On Mon, 21 Dec 2020 09:05:51 -0800 Roman Gushchin <guro@xxxxxx> wrote:
> Subject: [PATCH v3 1/2] mm: cma: allocate cma areas bottom-up
i386 allmodconfig:
In file included from ./include/vdso/const.h:5,
from ./include/linux/const.h:4,
from ./include/linux/bits.h:5,
from ./include/linux/bitops.h:6,
from ./include/linux/kernel.h:11,
from ./include/asm-generic/bug.h:20,
from ./arch/x86/include/asm/bug.h:93,
from ./include/linux/bug.h:5,
from ./include/linux/mmdebug.h:5,
from ./include/linux/mm.h:9,
from ./include/linux/memblock.h:13,
from mm/cma.c:24:
mm/cma.c: In function ‘cma_declare_contiguous_nid’:
./include/uapi/linux/const.h:20:19: warning: conversion from ‘long long unsigned int’ to ‘phys_addr_t’ {aka ‘unsigned int’} changes value from ‘4294967296’ to ‘0’ [-Woverflow]
#define __AC(X,Y) (X##Y)
^~~~~~
./include/uapi/linux/const.h:21:18: note: in expansion of macro ‘__AC’
#define _AC(X,Y) __AC(X,Y)
^~~~
./include/linux/sizes.h:46:18: note: in expansion of macro ‘_AC’
#define SZ_4G _AC(0x100000000, ULL)
^~~
mm/cma.c:349:53: note: in expansion of macro ‘SZ_4G’
addr = memblock_alloc_range_nid(size, alignment, SZ_4G,
^~~~~
