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.)