Build kernel error - Xiaomi Redmi Note 3 Questions & Answers

Hi guys i want make a kernel but when i compile, by an error :
CHK include/generated/uapi/linux/version.h
CHK include/generated/utsrelease.h
CALL scripts/checksyscalls.sh
CC scripts/mod/devicetable-offsets.s
GEN scripts/mod/devicetable-offsets.h
HOSTCC scripts/mod/file2alias.o
HOSTLD scripts/mod/modpost
CHK include/generated/compile.h
CHK kernel/config_data.h
CC mm/page_alloc.o
mm/page_alloc.c: In function '__rmqueue_cma':
mm/page_alloc.c:1162:12: error: 'struct zone' has no member named 'cma_alloc'
if (!zone->cma_alloc = 0)
^
mm/page_alloc.c:1163:43: error: 'MIGRATE_CMA' undeclared (first use in this function)
page = __rmqueue_smallest(zone, order, MIGRATE_CMA);
^
mm/page_alloc.c:1163:43: note: each undeclared identifier is reported only once for each function it appears in
scripts/Makefile.build:308: recipe for target 'mm/page_alloc.o' failed
make[1]: *** [mm/page_alloc.o] Error 1
Makefile:825: recipe for target 'mm' failed
make: *** [mm] Error 2
in the file source the fuction __rmqueue_cma is :
static struct page *__rmqueue_cma(struct zone *zone, unsigned int order)
{
struct page *page = 0;
if (IS_ENABLED(CONFIG_CMA))
if (!zone->cma_alloc)
page = __rmqueue_smallest(zone, order, MIGRATE_CMA);
return page;
}
why ?My command to build is:
export ARCH=arm64
export SUBARCH=arm64
export CROSS_COMPILE= "mypwd"/toolchain64/bin/aarch64-linux-android-
Help my please

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