linux-kernel - Re: 3.15-rc6 build / link failed fs/built-in mb_cache

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Date:	Mon, 26 May 2014 22:04:45 -0700
From:	Randy Dunlap <rdunlap@...radead.org>
To:	werner <w.landgraf@...ru>, linux-kernel@...r.kernel.org
CC:	"T. Makphaibulchoke" <tmac@...com>,
	Andreas Gruenbacher <a.gruenbacher@...puter.org>,
	"Theodore Ts'o" <tytso@....edu>, Al Viro <viro@...iv.linux.org.uk>
Subject: Re: 3.15-rc6  build / link failed  fs/built-in  mb_cache_entry problems

On 05/26/2014 11:17 AM, werner wrote:
> building the kernel isnt successful,
> 
> problem with _mbècache_entry_release and _get
> 
> see below
> 
> there are also other errors
> 
> 
> The whole compiler list and config, see enclosed
> 
> 

First of all, my build using your kernel config file builds -- no errors,
just plenty of warnings.  I am using gcc version 4.7.2.  What gcc version
are you using?

mbcache.c uses __builtin_log2().  Maybe your gcc version does not support
that builtin function.

@tmac:  can mbcache.c #include <linux/log2.h> and use ilog2(NR_BG_LOCKS)
instead of using __builtin_log2(NR_BG_LOCKS) ?
(ref. commit ID 1f3e55fe02d12213f87869768aa2b0bad3ba9a7d)


> 
> 
> Since appr 3.10 ,  even if the kernels compile and build , on meanwhile 70% of the computers where I try to boot, the booting process crashs on different positions.

Please use return/line feed every 70-72 characters instead of assuming that
all email clients will display the text correctly.  They don't.

> 
> Currently, the quality is rather bad, similar as it was during the versions  2.6.30 ... 36 .
> 
> So it would be good, if the programmers would check everything more careful   (im not a programmer but only an user)
> 
> Enclosed is a compiling list, someone could see through this, and correct all problems, such as mismatches, undefined variables, etc
> 
> 
> W.Landgraf
> 
> 
> 
> 
> 
> ..
> 
> fs/built-in.o: In function `__mb_cache_entry_release':
> mbcache.c:(.text+0xa0d5f): undefined reference to `log2'
> mbcache.c:(.text+0xa0d6b): undefined reference to `__fixunsdfsi'
> mbcache.c:(.text+0xa0e22): undefined reference to `log2'
> mbcache.c:(.text+0xa0e34): undefined reference to `__fixunsdfsi'
> mbcache.c:(.text+0xa0f4e): undefined reference to `log2'
> mbcache.c:(.text+0xa0f60): undefined reference to `__fixunsdfsi'
> fs/built-in.o: In function `__mb_cache_entry_find':
> mbcache.c:(.text+0xa107e): undefined reference to `log2'
> mbcache.c:(.text+0xa108a): undefined reference to `__fixunsdfsi'
> mbcache.c:(.text+0xa115c): undefined reference to `log2'
> mbcache.c:(.text+0xa116e): undefined reference to `__fixunsdfsi'
> mbcache.c:(.text+0xa11dc): undefined reference to `log2'
> mbcache.c:(.text+0xa11e8): undefined reference to `__fixunsdfsi'
> mbcache.c:(.text+0xa126e): undefined reference to `log2'
> mbcache.c:(.text+0xa1280): undefined reference to `__fixunsdfsi'
> fs/built-in.o: In function `mb_cache_entry_get':
> (.text+0xa3bdc): undefined reference to `log2'
> fs/built-in.o: In function `mb_cache_entry_get':
> (.text+0xa3bf1): undefined reference to `__fixunsdfsi'
> fs/built-in.o: In function `mb_cache_entry_get':
> (.text+0xa3d14): undefined reference to `log2'
> fs/built-in.o: In function `mb_cache_entry_get':
> (.text+0xa3d26): undefined reference to `__fixunsdfsi'
> fs/built-in.o: In function `mb_cache_entry_get':
> (.text+0xa3da7): undefined reference to `log2'
> fs/built-in.o: In function `mb_cache_entry_get':
> (.text+0xa3db3): undefined reference to `__fixunsdfsi'
> fs/built-in.o: In function `mb_cache_entry_get':
> (.text+0xa3e5e): undefined reference to `log2'
> fs/built-in.o: In function `mb_cache_entry_get':
> (.text+0xa3e70): undefined reference to `__fixunsdfsi'
> make: [vmlinux] Error 1 (ignored)



-- 
~Randy
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