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btrfs: fix min csum item size warnings in 32bit 

commit 7ca4be45a0 limited csum items to
PAGE_CACHE_SIZE.  It used min() with incompatible types in 32bit which
generates warnings:

fs/btrfs/file-item.c: In function ‘btrfs_csum_file_blocks’:
fs/btrfs/file-item.c:717: warning: comparison of distinct pointer types lacks a cast

This uses min_t(u32,) to fix the warnings.  u32 seemed reasonable
because btrfs_root->leafsize is u32 and PAGE_CACHE_SIZE is unsigned
long.

Signed-off-by: Zach Brown <zab@zabbo.net>
This commit is contained in:
Zach Brown 2012-09-20 14:33:00 -06:00 committed by Chris Mason
parent 67b0fd63d5
commit 221b831835
1 changed files with 2 additions and 1 deletions
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3
fs/btrfs/file-item.c
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@ -29,7 +29,8 @@
sizeof(struct btrfs_item) * 2) / \
size) - 1))
#define MAX_CSUM_ITEMS(r, size) (min(__MAX_CSUM_ITEMS(r, size), PAGE_CACHE_SIZE))
#define MAX_CSUM_ITEMS(r, size) (min_t(u32, __MAX_CSUM_ITEMS(r, size), \
PAGE_CACHE_SIZE))
#define MAX_ORDERED_SUM_BYTES(r) ((PAGE_SIZE - \
sizeof(struct btrfs_ordered_sum)) / \