux-block@vger.kernel.org, Jens Axboe <axboe@kernel.dk>
Cc: Ming Lei <ming.lei@redhat.com>, Omar Sandoval <osandov@fb.com>,
Sathya Prakash <sathya.prakash@broadcom.com>,
Chaitra P B <chaitra.basappa@broadcom.com>,
Suganath Prabu Subramani <suganath-prabu.subramani@broadcom.com>,
Kashyap Desai <kashyap.desai@broadcom.com>,
Sumit Saxena <sumit.saxena@broadcom.com>,
Shivasharan S <shivasharan.srikanteshwara@broadcom.com>,
"Ewan D . Milne" <emilne@redhat.com>,
Hannes Reinecke <hare@suse.de>,
Bart Van Assche <bart.vanassche@wdc.com>
Subject: [PATCH 05/10] sbitmap: export sbitmap_weight
Date: Tue, 11 Feb 2020 20:11:30 +0800 [thread overview]
Message-ID: <20200211121135.30064-6-ming.lei@redhat.com> (raw)
In-Reply-To: <20200211121135.30064-1-ming.lei@redhat.com>
SCSI's .device_busy will be converted to sbitmap, and sbitmap_weight
is needed, so export the helper.
Cc: Omar Sandoval <osandov@fb.com>
Cc: Sathya Prakash <sathya.prakash@broadcom.com>
Cc: Chaitra P B <chaitra.basappa@broadcom.com>
Cc: Suganath Prabu Subramani <suganath-prabu.subramani@broadcom.com>
Cc: Kashyap Desai <kashyap.desai@broadcom.com>
Cc: Sumit Saxena <sumit.saxena@broadcom.com>
Cc: Shivasharan S <shivasharan.srikanteshwara@broadcom.com>
Cc: Ewan D. Milne <emilne@redhat.com>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Bart Van Assche <bart.vanassche@wdc.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
---
include/linux/sbitmap.h | 9 +++++++++
lib/sbitmap.c | 11 ++++++-----
2 files changed, 15 insertions(+), 5 deletions(-)
diff --git a/include/linux/sbitmap.h b/include/linux/sbitmap.h
index 103b41c03311..34343ce3ef6c 100644
--- a/include/linux/sbitmap.h
+++ b/include/linux/sbitmap.h
@@ -346,6 +346,15 @@ static inline int sbitmap_test_bit(struct sbitmap *sb, unsigned int bitnr)
*/
void sbitmap_show(struct sbitmap *sb, struct seq_file *m);
+
+/**
+ * sbitmap_weight() - Return how many real bits set in a &struct sbitmap.
+ * @sb: Bitmap to check.
+ *
+ * Return: How many real bits set
+ */
+unsigned int sbitmap_weight(const struct sbitmap *sb);
+
/**
* sbitmap_bitmap_show() - Write a hex dump of a &struct sbitmap to a &struct
* seq_file.
diff --git a/lib/sbitmap.c b/lib/sbitmap.c
index ca1a446574aa..254475865b3d 100644
--- a/lib/sbitmap.c
+++ b/lib/sbitmap.c
@@ -345,20 +345,21 @@ static unsigned int __sbitmap_weight(const struct sbitmap *sb, bool set)
return weight;
}
-static unsigned int sbitmap_weight(const struct sbitmap *sb)
+static unsigned int sbitmap_cleared(const struct sbitmap *sb)
{
- return __sbitmap_weight(sb, true);
+ return __sbitmap_weight(sb, false);
}
-static unsigned int sbitmap_cleared(const struct sbitmap *sb)
+unsigned int sbitmap_weight(const struct sbitmap *sb)
{
- return __sbitmap_weight(sb, false);
+ return __sbitmap_weight(sb, true) - sbitmap_cleared(sb);
}
+EXPORT_SYMBOL_GPL(sbitmap_weight);
void sbitmap_show(struct sbitmap *sb, struct seq_file *m)
{
seq_printf(m, "depth=%u\n", sb->depth);
- seq_printf(m, "busy=%u\n", sbitmap_weight(sb) - sbitmap_cleared(sb));
+ seq_printf(m, "busy=%u\n", sbitmap_weight(sb));
seq_printf(m, "cleared=%u\n", sbitmap_cleared(sb));
seq_printf(m, "bits_per_word=%u\n", 1U << sb->shift);
seq_printf(m, "map_nr=%u\n", sb->map_nr);
--
2.20.1
next prev parent reply other threads:[~2020-02-11 12:12 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-11 12:11 [PATCH 00/10] scsi: tracking device queue depth via sbitmap Ming Lei
2020-02-11 12:11 ` [PATCH 01/10] sbitmap: maintain allocation round_robin in sbitmap Ming Lei
2020-04-14 6:04 ` Hannes Reinecke
2020-02-11 12:11 ` [PATCH 02/10] sbitmap: add helpers for updating allocation hint Ming Lei
2020-04-14 6:05 ` Hannes Reinecke
2020-02-11 12:11 ` [PATCH 03/10] sbitmap: remove sbitmap_clear_bit_unlock Ming Lei
2020-04-14 6:06 ` Hannes Reinecke
2020-02-11 12:11 ` [PATCH 04/10] sbitmap: move allocation hint into sbitmap Ming Lei
2020-02-11 12:11 ` Ming Lei [this message]
2020-02-11 12:11 ` [PATCH 06/10] sbitmap: add helper of sbitmap_calculate_shift Ming Lei
2020-02-11 12:11 ` [PATCH 07/10] blk-mq: return budget token from .get_budget callback Ming Lei
2020-02-11 12:11 ` [PATCH 08/10] blk-mq: pass budget token to dirver via blk_mq_queue_data Ming Lei
2020-02-11 12:11 ` [PATCH 09/10] scsi: add scsi_device_busy() to read sdev->device_busy Ming Lei
2020-02-11 12:11 ` [PATCH 10/10] scsi: replace sdev->device_busy with sbitmap Ming Lei
[not found] ` <202002140428.063yIjwM%lkp@intel.com>
2020-02-14 9:16 ` Ming Lei
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200211121135.30064-6-ming.lei@redhat.com \
--to=ming.lei@redhat.com \
--cc=James.Bottomley@HansenPartnership.com \
--cc=axboe@kernel.dk \
--cc=bart.vanassche@wdc.com \
--cc=chaitra.basappa@broadcom.com \
--cc=emilne@redhat.com \
--cc=hare@suse.de \
--cc=kashyap.desai@broadcom.com \
--cc=linux-block@vger.kernel.org \
--cc=linux-scsi@vger.kernel.org \
--cc=martin.petersen@oracle.com \
--cc=osandov@fb.com \
--cc=sathya.prakash@broadcom.com \
--cc=shivasharan.srikanteshwara@broadcom.com \
--cc=suganath-prabu.subramani@broadcom.com \
--cc=sumit.saxena@broadcom.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).