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dm snapshot: use unsigned integer chunk size

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Use unsigned integer chunk size.

Maximum chunk size is 512kB, there won't ever be need to use 4GB chunk size,
so the number can be 32-bit. This fixes compiler failure on 32-bit systems
with large block devices.

Cc: stable@kernel.org
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Reviewed-by: Jonathan Brassow <jbrassow@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
This commit is contained in:
Mikulas Patocka
2009-10-16 23:18:17 +01:00
committed by Alasdair G Kergon
parent 4c6fff445d
commit df96eee679
4 changed files with 25 additions and 23 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/md/dm-snap-persistent.c
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@ -284,12 +284,13 @@ static int read_header(struct pstore *ps, int *new_snapshot)
{
int r;
struct disk_header *dh;
chunk_t chunk_size;
unsigned chunk_size;
int chunk_size_supplied = 1;
char *chunk_err;
/*
* Use default chunk size (or hardsect_size, if larger) if none supplied
* Use default chunk size (or logical_block_size, if larger)
* if none supplied
*/
if (!ps->store->chunk_size) {
ps->store->chunk_size = max(DM_CHUNK_SIZE_DEFAULT_SECTORS,
@ -334,10 +335,9 @@ static int read_header(struct pstore *ps, int *new_snapshot)
return 0;
if (chunk_size_supplied)
DMWARN("chunk size %llu in device metadata overrides "
"table chunk size of %llu.",
(unsigned long long)chunk_size,
(unsigned long long)ps->store->chunk_size);
DMWARN("chunk size %u in device metadata overrides "
"table chunk size of %u.",
chunk_size, ps->store->chunk_size);
/* We had a bogus chunk_size. Fix stuff up. */
free_area(ps);
@ -345,8 +345,8 @@ static int read_header(struct pstore *ps, int *new_snapshot)
r = dm_exception_store_set_chunk_size(ps->store, chunk_size,
&chunk_err);
if (r) {
DMERR("invalid on-disk chunk size %llu: %s.",
(unsigned long long)chunk_size, chunk_err);
DMERR("invalid on-disk chunk size %u: %s.",
chunk_size, chunk_err);
return r;
}