diff options
| author | Al Viro | 2017-06-08 18:15:18 -0400 |
|---|---|---|
| committer | Al Viro | 2017-06-09 16:28:01 -0400 |
| commit | 414cf7186dbec29bd946c138d6b5c09da5955a08 (patch) | |
| tree | 0bff4b0b4240f4f2b59963e67dd56e47c68a88c9 /fs/ufs | |
| parent | 8785d84d002c2ce0f68fbcd6c2c86be859802c7e (diff) | |
fix ufs_isblockset()
Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/ufs')
| -rw-r--r-- | fs/ufs/util.h | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/fs/ufs/util.h b/fs/ufs/util.h index b7fbf53dbc81..398019fb1448 100644 --- a/fs/ufs/util.h +++ b/fs/ufs/util.h @@ -473,15 +473,19 @@ static inline unsigned _ubh_find_last_zero_bit_( static inline int _ubh_isblockset_(struct ufs_sb_private_info * uspi, struct ufs_buffer_head * ubh, unsigned begin, unsigned block) { + u8 mask; switch (uspi->s_fpb) { case 8: return (*ubh_get_addr (ubh, begin + block) == 0xff); case 4: - return (*ubh_get_addr (ubh, begin + (block >> 1)) == (0x0f << ((block & 0x01) << 2))); + mask = 0x0f << ((block & 0x01) << 2); + return (*ubh_get_addr (ubh, begin + (block >> 1)) & mask) == mask; case 2: - return (*ubh_get_addr (ubh, begin + (block >> 2)) == (0x03 << ((block & 0x03) << 1))); + mask = 0x03 << ((block & 0x03) << 1); + return (*ubh_get_addr (ubh, begin + (block >> 2)) & mask) == mask; case 1: - return (*ubh_get_addr (ubh, begin + (block >> 3)) == (0x01 << (block & 0x07))); + mask = 0x01 << (block & 0x07); + return (*ubh_get_addr (ubh, begin + (block >> 3)) & mask) == mask; } return 0; } |