fat: accessors for msdos_dir_entry 'start' fields
Simplify code by providing accessor functions for the directory entry
start cluster fields.
Signed-off-by: Steven J. Magnani <steve@digidescorp.com>
Acked-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/fat/fat.h b/fs/fat/fat.h
index fc35c5c..2deeeb8 100644
--- a/fs/fat/fat.h
+++ b/fs/fat/fat.h
@@ -217,6 +217,21 @@
#endif
}
+static inline int fat_get_start(const struct msdos_sb_info *sbi,
+ const struct msdos_dir_entry *de)
+{
+ int cluster = le16_to_cpu(de->start);
+ if (sbi->fat_bits == 32)
+ cluster |= (le16_to_cpu(de->starthi) << 16);
+ return cluster;
+}
+
+static inline void fat_set_start(struct msdos_dir_entry *de, int cluster)
+{
+ de->start = cpu_to_le16(cluster);
+ de->starthi = cpu_to_le16(cluster >> 16);
+}
+
static inline void fatwchar_to16(__u8 *dst, const wchar_t *src, size_t len)
{
#ifdef __BIG_ENDIAN