From: David Miller <davem@davemloft.net>
To: herbert@gondor.apana.org.au
Cc: garsilva@embeddedor.com, steffen.klassert@secunet.com,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] net: xfrm_user: use BUG_ON instead of if condition followed by BUG
Date: Tue, 24 Oct 2017 17:48:42 +0900 (KST) [thread overview]
Message-ID: <20171024.174842.272234711073180328.davem@davemloft.net> (raw)
In-Reply-To: <20171024035320.GA29795@gondor.apana.org.au>
From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Tue, 24 Oct 2017 11:53:20 +0800
> No your patch makes it worse. The original construct makes it
> clear that the conditional is real code and not just some debugging
> aid.
>
> With your patch, real code is now inside BUG_ON.
This discussion has happened before.
But I'll explain the conclusion here for your benefit.
BUG_ON() is a statement and everything inside of it will
always execute.
BUG_ON() is always preferred because it allows arch
specific code to pass the conditional result properly
into inline asm and builtins for optimal code generation.
next prev parent reply other threads:[~2017-10-24 8:48 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-23 18:18 Gustavo A. R. Silva
2017-10-24 3:25 ` Herbert Xu
2017-10-24 3:50 ` Gustavo A. R. Silva
2017-10-24 3:53 ` Herbert Xu
2017-10-24 3:57 ` Gustavo A. R. Silva
2017-10-24 4:01 ` Alexei Starovoitov
2017-10-24 4:30 ` Herbert Xu
2017-10-24 8:48 ` David Miller [this message]
2017-10-25 4:05 ` Herbert Xu
2017-10-25 4:22 ` David Miller
2017-10-25 7:28 ` Steffen Klassert
2017-10-25 16:43 ` Gustavo A. R. Silva
2017-10-26 0:38 ` Gustavo A. R. Silva
2017-10-26 6:36 ` Herbert Xu
2017-10-26 10:47 ` Gustavo A. R. Silva
2017-10-26 11:31 ` [PATCH v2] " Gustavo A. R. Silva
2017-10-27 10:46 ` Steffen Klassert
2017-10-27 20:56 ` Gustavo A. R. Silva
2017-10-24 8:47 ` [PATCH] " David Miller
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