From: Andrew Morton <akpm@linux-foundation.org>
To: "Chanho Min" <chanho.min@lge.com>
Cc: "'Geert Uytterhoeven'" <geert@linux-m68k.org>,
"'Darrick J. Wong'" <djwong@us.ibm.com>,
"'Bob Pearson'" <rpearson@systemfabricworks.com>,
"'Richard Weinberger'" <richard@nod.at>,
"'Herbert Xu'" <herbert@gondor.hengli.com.au>,
<linux-kernel@vger.kernel.org>, <linux-crypto@vger.kernel.org>,
"'Yann Collet'" <yann.collet.73@gmail.com>,
"'Kyungsik Lee'" <kyungsik.lee@lge.com>,
"'Linux/m68k'" <linux-m68k@vger.kernel.org>,
"'sparclinux'" <sparclinux@vger.kernel.org>,
"'Linux-Next'" <linux-next@vger.kernel.org>
Subject: Re: [PATCH 1/2] lib: Add lz4 compressor module
Date: Thu, 25 Apr 2013 15:42:17 -0700 [thread overview]
Message-ID: <20130425154217.c54bd65fba92866c309c94fc@linux-foundation.org> (raw)
In-Reply-To: <5175014e.487a420a.4c58.ffffe0b9SMTPIN_ADDED_BROKEN@mx.google.com>
On Mon, 22 Apr 2013 18:22:18 +0900 "Chanho Min" <chanho.min@lge.com> wrote:
> >> +#define HTYPE const u8*
> >> +
> >> +#ifdef __BIG_ENDIAN
> >> +#define LZ4_NBCOMMONBYTES(val) (__builtin_clz(val) >> 3)
> >> +#else
> >> +#define LZ4_NBCOMMONBYTES(val) (__builtin_ctz(val) >> 3)
> >> +#endif
> >
> >It seems at least m68k and sparc don't have the __builtin_clz() functions:
> >
> >m68k-allmodconfig (http://kisskb.ellerman.id.au/kisskb/buildresult/8572593/):
> >
> >ERROR: "__clzsi2" [lib/lz4/lz4hc_compress.ko] undefined!
> >ERROR: "__clzsi2" [lib/lz4/lz4_compress.ko] undefined!
>
> gcc seems to define __builtin_clz as __clzsi2 in some architecture.
> But, kernel doesn't link libgcc.a.
> If kernel should use gcc's built-in function without libgcc.a,
> do we need to port __clzsi2 to 'arch/*/lib/*'?
This breaks alpha (gcc-4.4.4) as well. Can we please get this fixed
promptly?
next prev parent reply other threads:[~2013-04-25 22:42 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-14 9:48 Chanho Min
2013-04-18 9:50 ` Geert Uytterhoeven
[not found] ` <51750159.07d70e0a.5461.ffffec64SMTPIN_ADDED_BROKEN@mx.google.com>
2013-04-22 9:24 ` Geert Uytterhoeven
2013-04-22 21:29 ` Andrew Morton
[not found] ` <5175014e.487a420a.4c58.ffffe0b9SMTPIN_ADDED_BROKEN@mx.google.com>
2013-04-25 22:42 ` Andrew Morton [this message]
2013-04-26 5:02 ` Chanho Min
2013-04-26 5:51 ` Stephen Rothwell
2013-04-26 19:46 ` Andrew Morton
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20130425154217.c54bd65fba92866c309c94fc@linux-foundation.org \
--to=akpm@linux-foundation.org \
--cc=chanho.min@lge.com \
--cc=djwong@us.ibm.com \
--cc=geert@linux-m68k.org \
--cc=herbert@gondor.hengli.com.au \
--cc=kyungsik.lee@lge.com \
--cc=linux-crypto@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-m68k@vger.kernel.org \
--cc=linux-next@vger.kernel.org \
--cc=richard@nod.at \
--cc=rpearson@systemfabricworks.com \
--cc=sparclinux@vger.kernel.org \
--cc=yann.collet.73@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®