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Subject[PATCH 6/7] um: switch to NO_BOOTMEM
Date
Replace bootmem initialization with memblock_add and memblock_reserve calls
and explicit initialization of {min,max}_low_pfn.

Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Acked-by: Richard Weinberger <richard@nod.at>
---
arch/um/Kconfig.common | 2 ++
arch/um/kernel/physmem.c | 20 +++++++++-----------
2 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/arch/um/Kconfig.common b/arch/um/Kconfig.common
index 07f84c8..1487957 100644
--- a/arch/um/Kconfig.common
+++ b/arch/um/Kconfig.common
@@ -8,6 +8,8 @@ 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
diff --git a/arch/um/kernel/physmem.c b/arch/um/kernel/physmem.c
index 0eaec0e..296a91a 100644
--- a/arch/um/kernel/physmem.c
+++ b/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 start, unsigned long reserve_end,
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 start, unsigned long reserve_end,
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)
--
2.7.4
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