Re: 2.6.23-rc8-mm1

[Josef Sipek <jsipek@cs.sunysb.edu>]

On Tue, Sep 25, 2007 at 10:26:37AM -0700, Randy Dunlap wrote:
> On Tue, 25 Sep 2007 01:46:25 -0700 Andrew Morton wrote:
> 
> > 
> > ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.23-rc8/2.6.23-rc8-mm1/
> > 
> > - Various fixes against 2.6.23-rc7-mm1.
> > 
> > 
> >  git-unionfs.patch
> 
> in unionfs debug.c:
> 
> #if BITS_PER_LONG == 32
> #define POISONED_PTR		((void*) 0x5a5a5a5a)
> #elif BITS_PER_LONG == 64
> #define POISONED_PTR		((void*) 0x5a5a5a5a5a5a5a5a)
> #else
> #error Unknown BITS_PER_LONG value
> #endif /* BITS_PER_LONG != known */
> 
> 
> We try to keep all poison values in include/linux/poison.h so that
> when digging around for them, it's easier to locate the one in
> question.
 
Right. I didn't want to introduce this kind of ifdef, the 0x5a pattern is
also the same as POISON_INUSE. I guess, using the 32-bit poison value should
be good enough anyway.

> Also, on x86_64, the 64-bit version wants a L or UL suffix:
> 
> fs/unionfs/debug.c:96:30: warning: constant 0x5a5a5a5a5a5a5a5a is so big it is long
> fs/unionfs/debug.c:264:30: warning: constant 0x5a5a5a5a5a5a5a5a is so big it is long

Strange...I didn't get the warning when I compile tested; but it's valid.

Josef 'Jeff' Sipek.

-- 
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