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| author | Hugh Dickins <hugh.dickins@tiscali.co.uk> | 2009-12-14 17:58:45 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-12-15 08:53:15 -0800 |
| commit | 8d69aaee80c123b460918816cbfa2e83224c3646 (patch) | |
| tree | 899a69417dbd81f9b53926d7076629cc9b394ae5 /include/linux/swap.h | |
| parent | 253d553ba75ab26b3e9e2f70cbf6fbf0813f7e86 (diff) | |
| download | lwn-8d69aaee80c123b460918816cbfa2e83224c3646.tar.gz lwn-8d69aaee80c123b460918816cbfa2e83224c3646.zip | |
swap_info: swap_map of chars not shorts
Halve the vmalloc'ed swap_map array from unsigned shorts to unsigned
chars: it's still very unusual to reach a swap count of 126, and the
next patch allows it to be extended indefinitely.
Signed-off-by: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Rik van Riel <riel@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/swap.h')
| -rw-r--r-- | include/linux/swap.h | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/include/linux/swap.h b/include/linux/swap.h index c9d8870892b8..f733deb10748 100644 --- a/include/linux/swap.h +++ b/include/linux/swap.h @@ -151,9 +151,9 @@ enum { #define SWAP_CLUSTER_MAX 32 -#define SWAP_MAP_MAX 0x7ffe -#define SWAP_MAP_BAD 0x7fff -#define SWAP_HAS_CACHE 0x8000 /* There is a swap cache of entry. */ +#define SWAP_MAP_MAX 0x7e +#define SWAP_MAP_BAD 0x7f +#define SWAP_HAS_CACHE 0x80 /* There is a swap cache of entry. */ /* * The in-memory structure used to track swap areas. @@ -167,7 +167,7 @@ struct swap_info_struct { struct block_device *bdev; struct swap_extent first_swap_extent; struct swap_extent *curr_swap_extent; - unsigned short *swap_map; + unsigned char *swap_map; unsigned int lowest_bit; unsigned int highest_bit; unsigned int lowest_alloc; /* while preparing discard cluster */ |