Currently in do_fat_read() when reading FAT sectors, we have to divide down LINEAR_PREFETCH_SIZE by the sector size, whereas it's defined as 2 sectors worth of bytes. In order to avoid redundant multiplication/division, introduce #define PREFETCH_BLOCKS instead of #define LINEAR_PREFETCH_SIZE. Signed-off-by: Sergei Shtylyov <sshtylyov@mvista.com>master
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