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Message-Id: <1460294020-2111-13-git-send-email-jsimmons@infradead.org>
Date: Sun, 10 Apr 2016 09:13:35 -0400
From: James Simmons <jsimmons@...radead.org>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
devel@...verdev.osuosl.org,
Andreas Dilger <andreas.dilger@...el.com>,
Oleg Drokin <oleg.drokin@...el.com>
Cc: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Lustre Development List <lustre-devel@...ts.lustre.org>,
Andrew Perepechko <andrew_perepechko@...atex.com>,
James Simmons <jsimmons@...radead.org>
Subject: [PATCH 12/17] staging: lustre: lprocfs: implement log2 using bitops
From: Andrew Perepechko <andrew_perepechko@...atex.com>
This patch implements log2 using fls.
Signed-off-by: Andrew Perepechko <andrew_perepechko@...atex.com>
Reviewed-by: Alexander Boyko <Alexander_Boyko@...atex.com>
Reviewed-by: alexander_zarochentsev@...atex.com
Reviewed-by: Vitaly Fertman <Vitaly_Fertman@...atex.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-3496
Xyratex-bug-id: MRP-999
Reviewed-on: http://review.whamcloud.com/6757
Reviewed-by: John L. Hammond <john.hammond@...el.com>
Reviewed-by: Bob Glossman <bob.glossman@...el.com>
Reviewed-by: Oleg Drokin <oleg.drokin@...el.com>
Signed-off-by: James Simmons <jsimmons@...radead.org>
---
.../lustre/lustre/obdclass/lprocfs_status.c | 6 +++---
1 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c b/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c
index d93f42f..172fc91 100644
--- a/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c
+++ b/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c
@@ -1471,10 +1471,10 @@ EXPORT_SYMBOL(lprocfs_oh_tally);
void lprocfs_oh_tally_log2(struct obd_histogram *oh, unsigned int value)
{
- unsigned int val;
+ unsigned int val = 0;
- for (val = 0; ((1 << val) < value) && (val <= OBD_HIST_MAX); val++)
- ;
+ if (likely(value != 0))
+ val = min(fls(value - 1), OBD_HIST_MAX);
lprocfs_oh_tally(oh, val);
}
--
1.7.1
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