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| author | Akinobu Mita <mita@miraclelinux.com> | 2006-03-26 01:39:53 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-26 08:57:15 -0800 |
| commit | b9a2838cc26c4c5369fbd2482acbc5ab60573479 (patch) | |
| tree | 3569c6b2edc1cf11cc2f34ed185b79009a86c620 /fs/ntfs | |
| parent | 55b0f8a68ab475cc68f88d1e7a873490869d022e (diff) | |
| download | lwn-b9a2838cc26c4c5369fbd2482acbc5ab60573479.tar.gz lwn-b9a2838cc26c4c5369fbd2482acbc5ab60573479.zip | |
[PATCH] bitops: ntfs: remove generic_ffs()
Now the only user who are using generic_ffs() is ntfs filesystem. This patch
isolates generic_ffs() as ntfs_ffs() for ntfs.
Signed-off-by: Akinobu Mita <mita@miraclelinux.com>
Cc: Anton Altaparmakov <aia21@cantab.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/ntfs')
| -rw-r--r-- | fs/ntfs/logfile.c | 4 | ||||
| -rw-r--r-- | fs/ntfs/mft.c | 2 | ||||
| -rw-r--r-- | fs/ntfs/ntfs.h | 29 |
3 files changed, 32 insertions, 3 deletions
diff --git a/fs/ntfs/logfile.c b/fs/ntfs/logfile.c index 0fd70295cca6..4af2ad1193ec 100644 --- a/fs/ntfs/logfile.c +++ b/fs/ntfs/logfile.c @@ -515,10 +515,10 @@ BOOL ntfs_check_logfile(struct inode *log_vi, RESTART_PAGE_HEADER **rp) log_page_size = PAGE_CACHE_SIZE; log_page_mask = log_page_size - 1; /* - * Use generic_ffs() instead of ffs() to enable the compiler to + * Use ntfs_ffs() instead of ffs() to enable the compiler to * optimize log_page_size and log_page_bits into constants. */ - log_page_bits = generic_ffs(log_page_size) - 1; + log_page_bits = ntfs_ffs(log_page_size) - 1; size &= ~(s64)(log_page_size - 1); /* * Ensure the log file is big enough to store at least the two restart diff --git a/fs/ntfs/mft.c b/fs/ntfs/mft.c index 4e72bc7afdf9..2438c00ec0ce 100644 --- a/fs/ntfs/mft.c +++ b/fs/ntfs/mft.c @@ -2670,7 +2670,7 @@ mft_rec_already_initialized: ni->name_len = 4; ni->itype.index.block_size = 4096; - ni->itype.index.block_size_bits = generic_ffs(4096) - 1; + ni->itype.index.block_size_bits = ntfs_ffs(4096) - 1; ni->itype.index.collation_rule = COLLATION_FILE_NAME; if (vol->cluster_size <= ni->itype.index.block_size) { ni->itype.index.vcn_size = vol->cluster_size; diff --git a/fs/ntfs/ntfs.h b/fs/ntfs/ntfs.h index 0624c8ef4d9c..166142960b53 100644 --- a/fs/ntfs/ntfs.h +++ b/fs/ntfs/ntfs.h @@ -132,4 +132,33 @@ extern int ntfs_ucstonls(const ntfs_volume *vol, const ntfschar *ins, /* From fs/ntfs/upcase.c */ extern ntfschar *generate_default_upcase(void); +static inline int ntfs_ffs(int x) +{ + int r = 1; + + if (!x) + return 0; + if (!(x & 0xffff)) { + x >>= 16; + r += 16; + } + if (!(x & 0xff)) { + x >>= 8; + r += 8; + } + if (!(x & 0xf)) { + x >>= 4; + r += 4; + } + if (!(x & 3)) { + x >>= 2; + r += 2; + } + if (!(x & 1)) { + x >>= 1; + r += 1; + } + return r; +} + #endif /* _LINUX_NTFS_H */ |