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compiler: add a sizeof_field() macro

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Determining the size of a field is useful when you don't have a struct
variable handy.  Open-coding this is ugly.

This patch adds the sizeof_field() macro, which is similar to
typeof_field().  Existing instances are updated to use the macro.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Message-id: 20180614164431.29305-1-stefanha@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2018-06-14 17:44:31 +01:00
parent 00928a421d
commit f18793b096
9 changed files with 24 additions and 22 deletions
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2
accel/tcg/translate-all.c
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@ -191,7 +191,7 @@ struct page_collection {
/* Make sure all possible CPU event bits fit in tb->trace_vcpu_dstate */
QEMU_BUILD_BUG_ON(CPU_TRACE_DSTATE_MAX_EVENTS >
sizeof(((TranslationBlock *)0)->trace_vcpu_dstate)
sizeof_field(TranslationBlock, trace_vcpu_dstate)
* BITS_PER_BYTE);
/*