Fix syntax error when compiling for kernel versions <= 2.6.38

Signed-off-by: zwliew <zhaoweiliew@gmail.com>
include linux/slab.h (if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,38))

Signed-off-by: zwliew <zhaoweiliew@gmail.com>
Fixed support for kernel >= 3.5

Signed-off-by: zwliew <zhaoweiliew@gmail.com>
Modified email address

Signed-off-by: zwliew <zhaoweiliew@gmail.com>
Added missing bracket

Signed-off-by: zwliew <zhaoweiliew@gmail.com>