Signed-off-by: Johannes Thumshirn <jthumsh...@suse.de>
---
 btrfs-sb-mod.c              |  9 ++++++---
 check/main.c                |  2 +-
 cmds/inspect-dump-super.c   |  3 ++-
 cmds/rescue-chunk-recover.c |  2 +-
 convert/common.c            |  3 ++-
 disk-io.c                   | 12 ++++++------
 disk-io.h                   |  2 +-
 file-item.c                 |  2 +-
 8 files changed, 20 insertions(+), 15 deletions(-)

diff --git a/btrfs-sb-mod.c b/btrfs-sb-mod.c
index 16a26f772494..932c2a0432ef 100644
--- a/btrfs-sb-mod.c
+++ b/btrfs-sb-mod.c
@@ -37,7 +37,8 @@ static int check_csum_superblock(void *sb)
        u32 crc = ~(u32)0;
 
        crc = btrfs_csum_data((char *)sb + BTRFS_CSUM_SIZE,
-                               crc, BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE);
+                               (u8 *)&crc,
+                               BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE);
        btrfs_csum_final(crc, result);
 
        return !memcmp(sb, &result, csum_size);
@@ -50,10 +51,12 @@ static void update_block_csum(void *block, int is_sb)
        u32 crc = ~(u32)0;
 
        if (is_sb) {
-               crc = btrfs_csum_data((char *)block + BTRFS_CSUM_SIZE, crc,
+               crc = btrfs_csum_data((char *)block + BTRFS_CSUM_SIZE,
+                                     (u8 *)&crc,
                                BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE);
        } else {
-               crc = btrfs_csum_data((char *)block + BTRFS_CSUM_SIZE, crc,
+               crc = btrfs_csum_data((char *)block + BTRFS_CSUM_SIZE,
+                                     (u8 *)&crc,
                                BLOCKSIZE - BTRFS_CSUM_SIZE);
        }
        btrfs_csum_final(crc, result);
diff --git a/check/main.c b/check/main.c
index 2e16b4e6f05b..0f02c85368ec 100644
--- a/check/main.c
+++ b/check/main.c
@@ -5660,7 +5660,7 @@ static int check_extent_csums(struct btrfs_root *root, 
u64 bytenr,
                                tmp = offset + data_checked;
 
                                csum = btrfs_csum_data((char *)data + tmp,
-                                               csum, fs_info->sectorsize);
+                                               (u8 *)&csum, 
fs_info->sectorsize);
                                btrfs_csum_final(csum, (u8 *)&csum);
 
                                csum_offset = leaf_offset +
diff --git a/cmds/inspect-dump-super.c b/cmds/inspect-dump-super.c
index 65fb3506eac6..96ad3deca3d8 100644
--- a/cmds/inspect-dump-super.c
+++ b/cmds/inspect-dump-super.c
@@ -41,7 +41,8 @@ static int check_csum_sblock(void *sb, int csum_size)
        u32 crc = ~(u32)0;
 
        crc = btrfs_csum_data((char *)sb + BTRFS_CSUM_SIZE,
-                               crc, BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE);
+                               (u8 *)&crc,
+                               BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE);
        btrfs_csum_final(crc, result);
 
        return !memcmp(sb, &result, csum_size);
diff --git a/cmds/rescue-chunk-recover.c b/cmds/rescue-chunk-recover.c
index c2a26ad040ee..37c024ed8965 100644
--- a/cmds/rescue-chunk-recover.c
+++ b/cmds/rescue-chunk-recover.c
@@ -1902,7 +1902,7 @@ static int check_one_csum(int fd, u64 start, u32 len, u32 
tree_csum)
                goto out;
        }
        ret = 0;
-       csum_result = btrfs_csum_data(data, csum_result, len);
+       csum_result = btrfs_csum_data(data, (u8 *)&csum_result, len);
        btrfs_csum_final(csum_result, (u8 *)&csum_result);
        if (csum_result != tree_csum)
                ret = 1;
diff --git a/convert/common.c b/convert/common.c
index f8bbb23cba89..ab8e6b9f4749 100644
--- a/convert/common.c
+++ b/convert/common.c
@@ -65,7 +65,8 @@ static inline int write_temp_super(int fd, struct 
btrfs_super_block *sb,
        u32 crc = ~(u32)0;
        int ret;
 
-       crc = btrfs_csum_data((char *)sb + BTRFS_CSUM_SIZE, crc,
+       crc = btrfs_csum_data((char *)sb + BTRFS_CSUM_SIZE,
+                            (u8 *)&crc,
                              BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE);
        btrfs_csum_final(crc, &sb->csum[0]);
        ret = pwrite(fd, sb, BTRFS_SUPER_INFO_SIZE, sb_bytenr);
diff --git a/disk-io.c b/disk-io.c
index a4995a628210..a0c37c569d58 100644
--- a/disk-io.c
+++ b/disk-io.c
@@ -138,9 +138,9 @@ static void print_tree_block_error(struct btrfs_fs_info 
*fs_info,
        }
 }
 
-u32 btrfs_csum_data(char *data, u32 seed, size_t len)
+u32 btrfs_csum_data(char *data, u8 *seed, size_t len)
 {
-       return crc32c(seed, data, len);
+       return crc32c(*(u32*)seed, data, len);
 }
 
 void btrfs_csum_final(u32 crc, u8 *result)
@@ -156,7 +156,7 @@ static int __csum_tree_block_size(struct extent_buffer 
*buf, u16 csum_size,
        u32 crc = ~(u32)0;
 
        len = buf->len - BTRFS_CSUM_SIZE;
-       crc = btrfs_csum_data(buf->data + BTRFS_CSUM_SIZE, crc, len);
+       crc = btrfs_csum_data(buf->data + BTRFS_CSUM_SIZE, (u8 *)&crc, len);
        btrfs_csum_final(crc, result);
 
        if (verify) {
@@ -1376,7 +1376,7 @@ int btrfs_check_super(struct btrfs_super_block *sb, 
unsigned sbflags)
        csum_size = btrfs_csum_sizes[csum_type];
 
        crc = ~(u32)0;
-       crc = btrfs_csum_data((char *)sb + BTRFS_CSUM_SIZE, crc,
+       crc = btrfs_csum_data((char *)sb + BTRFS_CSUM_SIZE, (u8 *)&crc,
                              BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE);
        btrfs_csum_final(crc, result);
 
@@ -1631,7 +1631,7 @@ static int write_dev_supers(struct btrfs_fs_info *fs_info,
        if (fs_info->super_bytenr != BTRFS_SUPER_INFO_OFFSET) {
                btrfs_set_super_bytenr(sb, fs_info->super_bytenr);
                crc = ~(u32)0;
-               crc = btrfs_csum_data((char *)sb + BTRFS_CSUM_SIZE, crc,
+               crc = btrfs_csum_data((char *)sb + BTRFS_CSUM_SIZE, (u8 *)&crc,
                                      BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE);
                btrfs_csum_final(crc, &sb->csum[0]);
 
@@ -1667,7 +1667,7 @@ static int write_dev_supers(struct btrfs_fs_info *fs_info,
                btrfs_set_super_bytenr(sb, bytenr);
 
                crc = ~(u32)0;
-               crc = btrfs_csum_data((char *)sb + BTRFS_CSUM_SIZE, crc,
+               crc = btrfs_csum_data((char *)sb + BTRFS_CSUM_SIZE, (u8 *)&crc,
                                      BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE);
                btrfs_csum_final(crc, &sb->csum[0]);
 
diff --git a/disk-io.h b/disk-io.h
index 394997ad72cb..92c87f28f8b2 100644
--- a/disk-io.h
+++ b/disk-io.h
@@ -186,7 +186,7 @@ int btrfs_free_fs_root(struct btrfs_root *root);
 void btrfs_mark_buffer_dirty(struct extent_buffer *buf);
 int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid);
 int btrfs_set_buffer_uptodate(struct extent_buffer *buf);
-u32 btrfs_csum_data(char *data, u32 seed, size_t len);
+u32 btrfs_csum_data(char *data, u8 *seed, size_t len);
 void btrfs_csum_final(u32 crc, u8 *result);
 
 int btrfs_open_device(struct btrfs_device *dev);
diff --git a/file-item.c b/file-item.c
index 3bf48c68913d..5f6548e9a74f 100644
--- a/file-item.c
+++ b/file-item.c
@@ -312,7 +312,7 @@ csum:
        item = (struct btrfs_csum_item *)((unsigned char *)item +
                                          csum_offset * csum_size);
 found:
-       csum_result = btrfs_csum_data(data, csum_result, len);
+       csum_result = btrfs_csum_data(data, (u8 *)&csum_result, len);
        btrfs_csum_final(csum_result, (u8 *)&csum_result);
        if (csum_result == 0) {
                printk("csum result is 0 for block %llu\n",
-- 
2.16.4

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