From: Raj Inguva <rajsk@in.ibm.com>
To: Kirill Korotaev <kksx@mail.ru>
Cc: linux-kernel@vger.kernel.org
Subject: Re: atomic_set & gcc. atomicity question
Date: Thu, 31 Jul 2003 16:16:57 +0530 [thread overview]
Message-ID: <3F28F3A1.B7114CD@in.ibm.com> (raw)
In-Reply-To: E19iAEA-0006Fy-00.kksx-mail-ru@f6.mail.ru
> #define atomic_set(v,i) (((v)->counter) = (i))
'v' is of type atomic_t which is a structure.
> If we call atomic_set() with constant 2nd argument it's ok - it's a > simple write to var. But what if we do atomic_set(var, var1+var2)?
It will expand to (((var)->counter) = (var1+var2))
'counter' is 'volatile' .
prev parent reply other threads:[~2003-07-31 10:40 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-07-31 10:00 atomic_set & gcc. atomicity question "Kirill Korotaev"
2003-07-31 10:46 ` Raj Inguva [this message]
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