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authorAkinobu Mita <mita@miraclelinux.com>2006-03-26 01:39:53 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-26 08:57:15 -0800
commitb9a2838cc26c4c5369fbd2482acbc5ab60573479 (patch)
tree3569c6b2edc1cf11cc2f34ed185b79009a86c620 /fs/ntfs
parent55b0f8a68ab475cc68f88d1e7a873490869d022e (diff)
downloadlinux-linaro-b9a2838cc26c4c5369fbd2482acbc5ab60573479.tar.gz
[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.c4
-rw-r--r--fs/ntfs/mft.c2
-rw-r--r--fs/ntfs/ntfs.h29
3 files changed, 32 insertions, 3 deletions
diff --git a/fs/ntfs/logfile.c b/fs/ntfs/logfile.c
index 0fd70295cca..4af2ad1193e 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 4e72bc7afdf..2438c00ec0c 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 0624c8ef4d9..166142960b5 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 */