need helpp ?

CC drivers/staging/android/lowmemorykiller.o
/home/mr/RR/kernel/samsung/exynos7580/drivers/staging/android/lowmemorykiller.c:48:37: fatal error: linux/show_mem_notifier.h: No such file or directory
#include <linux/show_mem_notifier.h>
^
compilation terminated.
/home/mr/RR/kernel/samsung/exynos7580/scripts/Makefile.build:308: recipe for target 'drivers/staging/android/lowmemorykiller.o' failed
make[5]: *** [drivers/staging/android/lowmemorykiller.o] Error 1
/home/mr/RR/kernel/samsung/exynos7580/scripts/Makefile.build:455: recipe for target 'drivers/staging/android' failed
make[4]: *** [drivers/staging/android] Error 2
/home/mr/RR/kernel/samsung/exynos7580/scripts/Makefile.build:455: recipe for target 'drivers/staging' failed
make[3]: *** [drivers/staging] Error 2
/home/mr/RR/kernel/samsung/exynos7580/Makefile:806: recipe for target 'drivers' failed
make[2]: *** [drivers] Error 2
Makefile:130: recipe for target 'sub-make' failed
make[1]: *** [sub-make] Error 2
make[1]: Leaving directory '/home/mr/RR/kernel/samsung/exynos7580'
build/core/tasks/kernel.mk:286: recipe for target 'TARGET_KERNEL_BINARIES' failed
make: *** [TARGET_KERNEL_BINARIES] Error 2
make: *** Waiting for unfinished jobs....

#### make failed to build some targets (20:04 (mm:ss)) ####


getting this while compiling rr source

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