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authorAl Viro <viro@zeniv.linux.org.uk>2017-06-08 18:15:18 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2017-06-09 16:28:01 -0400
commit414cf7186dbec29bd946c138d6b5c09da5955a08 (patch)
tree0bff4b0b4240f4f2b59963e67dd56e47c68a88c9 /fs/ufs
parent8785d84d002c2ce0f68fbcd6c2c86be859802c7e (diff)
downloadlinux-stericsson-414cf7186dbec29bd946c138d6b5c09da5955a08.tar.gz
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.h10
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;
}