user/sven/linux.git/include/linux/lcm.h, branch v3.2.45Linux Kernel
https://git.stealer.net/cgit.cgi/user/sven/linux.git/atom?h=v3.2.452010-03-15T11:47:59Zblock: Fix overrun in lcm() and move it to lib2010-03-15T11:47:59ZMartin K. Petersenmartin.petersen@oracle.com2010-03-15T11:46:51Zurn:sha1:2cda2728aa1c8c006418a24f867b25e5eb7a32e2
lcm() was defined to take integer-sized arguments. The supplied
arguments are multiplied, however, causing us to overflow given
sufficiently large input. That in turn led to incorrect optimal I/O
size reporting in some cases (RAID over RAID).
Switch lcm() over to unsigned long similar to gcd() and move the
function from blk-settings.c to lib.
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>