From: Andrew Perepechko <[email protected]> This patch implements log2 using fls.
Signed-off-by: Andrew Perepechko <[email protected]> Reviewed-by: Alexander Boyko <[email protected]> Reviewed-by: [email protected] Reviewed-by: Vitaly Fertman <[email protected]> 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 <[email protected]> Reviewed-by: Bob Glossman <[email protected]> Reviewed-by: Oleg Drokin <[email protected]> Signed-off-by: James Simmons <[email protected]> --- .../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 _______________________________________________ devel mailing list [email protected] http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
