Use it to get mem size under the limit_pfn.
to replace local version in x86 reserved_initrd.
-v2: remove not needed cast that is pointed out by HPA.
Signed-off-by: Yinghai Lu <ying...@kernel.org>
---
arch/x86/kernel/setup.c | 16 +---------------
include/linux/memblock.h | 1 +
mm/memblock.c | 17 +++++++++++++++++
3 files changed, 19 insertions(+), 15 deletions(-)
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 398ec0c..1f1c68f 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -363,20 +363,6 @@ static void __init relocate_initrd(void)
ramdisk_here, ramdisk_here + ramdisk_size - 1);
}
-static u64 __init get_mem_size(unsigned long limit_pfn)
-{
- int i;
- u64 mapped_pages = 0;
- unsigned long start_pfn, end_pfn;
-
- for_each_mem_pfn_range(i, MAX_NUMNODES, &start_pfn, &end_pfn, NULL) {
- start_pfn = min_t(unsigned long, start_pfn, limit_pfn);
- end_pfn = min_t(unsigned long, end_pfn, limit_pfn);
- mapped_pages += end_pfn - start_pfn;
- }
-
- return mapped_pages << PAGE_SHIFT;
-}
static void __init early_reserve_initrd(void)
{
/* Assume only end is not page aligned */
@@ -404,7 +390,7 @@ static void __init reserve_initrd(void)
initrd_start = 0;
- mapped_size = get_mem_size(max_pfn_mapped);
+ mapped_size = memblock_mem_size(max_pfn_mapped);
if (ramdisk_size >= (mapped_size>>1))
panic("initrd too large to handle, "
"disabling initrd (%lld needed, %lld available)\n",
diff --git a/include/linux/memblock.h b/include/linux/memblock.h
index d452ee1..f388203 100644
--- a/include/linux/memblock.h
+++ b/include/linux/memblock.h
@@ -155,6 +155,7 @@ phys_addr_t memblock_alloc_base(phys_addr_t size,
phys_addr_t align,
phys_addr_t __memblock_alloc_base(phys_addr_t size, phys_addr_t align,
phys_addr_t max_addr);
phys_addr_t memblock_phys_mem_size(void);
+phys_addr_t memblock_mem_size(unsigned long limit_pfn);
phys_addr_t memblock_start_of_DRAM(void);
phys_addr_t memblock_end_of_DRAM(void);
void memblock_enforce_memory_limit(phys_addr_t memory_limit);
diff --git a/mm/memblock.c b/mm/memblock.c
index 88adc8a..b8d9147 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -828,6 +828,23 @@ phys_addr_t __init memblock_phys_mem_size(void)
return memblock.memory.total_size;
}
+phys_addr_t __init memblock_mem_size(unsigned long limit_pfn)
+{
+ unsigned long pages = 0;
+ struct memblock_region *r;
+ unsigned long start_pfn, end_pfn;
+
+ for_each_memblock(memory, r) {
+ start_pfn = memblock_region_memory_base_pfn(r);
+ end_pfn = memblock_region_memory_end_pfn(r);
+ start_pfn = min_t(unsigned long, start_pfn, limit_pfn);
+ end_pfn = min_t(unsigned long, end_pfn, limit_pfn);
+ pages += end_pfn - start_pfn;
+ }
+
+ return (phys_addr_t)pages << PAGE_SHIFT;
+}
+
/* lowest address */
phys_addr_t __init_memblock memblock_start_of_DRAM(void)
{
--
1.7.10.4
--
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