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ext4: use unlikely to improve the efficiency of the kernel
authorWang Shilong <wangsl-fnst@cn.fujitsu.com>
Sat, 12 Jan 2013 21:28:47 +0000 (16:28 -0500)
committerTheodore Ts'o <tytso@mit.edu>
Sat, 12 Jan 2013 21:28:47 +0000 (16:28 -0500)
Because the function 'sb_getblk' seldomly fails to return NULL
value,it will be better to use 'unlikely' to optimize it.

Signed-off-by: Wang Shilong <wangsl-fnst@cn.fujitsu.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

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