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authorHarvey Harrison <harvey.harrison@gmail.com>2008-10-15 22:04:03 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-10-16 11:21:46 -0700
commit152b95a1ed499075006cc6552ef49407deeb815b (patch)
treed77fdf0382669cd541ebb5c723d4e0757cc52e18 /fs/befs
parentbd39597cbd42a784105a04010100e27267481c67 (diff)
downloadlinux-152b95a1ed499075006cc6552ef49407deeb815b.tar.gz
befs: annotate fs32 on tests for superblock endianness
Does compile-time byteswapping rather than runtime. Noticed by sparse: fs/befs/super.c:29:6: warning: cast to restricted __le32 fs/befs/super.c:29:6: warning: cast from restricted fs32 fs/befs/super.c:31:11: warning: cast to restricted __be32 fs/befs/super.c:31:11: warning: cast from restricted fs32 fs/befs/super.c:31:11: warning: cast to restricted __be32 fs/befs/super.c:31:11: warning: cast from restricted fs32 fs/befs/super.c:31:11: warning: cast to restricted __be32 fs/befs/super.c:31:11: warning: cast from restricted fs32 fs/befs/super.c:31:11: warning: cast to restricted __be32 fs/befs/super.c:31:11: warning: cast from restricted fs32 fs/befs/super.c:31:11: warning: cast to restricted __be32 fs/befs/super.c:31:11: warning: cast from restricted fs32 fs/befs/super.c:31:11: warning: cast to restricted __be32 fs/befs/super.c:31:11: warning: cast from restricted fs32 fs/befs/linuxvfs.c:811:7: warning: cast to restricted __le32 fs/befs/linuxvfs.c:811:7: warning: cast from restricted fs32 fs/befs/linuxvfs.c:812:7: warning: cast to restricted __be32 fs/befs/linuxvfs.c:812:7: warning: cast from restricted fs32 fs/befs/linuxvfs.c:812:7: warning: cast to restricted __be32 fs/befs/linuxvfs.c:812:7: warning: cast from restricted fs32 fs/befs/linuxvfs.c:812:7: warning: cast to restricted __be32 fs/befs/linuxvfs.c:812:7: warning: cast from restricted fs32 fs/befs/linuxvfs.c:812:7: warning: cast to restricted __be32 fs/befs/linuxvfs.c:812:7: warning: cast from restricted fs32 fs/befs/linuxvfs.c:812:7: warning: cast to restricted __be32 fs/befs/linuxvfs.c:812:7: warning: cast from restricted fs32 fs/befs/linuxvfs.c:812:7: warning: cast to restricted __be32 fs/befs/linuxvfs.c:812:7: warning: cast from restricted fs32 Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Cc: "Sergey S. Kostyliov" <rathamahata@php4.ru> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/befs')
-rw-r--r--fs/befs/befs_fs_types.h4
-rw-r--r--fs/befs/linuxvfs.c4
-rw-r--r--fs/befs/super.c6
3 files changed, 9 insertions, 5 deletions
diff --git a/fs/befs/befs_fs_types.h b/fs/befs/befs_fs_types.h
index e2595c2c403..7893eaa1e58 100644
--- a/fs/befs/befs_fs_types.h
+++ b/fs/befs/befs_fs_types.h
@@ -55,8 +55,12 @@ enum super_flags {
};
#define BEFS_BYTEORDER_NATIVE 0x42494745
+#define BEFS_BYTEORDER_NATIVE_LE (__force fs32)cpu_to_le32(BEFS_BYTEORDER_NATIVE)
+#define BEFS_BYTEORDER_NATIVE_BE (__force fs32)cpu_to_be32(BEFS_BYTEORDER_NATIVE)
#define BEFS_SUPER_MAGIC BEFS_SUPER_MAGIC1
+#define BEFS_SUPER_MAGIC1_LE (__force fs32)cpu_to_le32(BEFS_SUPER_MAGIC1)
+#define BEFS_SUPER_MAGIC1_BE (__force fs32)cpu_to_be32(BEFS_SUPER_MAGIC1)
/*
* Flags of inode
diff --git a/fs/befs/linuxvfs.c b/fs/befs/linuxvfs.c
index 9286b2af893..b6dfee37c7b 100644
--- a/fs/befs/linuxvfs.c
+++ b/fs/befs/linuxvfs.c
@@ -809,8 +809,8 @@ befs_fill_super(struct super_block *sb, void *data, int silent)
/* account for offset of super block on x86 */
disk_sb = (befs_super_block *) bh->b_data;
- if ((le32_to_cpu(disk_sb->magic1) == BEFS_SUPER_MAGIC1) ||
- (be32_to_cpu(disk_sb->magic1) == BEFS_SUPER_MAGIC1)) {
+ if ((disk_sb->magic1 == BEFS_SUPER_MAGIC1_LE) ||
+ (disk_sb->magic1 == BEFS_SUPER_MAGIC1_BE)) {
befs_debug(sb, "Using PPC superblock location");
} else {
befs_debug(sb, "Using x86 superblock location");
diff --git a/fs/befs/super.c b/fs/befs/super.c
index 8c3401ff6d6..41f2b4d0093 100644
--- a/fs/befs/super.c
+++ b/fs/befs/super.c
@@ -26,10 +26,10 @@ befs_load_sb(struct super_block *sb, befs_super_block * disk_sb)
befs_sb_info *befs_sb = BEFS_SB(sb);
/* Check the byte order of the filesystem */
- if (le32_to_cpu(disk_sb->fs_byte_order) == BEFS_BYTEORDER_NATIVE)
+ if (disk_sb->fs_byte_order == BEFS_BYTEORDER_NATIVE_LE)
befs_sb->byte_order = BEFS_BYTESEX_LE;
- else if (be32_to_cpu(disk_sb->fs_byte_order) == BEFS_BYTEORDER_NATIVE)
- befs_sb->byte_order = BEFS_BYTESEX_BE;
+ else if (disk_sb->fs_byte_order == BEFS_BYTEORDER_NATIVE_BE)
+ befs_sb->byte_order = BEFS_BYTESEX_BE;
befs_sb->magic1 = fs32_to_cpu(sb, disk_sb->magic1);
befs_sb->magic2 = fs32_to_cpu(sb, disk_sb->magic2);