Re: 2.6.14-rc2-mm2

[Laurent Riffard <laurent.riffard@free.fr>]

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Le 30.09.2005 11:20, Alexander Zarochentsev a écrit :
> On Friday 30 September 2005 12:45, Laurent Riffard wrote:
> 
>>Le 30.09.2005 01:54, Brice Goglin a écrit :
>>
>>>Le 30.09.2005 01:40, Michal Piotrowski a écrit :
>>>
>>>>It maybe a problem with gentoo gcc.
>>>
>>>I'm seeing the same error with Debian gcc4.
>>>
>>>bgoglin@puligny:/usr/src/linux-mm$ gcc --version
>>>gcc (GCC) 4.0.1 (Debian 4.0.1-2)
>>>
>>>By the way, the error appears when compiling
>>>  CC [M]  fs/reiser4/debug.o
>>>while DEBUG is disabled for REISER4.
>>>
>>>My .config attached
>>>Note that Alexandre forgot to reenable Reiser4 in the .config he sent.
>>>
>>>Regards,
>>>Brice
>>
>>It seems to appear when CONFIG_SMP=N and CONFIG_DEBUG_SPINLOCK=N and
>>CONFIG_REISER4_DEBUG=N.
>>
>>In this case, spinlock_t is an empty struct (see
>>include/linux/spinlock_types.h and
>>include/linux/spinlock_types_up.h). Then sizeof(spinlock_t) _is_ 0,
>>and this breaks some code like cassert calls from
>>fs/reiser4/spin_macros.h line 85 (FIELD is a spinlock_t) :
>>     82 static inline void spin_ ## NAME ## _init(TYPE *x)      \
>>     83 {                                                       \
>>
>>     84         __ODCA("nikita-2987", x != NULL);               \
>>     85         cassert(sizeof(x->FIELD) != 0);                 \
>>
>>     86         memset(& x->FIELD, 0, sizeof x->FIELD);         \
>>
>>     87         spin_lock_init(& x->FIELD.lock);                \
>>
>>     88 }                                                       \
>>
>>     89
> 
> 
> correct. 
> 
> the code will be reworked soon,
> a hot fix for now is:
>  
> -----------------------------------
> diff --git a/spin_macros.h b/spin_macros.h
> --- a/spin_macros.h
> +++ b/spin_macros.h
> @@ -82,8 +82,6 @@ typedef struct reiser4_rw_data {
>  static inline void spin_ ## NAME ## _init(TYPE *x)				\
>  {										\
>  	__ODCA("nikita-2987", x != NULL);					\
> -	cassert(sizeof(x->FIELD) != 0);						\
> -	memset(& x->FIELD, 0, sizeof x->FIELD);					\
>  	spin_lock_init(& x->FIELD.lock);					\
>  }										\
>  										\
> @@ -236,7 +234,6 @@ typedef struct { int foo; } NAME ## _spi
>  static inline void rw_ ## NAME ## _init(TYPE *x)				\
>  {										\
>  	__ODCA("nikita-2988", x != NULL);					\
> -	memset(& x->FIELD, 0, sizeof x->FIELD);					\
>  	rwlock_init(& x->FIELD.lock);						\
>  }										\
>  										\
> -----------------------------------
> 
> 
>>~~
>>laurent

Ok, compiled and booted.

[root@antares ~]# cat /proc/version
Linux version 2.6.14-rc2-mm2 (laurent@antares.localdomain) (gcc
version 4.0.1 (4.0.1-5mdk for Mandriva Linux release 2006.0)) #6 Fri
Sep 30 11:30:02 CEST 2005

thanks
~~
laurent
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