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(parent: d6a38f4) | patch
timekeeping: fix 32-bit overflow in get_monotonic_boottime
authorColin Cross <ccross@android.com>
Wed, 26 Sep 2012 21:21:22 +0000 (14:21 -0700)
committerColin Cross <ccross@android.com>
Wed, 26 Sep 2012 22:04:01 +0000 (15:04 -0700)
commite9babf3472a0bb1bf31f8a3df173d683a86d2da3
tree075c1b028276a2203a4018b0e363b429988f3edbtree | snapshot
parentd6a38f44cf29c8f145c18fa5ac7f41e9b530523ecommit | diff
timekeeping: fix 32-bit overflow in get_monotonic_boottime

get_monotonic_boottime adds three nanonsecond values stored
in longs, followed by an s64.  If the long values are all
close to 1e9 the first three additions can overflow and
become negative when added to the s64.  Cast the first
value to s64 so that all additions are 64 bit.

Change-Id: Ic996d8b6fbef0b72f2d027b0d8ef5259b5c1a540
Signed-off-by: Colin Cross <ccross@android.com>
kernel/time/timekeeping.c diff | blob | history
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