From: Anshuman Khandual <anshuman.khandual@xxxxxxx>
Subject: mm/memremap: drop unused SECTION_SIZE and SECTION_MASK
SECTION_SIZE and SECTION_MASK macros are not getting used anymore. But they
do conflict with existing definitions on arm64 platform causing following
warning during build. Lets drop these unused macros.
mm/memremap.c:16: warning: "SECTION_MASK" redefined
#define SECTION_MASK ~((1UL << PA_SECTION_SHIFT) - 1)
In file included from ./arch/arm64/include/asm/processor.h:34,
from ./include/linux/mutex.h:19,
from ./include/linux/kernfs.h:12,
from ./include/linux/sysfs.h:16,
from ./include/linux/kobject.h:20,
from ./include/linux/device.h:16,
from mm/memremap.c:3:
./arch/arm64/include/asm/pgtable-hwdef.h:79: note: this is the location of
the previous definition
#define SECTION_MASK (~(SECTION_SIZE-1))
mm/memremap.c:17: warning: "SECTION_SIZE" redefined
#define SECTION_SIZE (1UL << PA_SECTION_SHIFT)
In file included from ./arch/arm64/include/asm/processor.h:34,
from ./include/linux/mutex.h:19,
from ./include/linux/kernfs.h:12,
from ./include/linux/sysfs.h:16,
from ./include/linux/kobject.h:20,
from ./include/linux/device.h:16,
from mm/memremap.c:3:
./arch/arm64/include/asm/pgtable-hwdef.h:78: note: this is the location of
the previous definition
#define SECTION_SIZE (_AC(1, UL) << SECTION_SHIFT)
Link: http://lkml.kernel.org/r/1569312010-31313-1-git-send-email-anshuman.khandual@xxxxxxx
Signed-off-by: Anshuman Khandual <anshuman.khandual@xxxxxxx>
Reported-by: kbuild test robot <lkp@xxxxxxxxx>
Reviewed-by: David Hildenbrand <david@xxxxxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: Jason Gunthorpe <jgg@xxxxxxxx>
Cc: Logan Gunthorpe <logang@xxxxxxxxxxxx>
Cc: Ira Weiny <ira.weiny@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memremap.c | 2 --
1 file changed, 2 deletions(-)
--- a/mm/memremap.c~mm-memremap-drop-unused-section_size-and-section_mask
+++ a/mm/memremap.c
@@ -13,8 +13,6 @@
#include <linux/xarray.h>
static DEFINE_XARRAY(pgmap_array);
-#define SECTION_MASK ~((1UL << PA_SECTION_SHIFT) - 1)
-#define SECTION_SIZE (1UL << PA_SECTION_SHIFT)
#ifdef CONFIG_DEV_PAGEMAP_OPS
DEFINE_STATIC_KEY_FALSE(devmap_managed_key);
_
