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ext4: code cleanup in mb_find_buddy()
Current code calculate max no matter whether order is zero, it's unnecessary. This cleanup patch sets max to "1 << (e4b->bd_blkbits + 3)" only when order == 0. Signed-off-by: Coly Li <bosong.ly@taobao.com> Cc: Alex Tomas <alex@clusterfs.com> Cc: Theodore Tso <tytso@google.com>
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@ -432,9 +432,10 @@ static void *mb_find_buddy(struct ext4_buddy *e4b, int order, int *max)
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}
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}
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/* at order 0 we see each particular block */
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/* at order 0 we see each particular block */
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*max = 1 << (e4b->bd_blkbits + 3);
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if (order == 0) {
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if (order == 0)
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*max = 1 << (e4b->bd_blkbits + 3);
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return EXT4_MB_BITMAP(e4b);
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return EXT4_MB_BITMAP(e4b);
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}
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bb = EXT4_MB_BUDDY(e4b) + EXT4_SB(e4b->bd_sb)->s_mb_offsets[order];
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bb = EXT4_MB_BUDDY(e4b) + EXT4_SB(e4b->bd_sb)->s_mb_offsets[order];
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*max = EXT4_SB(e4b->bd_sb)->s_mb_maxs[order];
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*max = EXT4_SB(e4b->bd_sb)->s_mb_maxs[order];
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