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| author | Paolo Bonzini <pbonzini@redhat.com> | 2016-08-09 15:02:24 -0400 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2016-08-09 22:57:36 +0200 |
| commit | 5927ed846ad17e1cc8e9f60f50486ec418829776 (patch) | |
| tree | 7b57d6b9b2a96f9f93512dc6ee78bd51633197a2 /HACKING | |
| parent | 9d4cd7b4ed413a1371997ce74da39900b2a8473b (diff) | |
| download | qemu-5927ed846ad17e1cc8e9f60f50486ec418829776.tar.gz | |
atomic: strip "const" from variables declared with typeof
With the latest clang, we have the following warning:
/home/pranith/devops/code/qemu/include/qemu/seqlock.h:62:21: warning: passing 'typeof (*&sl->sequence) *' (aka 'const unsigned int *') to parameter of type 'unsigned int *' discards qualifiers [-Wincompatible-pointer-types-discards-qualifiers]
return unlikely(atomic_read(&sl->sequence) != start);
^~~~~~~~~~~~~~~~~~~~~~~~~~
/home/pranith/devops/code/qemu/include/qemu/atomic.h:58:25: note: expanded from macro 'atomic_read'
__atomic_load(ptr, &_val, __ATOMIC_RELAXED); \
^~~~~
Stripping const is a bit tricky due to promotions, but it is doable
with either C11 _Generic or GCC extensions. Use the latter.
Reported-by: Pranith Kumar <bobby.prani@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
[pranith: Add conversion for bool type]
Signed-off-by: Pranith Kumar <bobby.prani@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'HACKING')
0 files changed, 0 insertions, 0 deletions