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| author | Peter Maydell | 2018-05-10 19:10:57 +0200 |
|---|---|---|
| committer | Peter Maydell | 2018-05-10 19:10:57 +0200 |
| commit | cd95fc28fb6d8afced0d70ce52c294d0761a9daa (patch) | |
| tree | e40abcab80b13b762aac605ee27bc93128e48ed7 /include/exec | |
| parent | make sure that we aren't overwriting mc->get_hotplug_handler by accident (diff) | |
| download | qemu-cd95fc28fb6d8afced0d70ce52c294d0761a9daa.tar.gz qemu-cd95fc28fb6d8afced0d70ce52c294d0761a9daa.tar.xz qemu-cd95fc28fb6d8afced0d70ce52c294d0761a9daa.zip | |
atomic.h: Work around gcc spurious "unused value" warning
Some versions of gcc produce a spurious warning if the result of
__atomic_compare_echange_n() is not used and the type involved
is a signed 8 bit value:
error: value computed is not used [-Werror=unused-value]
This has been seen on at least
gcc (Ubuntu 5.4.0-6ubuntu1~16.04.9) 5.4.0 20160609
Work around this by using an explicit cast to void to indicate
that we don't care about the return value.
We don't currently use our atomic_cmpxchg() macro on any signed
8 bit types, but the upcoming support for the Arm v8.1-Atomics
will require it.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Diffstat (limited to 'include/exec')
0 files changed, 0 insertions, 0 deletions