Include linux/export.h to fix below build warning:
CC arch/arm/mach-pxa/balloon3.o
arch/arm/mach-pxa/balloon3.c:85: warning: data definition has no type or storage class
arch/arm/mach-pxa/balloon3.c:85: warning: type defaults to 'int' in declaration of 'EXPORT_SYMBOL_GPL'
arch/arm/mach-pxa/balloon3.c:85: warning: parameter names (without types) in function declaration
Signed-off-by: Axel Lin <axel.lin@gmail.com> Acked-by: Haojian Zhuang <haojian.zhuang@gmail.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>