CC kernel/power/snapshot.o
kernel/power/snapshot.c:669: error: redefinition of swsusp_set_page_free
include/linux/suspend.h:75: error: previous definition of swsusp_set_page_free was here
kernel/power/snapshot.c:681: error: redefinition of swsusp_unset_page_free
include/linux/suspend.h:76: error: previous definition of swsusp_unset_page_free was here
kernel/power/snapshot.c:693: error: redefinition of swsusp_page_is_forbidden
include/linux/suspend.h:74: error: previous definition of swsusp_page_is_forbidden was here
kernel/power/snapshot.c: In function enough_free_mem:
kernel/power/snapshot.c:1102: error: PAGES_FOR_IO undeclared (first use in this function)
kernel/power/snapshot.c:1102: error: (Each undeclared identifier is reported only once
kernel/power/snapshot.c:1102: error: for each function it appears in.)