From: Peter Zijlstra <peterz@infradead.org>
To: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>,
Randy Dunlap <rdunlap@infradead.org>,
Andrew Morton <akpm@linux-foundation.org>,
broonie@kernel.org, linux-fsdevel@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
linux-next@vger.kernel.org, mhocko@suse.cz,
mm-commits@vger.kernel.org, sfr@canb.auug.org.au,
Linus Torvalds <torvalds@linux-foundation.org>,
viro@zeniv.linux.org.uk, x86@kernel.org,
Steven Rostedt <rostedt@goodmis.org>
Subject: Re: mmotm 2020-05-13-20-30 uploaded (objtool warnings)
Date: Fri, 29 May 2020 18:54:19 +0200 [thread overview]
Message-ID: <20200529165419.GF706460@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20200529165011.o7vvhn4wcj6zjxux@treble>
On Fri, May 29, 2020 at 11:50:11AM -0500, Josh Poimboeuf wrote:
> The nested likelys seem like overkill anyway -- user_access_begin() is
> __always_inline and it already has unlikely(), which should be
> propagated.
>
> So just remove the outer likelys?
That fixes it. Ack!
> diff --git a/arch/x86/lib/csum-wrappers_64.c b/arch/x86/lib/csum-wrappers_64.c
> index a12b8629206d..ee63d7576fd2 100644
> --- a/arch/x86/lib/csum-wrappers_64.c
> +++ b/arch/x86/lib/csum-wrappers_64.c
> @@ -27,7 +27,7 @@ csum_and_copy_from_user(const void __user *src, void *dst,
> might_sleep();
> *errp = 0;
>
> - if (!likely(user_access_begin(src, len)))
> + if (!user_access_begin(src, len))
> goto out_err;
>
> /*
> @@ -89,7 +89,7 @@ csum_and_copy_to_user(const void *src, void __user *dst,
>
> might_sleep();
>
> - if (unlikely(!user_access_begin(dst, len))) {
> + if (!user_access_begin(dst, len)) {
> *errp = -EFAULT;
> return 0;
> }
>
next prev parent reply other threads:[~2020-05-29 16:57 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20200513175005.1f4839360c18c0238df292d1@linux-foundation.org>
2020-05-14 3:31 ` mmotm 2020-05-13-20-30 uploaded Andrew Morton
2020-05-14 15:30 ` mmotm 2020-05-13-20-30 uploaded (gpu/drm/bridge/sil-sii8620) Randy Dunlap
2020-05-14 15:32 ` mmotm 2020-05-13-20-30 uploaded (objtool warnings) Randy Dunlap
2020-05-14 15:33 ` Randy Dunlap
2020-05-28 15:54 ` Josh Poimboeuf
2020-05-28 17:04 ` Josh Poimboeuf
2020-05-28 17:20 ` Peter Zijlstra
2020-05-29 13:57 ` Christoph Hellwig
2020-05-29 14:35 ` Peter Zijlstra
2020-05-29 14:53 ` Peter Zijlstra
2020-05-29 15:33 ` Peter Zijlstra
2020-05-29 16:05 ` Josh Poimboeuf
2020-05-29 16:12 ` Peter Zijlstra
2020-05-29 16:50 ` Josh Poimboeuf
2020-05-29 16:54 ` Peter Zijlstra [this message]
2020-05-29 17:25 ` [PATCH] x86/uaccess: Remove redundant likely/unlikely annotations Josh Poimboeuf
2020-05-29 18:29 ` Randy Dunlap
2020-05-29 19:31 ` mmotm 2020-05-13-20-30 uploaded (objtool warnings) Linus Torvalds
2020-05-29 20:08 ` Al Viro
2020-05-29 20:14 ` Al Viro
2020-05-15 23:30 ` mmotm 2020-05-15-16-29 uploaded Andrew Morton
2020-05-16 5:53 ` Stephen Rothwell
2020-05-18 23:15 ` Stephen Rothwell
2020-05-20 4:48 ` mmotm 2020-05-19-21-47 uploaded Andrew Morton
2020-05-22 3:43 ` mmotm 2020-05-21-20-42 uploaded Andrew Morton
2020-05-22 16:26 ` mmotm 2020-05-21-20-42 uploaded (atomisp) Randy Dunlap
2020-05-23 3:36 ` mmotm 2020-05-22-20-35 uploaded Andrew Morton
2020-05-23 15:08 ` mmotm 2020-05-22-20-35 uploaded (phy/intel/phy-intel-combo.c) Randy Dunlap
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