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erofs: cleanup i_format-related stuffs

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Switch EROFS_I_{VERSION,DATALAYOUT}_BITS into
EROFS_I_{VERSION,DATALAYOUT}_MASK.

Also avoid erofs_bitrange() since its functionality is simple enough.

Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Link: https://lore.kernel.org/r/20230414083027.12307-2-hsiangkao@linux.alibaba.com
This commit is contained in:
Gao Xiang
2023-04-14 16:30:27 +08:00
parent 10656f9ca6
commit 745ed7d778
2 changed files with 8 additions and 18 deletions
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8
fs/erofs/erofs_fs.h
View File

@@ -109,14 +109,14 @@ static inline bool erofs_inode_is_data_compressed(unsigned int datamode)
}
/* bit definitions of inode i_format */
#define EROFS_I_VERSION_BITS 1
#define EROFS_I_DATALAYOUT_BITS 3
#define EROFS_I_VERSION_MASK 0x01
#define EROFS_I_DATALAYOUT_MASK 0x07
#define EROFS_I_VERSION_BIT 0
#define EROFS_I_DATALAYOUT_BIT 1
#define EROFS_I_ALL_BIT 4
#define EROFS_I_ALL \
((1 << (EROFS_I_DATALAYOUT_BIT + EROFS_I_DATALAYOUT_BITS)) - 1)
#define EROFS_I_ALL ((1 << EROFS_I_ALL_BIT) - 1)
/* indicate chunk blkbits, thus 'chunksize = blocksize << chunk blkbits' */
#define EROFS_CHUNK_FORMAT_BLKBITS_MASK 0x001F

18
fs/erofs/internal.h
View File

@@ -343,24 +343,14 @@ static inline erofs_off_t erofs_iloc(struct inode *inode)
(EROFS_I(inode)->nid << sbi->islotbits);
}
static inline unsigned int erofs_bitrange(unsigned int value, unsigned int bit,
unsigned int bits)
static inline unsigned int erofs_inode_version(unsigned int ifmt)
{
return (value >> bit) & ((1 << bits) - 1);
return (ifmt >> EROFS_I_VERSION_BIT) & EROFS_I_VERSION_MASK;
}
static inline unsigned int erofs_inode_version(unsigned int value)
static inline unsigned int erofs_inode_datalayout(unsigned int ifmt)
{
return erofs_bitrange(value, EROFS_I_VERSION_BIT,
EROFS_I_VERSION_BITS);
}
static inline unsigned int erofs_inode_datalayout(unsigned int value)
{
return erofs_bitrange(value, EROFS_I_DATALAYOUT_BIT,
EROFS_I_DATALAYOUT_BITS);
return (ifmt >> EROFS_I_DATALAYOUT_BIT) & EROFS_I_DATALAYOUT_MASK;
}
/*