GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-06-30 19:06:14 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

Btrfs: Fix sparse endian warnings in struct-funcs.c

Browse source 
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>
This commit is contained in:
Chris Mason 2008-12-02 11:18:37 -05:00
parent 2a7108ad89
commit c99e905c94
1 changed files with 12 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

17
fs/btrfs/struct-funcs.c
View file

@ -36,9 +36,14 @@
* The extent buffer api is used to do all the kmapping and page * The extent buffer api is used to do all the kmapping and page
* spanning work required to get extent buffers in highmem and have * spanning work required to get extent buffers in highmem and have
* a metadata blocksize different from the page size. * 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) \ #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, \ u##bits btrfs_##name(struct extent_buffer *eb, \
type *s) \ type *s) \
{ \ { \
@ -59,14 +64,15 @@ u##bits btrfs_##name(struct extent_buffer *eb, \
int unmap_on_exit = (eb->map_token == NULL); \ int unmap_on_exit = (eb->map_token == NULL); \
unsigned long map_start; \ unsigned long map_start; \
unsigned long map_len; \ unsigned long map_len; \
__le##bits res; \ u##bits res; \
err = map_extent_buffer(eb, offset, \ err = map_extent_buffer(eb, offset, \
sizeof(((type *)0)->member), \ sizeof(((type *)0)->member), \
&map_token, &kaddr, \ &map_token, &kaddr, \
&map_start, &map_len, KM_USER1); \ &map_start, &map_len, KM_USER1); \
if (err) { \ if (err) { \
read_eb_member(eb, s, type, member, &res); \ __le##bits leres; \
return le##bits##_to_cpu(res); \ read_eb_member(eb, s, type, member, &leres); \
return le##bits##_to_cpu(leres); \
} \ } \
p = (type *)(kaddr + part_offset - map_start); \ p = (type *)(kaddr + part_offset - map_start); \
res = le##bits##_to_cpu(p->member); \ res = le##bits##_to_cpu(p->member); \
@ -101,8 +107,9 @@ void btrfs_set_##name(struct extent_buffer *eb, \
&map_token, &kaddr, \ &map_token, &kaddr, \
&map_start, &map_len, KM_USER1); \ &map_start, &map_len, KM_USER1); \
if (err) { \ if (err) { \
val = cpu_to_le##bits(val); \ __le##bits val2; \
write_eb_member(eb, s, type, member, &val); \ val2 = cpu_to_le##bits(val); \
write_eb_member(eb, s, type, member, &val2); \
return; \ return; \
} \ } \
p = (type *)(kaddr + part_offset - map_start); \ p = (type *)(kaddr + part_offset - map_start); \