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authorCarmeli Tamir <carmeli.tamir@gmail.com>2019-01-03 15:27:56 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2019-01-04 13:13:47 -0800
commitd19dc016187502dda6b8095e44eb46a18e89b2b3 (patch)
treedf18933008b02a918ce4764d95fb688198bc6e05 /fs/fat
parentb553337a57cf4f077464292520f4e975ea4cda83 (diff)
downloadlinux-d19dc016187502dda6b8095e44eb46a18e89b2b3.tar.bz2
fat: move MAX_FAT to fat.h and change it to inline function
MAX_FAT is useless in msdos_fs.h, since it uses the MSDOS_SB function that is defined in fat.h. So really, this macro can be only called from code that already includes fat.h. Hence, this patch moves it to fat.h, right after MSDOS_SB is defined. I also changed it to an inline function in order to save the double call to MSDOS_SB. This was suggested by joe@perches.com in the previous version. This patch is required for the next in the series, in which the variant (whether this is FAT12, FAT16 or FAT32) checks are replaced with new macros. Link: http://lkml.kernel.org/r/1544990640-11604-3-git-send-email-carmeli.tamir@gmail.com Signed-off-by: Carmeli Tamir <carmeli.tamir@gmail.com> Acked-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Cc: Bart Van Assche <bvanassche@acm.org> Cc: Johannes Thumshirn <jthumshirn@suse.de> Cc: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/fat')
-rw-r--r--fs/fat/fat.h9
-rw-r--r--fs/fat/inode.c2
2 files changed, 10 insertions, 1 deletions
diff --git a/fs/fat/fat.h b/fs/fat/fat.h
index 4e1b2f6df5e6..979bb11832f6 100644
--- a/fs/fat/fat.h
+++ b/fs/fat/fat.h
@@ -142,6 +142,15 @@ static inline struct msdos_sb_info *MSDOS_SB(struct super_block *sb)
return sb->s_fs_info;
}
+/* Maximum number of clusters */
+static inline u32 max_fat(struct super_block *sb)
+{
+ struct msdos_sb_info *sbi = MSDOS_SB(sb);
+
+ return sbi->fat_bits == 32 ? MAX_FAT32 :
+ sbi->fat_bits == 16 ? MAX_FAT16 : MAX_FAT12;
+}
+
static inline struct msdos_inode_info *MSDOS_I(struct inode *inode)
{
return container_of(inode, struct msdos_inode_info, vfs_inode);
diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index 269e7b91b8b1..8d0de1aac4eb 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -1781,7 +1781,7 @@ int fat_fill_super(struct super_block *sb, void *data, int silent, int isvfat,
/* check that FAT table does not overflow */
fat_clusters = calc_fat_clusters(sb);
total_clusters = min(total_clusters, fat_clusters - FAT_START_ENT);
- if (total_clusters > MAX_FAT(sb)) {
+ if (total_clusters > max_fat(sb)) {
if (!silent)
fat_msg(sb, KERN_ERR, "count of clusters too big (%u)",
total_clusters);