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| author | Xi Wang <xi.wang@gmail.com> | 2012-11-11 11:20:01 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-11-11 17:53:13 -0500 |
| commit | 0c9f79be295c99ac7e4b569ca493d75fdcc19e4e (patch) | |
| tree | 86ac3ac72907079585afc43ec2a25edcb8bb051b /kernel/rtmutex.c | |
| parent | 77b67063bb6bce6d475e910d3b886a606d0d91f7 (diff) | |
| download | blackbird-op-linux-0c9f79be295c99ac7e4b569ca493d75fdcc19e4e.tar.gz blackbird-op-linux-0c9f79be295c99ac7e4b569ca493d75fdcc19e4e.zip | |
ipv4: avoid undefined behavior in do_ip_setsockopt()
(1<<optname) is undefined behavior in C with a negative optname or
optname larger than 31. In those cases the result of the shift is
not necessarily zero (e.g., on x86).
This patch simplifies the code with a switch statement on optname.
It also allows the compiler to generate better code (e.g., using a
64-bit mask).
Signed-off-by: Xi Wang <xi.wang@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'kernel/rtmutex.c')
0 files changed, 0 insertions, 0 deletions
