Re: [PATCH 9/9]ext4 super block changes for >32 bit blocks numbers

[Mingming Cao <cmm@us.ibm.com>]

Andrew Morton wrote:

> On Wed, 09 Aug 2006 18:22:25 -0700
> Mingming Cao <cmm@us.ibm.com> wrote:
>
>
> > In-kernel and on-disk super block changes to support >32 bit blocks numbers.
> >
> > +static inline u32 EXT4_RELATIVE_ENCODE(ext4_fsblk_t group_base,
> > +				       ext4_fsblk_t fs_block)
> > +{
> > +	s32 gdp_block;
> > +
> > +	if (fs_block < (1ULL<<32) && group_base < (1ULL<<32))
> > +		return fs_block;
> > +
> > +	gdp_block = (fs_block - group_base);
> > +	BUG_ON ((group_base + gdp_block) != fs_block);
> > +
> > +	return gdp_block;
> > +}
> > +
> > +static inline ext4_fsblk_t EXT4_RELATIVE_DECODE(ext4_fsblk_t group_base,
> > +						u32 gdp_block)
> > +{
> > +	if (group_base >= (1ULL<<32))
> > +		return group_base + (s32) gdp_block;
> > +
> > +	if ((s32) gdp_block >= 0 && gdp_block < group_base &&
> > +		  group_base + gdp_block >= (1ULL<<32))
> > +		return group_base + gdp_block;
> > +
> > +	return gdp_block;
> > +}
>
>
> These seem far too large and far too commonly called to be inlined.
>
>
> > +
> > +#define EXT4_BLOCKS_COUNT(s)	\
> > +	(ext4_fsblk_t)(((__u64)le32_to_cpu((s)->s_blocks_count_hi) << 32) |	\
> > +	 	(__u64)le32_to_cpu((s)->s_blocks_count))
> > +#define EXT4_BLOCKS_COUNT_SET(s,v)	do {				\
> > +	(s)->s_blocks_count = cpu_to_le32((v));				\
> > +	(s)->s_blocks_count_hi = cpu_to_le32(((__u64)(v)) >> 32);	\
> > +} while (0)
> > +
> > +#define EXT4_R_BLOCKS_COUNT(s)	\
> > +	(ext4_fsblk_t)(((__u64)le32_to_cpu((s)->s_r_blocks_count_hi) << 32) |	\
> > +		 (__u64)le32_to_cpu((s)->s_r_blocks_count))
> > +#define EXT4_R_BLOCKS_COUNT_SET(s,v)	do {				\
> > +	(s)->s_r_blocks_count = cpu_to_le32((v));			\
> > +	(s)->s_r_blocks_count_hi = cpu_to_le32(((__u64)(v)) >> 32);	\
> > +} while (0)
> > +
> > +#define EXT4_FREE_BLOCKS_COUNT(s)					\
> > +	(ext4_fsblk_t)(((__u64)le32_to_cpu((s)->s_free_blocks_count_hi) << 32) | \
> > +		 (__u64)le32_to_cpu((s)->s_free_blocks_count))
> > +#define EXT4_FREE_BLOCKS_COUNT_SET(s,v)	do {				\
> > +	(s)->s_free_blocks_count = cpu_to_le32((v));			\
> > +	(s)->s_free_blocks_count_hi = cpu_to_le32(((__u64)(v)) >> 32);	\
> > +} while (0)
>
>
> Can these not be implemented as C functions?
Okay, I will work with Laurent/Alex to fix this.:)

Mingming

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/