From: Andrew Perepechko <andrew_perepec...@xyratex.com> This patch implements log2 using fls.
Reviewed-by: alexander_zarochent...@xyratex.com Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-3496 Signed-off-by: Andrew Perepechko <andrew_perepec...@xyratex.com> Reviewed-by: Alexander Boyko <alexander_bo...@xyratex.com> Reviewed-by: Vitaly Fertman <vitaly_fert...@xyratex.com> Lustre-change: http://review.whamcloud.com/6757 Reviewed-by: John L. Hammond <john.hamm...@intel.com> Reviewed-by: Bob Glossman <bob.gloss...@intel.com> Reviewed-by: Oleg Drokin <oleg.dro...@intel.com> Signed-off-by: Peng Tao <bergw...@gmail.com> Signed-off-by: Andreas Dilger <andreas.dil...@intel.com> --- .../lustre/lustre/obdclass/lprocfs_status.c | 6 +++--- 1 file 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 428a023..b2647c8 100644 --- a/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c +++ b/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c @@ -1961,10 +1961,10 @@ 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); } -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
