The patch titled
Subject: um: switch to NO_BOOTMEM
has been added to the -mm tree. Its filename is
um-switch-to-no_bootmem.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/um-switch-to-no_bootmem.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/um-switch-to-no_bootmem.patch
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*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Mike Rapoport <rppt@xxxxxxxxxxxxxxxxxx>
Subject: um: switch to NO_BOOTMEM
Replace bootmem initialization with memblock_add and memblock_reserve calls
and explicit initialization of {min,max}_low_pfn.
Link: http://lkml.kernel.org/r/1533326330-31677-7-git-send-email-rppt@xxxxxxxxxxxxxxxxxx
Signed-off-by: Mike Rapoport <rppt@xxxxxxxxxxxxxxxxxx>
Acked-by: Richard Weinberger <richard@xxxxxx>
Cc: Guan Xuetao <gxt@xxxxxxxxxx>
Cc: Ley Foon Tan <ley.foon.tan@xxxxxxxxx>
Cc: Richard Kuo <rkuo@xxxxxxxxxxxxxx>
Cc: Rob Herring <robh@xxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/um/Kconfig | 2 ++
arch/um/kernel/physmem.c | 20 +++++++++-----------
2 files changed, 11 insertions(+), 11 deletions(-)
--- a/arch/um/Kconfig~um-switch-to-no_bootmem
+++ a/arch/um/Kconfig
@@ -12,6 +12,8 @@ config UML
select HAVE_UID16
select HAVE_FUTEX_CMPXCHG if FUTEX
select HAVE_DEBUG_KMEMLEAK
+ select HAVE_MEMBLOCK
+ select NO_BOOTMEM
select GENERIC_IRQ_SHOW
select GENERIC_CPU_DEVICES
select GENERIC_CLOCKEVENTS
--- a/arch/um/kernel/physmem.c~um-switch-to-no_bootmem
+++ a/arch/um/kernel/physmem.c
@@ -5,6 +5,7 @@
#include <linux/module.h>
#include <linux/bootmem.h>
+#include <linux/memblock.h>
#include <linux/mm.h>
#include <linux/pfn.h>
#include <asm/page.h>
@@ -80,23 +81,18 @@ void __init setup_physmem(unsigned long
unsigned long len, unsigned long long highmem)
{
unsigned long reserve = reserve_end - start;
- unsigned long pfn = PFN_UP(__pa(reserve_end));
- unsigned long delta = (len - reserve) >> PAGE_SHIFT;
- unsigned long offset, bootmap_size;
- long map_size;
+ long map_size = len - reserve;
int err;
- offset = reserve_end - start;
- map_size = len - offset;
if(map_size <= 0) {
os_warn("Too few physical memory! Needed=%lu, given=%lu\n",
- offset, len);
+ reserve, len);
exit(1);
}
physmem_fd = create_mem_file(len + highmem);
- err = os_map_memory((void *) reserve_end, physmem_fd, offset,
+ err = os_map_memory((void *) reserve_end, physmem_fd, reserve,
map_size, 1, 1, 1);
if (err < 0) {
os_warn("setup_physmem - mapping %ld bytes of memory at 0x%p "
@@ -113,9 +109,11 @@ void __init setup_physmem(unsigned long
os_write_file(physmem_fd, __syscall_stub_start, PAGE_SIZE);
os_fsync_file(physmem_fd);
- bootmap_size = init_bootmem(pfn, pfn + delta);
- free_bootmem(__pa(reserve_end) + bootmap_size,
- len - bootmap_size - reserve);
+ memblock_add(__pa(start), len + highmem);
+ memblock_reserve(__pa(start), reserve);
+
+ min_low_pfn = PFN_UP(__pa(reserve_end));
+ max_low_pfn = min_low_pfn + (map_size >> PAGE_SHIFT);
}
int phys_mapping(unsigned long phys, unsigned long long *offset_out)
_
Patches currently in -mm which might be from rppt@xxxxxxxxxxxxxxxxxx are
hexagon-switch-to-no_bootmem.patch
of-ignore-sub-page-memory-regions.patch
nios2-use-generic-early_init_dt_add_memory_arch.patch
nios2-switch-to-no_bootmem.patch
um-setup_physmem-stop-using-global-variables.patch
um-switch-to-no_bootmem.patch
unicore32-switch-to-no_bootmem.patch
