From: David Howells Date: Tue, 14 Jun 2011 23:59:04 +0000 (+0100) Subject: DRBD: Fix comparison always false warning due to long/long long compare X-Git-Tag: v3.8-rc1~78^2~18^2~183 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=3b7cd457d0c8458f6a4df2854f75fd80c0338f93;p=profile%2Fivi%2Fkernel-x86-ivi.git DRBD: Fix comparison always false warning due to long/long long compare Fix warnings of the following nature in the drbd header: In file included from drivers/block/drbd/drbd_bitmap.c:32: drivers/block/drbd/drbd_int.h: In function 'drbd_get_syncer_progress': drivers/block/drbd/drbd_int.h:2234: warning: comparison is always false due to limited range of data where mdev->rs_total (an unsigned long) is being compared to 1ULL << 32, which is always false on a 32-bit machine. Signed-off-by: David Howells Signed-off-by: Lars Ellenberg --- diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h index ece2e4a..de42c7c 100644 --- a/drivers/block/drbd/drbd_int.h +++ b/drivers/block/drbd/drbd_int.h @@ -2071,7 +2071,7 @@ static inline void drbd_get_syncer_progress(struct drbd_conf *mdev, * Note: currently we don't support such large bitmaps on 32bit * arch anyways, but no harm done to be prepared for it here. */ - unsigned int shift = mdev->rs_total >= (1ULL << 32) ? 16 : 10; + unsigned int shift = mdev->rs_total > UINT_MAX ? 16 : 10; unsigned long left = *bits_left >> shift; unsigned long total = 1UL + (mdev->rs_total >> shift); unsigned long tmp = 1000UL - left * 1000UL/total;