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authorStefan Hajnoczi <stefanha@redhat.com>2015-03-23 15:29:28 +0000
committerKevin Wolf <kwolf@redhat.com>2015-04-28 15:36:08 +0200
commitc9d933185181cb1cf81bc4c9e5c3a10a5934b017 (patch)
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sd: convert sd_normal_command() ffs(3) call to ctz32()
ffs() cannot be replaced with ctz32() when the argument might be zero, because ffs(0) returns 0 while ctz32(0) returns 32. The ffs(3) call in sd_normal_command() is a special case though. It can be converted to ctz32() + 1 because the argument is never zero: if (!(req.arg >> 8) || (req.arg >> (ctz32(req.arg & ~0xff) + 1))) { ~~~~~~~~~~~~~~~ ^--------------- req.arg cannot be zero Cc: Markus Armbruster <armbru@redhat.com> Cc: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Message-id: 1427124571-28598-7-git-send-email-stefanha@redhat.com Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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