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| author | Chris Mason <chris.mason@oracle.com> | 2008-12-02 11:18:37 -0500 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2008-12-02 11:18:37 -0500 |
| commit | c99e905c945c462085c6d64646dc5af0c0a16815 (patch) | |
| tree | 3aed8630c0778c4a8b26a5d8eb2fba42fbb5e26c | |
| parent | 2a7108ad89e1ea9a30afbbece8b581a0532afd12 (diff) | |
Btrfs: Fix sparse endian warnings in struct-funcs.c
The btrfs macros to access individual struct members on disk were
sending the same variable to functions that expected different types
of endianness. This fix explicitly creates a variable of the correct
type instead of abusing a single variable for mixed purposes.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
| -rw-r--r-- | fs/btrfs/struct-funcs.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/fs/btrfs/struct-funcs.c b/fs/btrfs/struct-funcs.c index cdedbe144d4..8d7f568009c 100644 --- a/fs/btrfs/struct-funcs.c +++ b/fs/btrfs/struct-funcs.c @@ -36,9 +36,14 @@ * The extent buffer api is used to do all the kmapping and page * spanning work required to get extent buffers in highmem and have * a metadata blocksize different from the page size. + * + * The macro starts with a simple function prototype declaration so that + * sparse won't complain about it being static. */ #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ +u##bits btrfs_##name(struct extent_buffer *eb, type *s); \ +void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val); \ u##bits btrfs_##name(struct extent_buffer *eb, \ type *s) \ { \ @@ -59,14 +64,15 @@ u##bits btrfs_##name(struct extent_buffer *eb, \ int unmap_on_exit = (eb->map_token == NULL); \ unsigned long map_start; \ unsigned long map_len; \ - __le##bits res; \ + u##bits res; \ err = map_extent_buffer(eb, offset, \ sizeof(((type *)0)->member), \ &map_token, &kaddr, \ &map_start, &map_len, KM_USER1); \ if (err) { \ - read_eb_member(eb, s, type, member, &res); \ - return le##bits##_to_cpu(res); \ + __le##bits leres; \ + read_eb_member(eb, s, type, member, &leres); \ + return le##bits##_to_cpu(leres); \ } \ p = (type *)(kaddr + part_offset - map_start); \ res = le##bits##_to_cpu(p->member); \ @@ -101,8 +107,9 @@ void btrfs_set_##name(struct extent_buffer *eb, \ &map_token, &kaddr, \ &map_start, &map_len, KM_USER1); \ if (err) { \ - val = cpu_to_le##bits(val); \ - write_eb_member(eb, s, type, member, &val); \ + __le##bits val2; \ + val2 = cpu_to_le##bits(val); \ + write_eb_member(eb, s, type, member, &val2); \ return; \ } \ p = (type *)(kaddr + part_offset - map_start); \ |