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authorYinghai Lu <yinghai@kernel.org>2010-08-25 13:39:17 -0700
committerH. Peter Anvin <hpa@zytor.com>2010-08-27 11:12:29 -0700
commit72d7c3b33c980843e756681fb4867dc1efd62a76 (patch)
tree9607345d9fa055dd501aacf0772258fb72897035 /arch/x86/kernel/check.c
parent301ff3e88ef9ff4bdb92f36a3e6170fce4c9dd34 (diff)
x86: Use memblock to replace early_res
1. replace find_e820_area with memblock_find_in_range 2. replace reserve_early with memblock_x86_reserve_range 3. replace free_early with memblock_x86_free_range. 4. NO_BOOTMEM will switch to use memblock too. 5. use _e820, _early wrap in the patch, in following patch, will replace them all 6. because memblock_x86_free_range support partial free, we can remove some special care 7. Need to make sure that memblock_find_in_range() is called after memblock_x86_fill() so adjust some calling later in setup.c::setup_arch() -- corruption_check and mptable_update -v2: Move reserve_brk() early Before fill_memblock_area, to avoid overlap between brk and memblock_find_in_range() that could happen We have more then 128 RAM entry in E820 tables, and memblock_x86_fill() could use memblock_find_in_range() to find a new place for memblock.memory.region array. and We don't need to use extend_brk() after fill_memblock_area() So move reserve_brk() early before fill_memblock_area(). -v3: Move find_smp_config early To make sure memblock_find_in_range not find wrong place, if BIOS doesn't put mptable in right place. -v4: Treat RESERVED_KERN as RAM in memblock.memory. and they are already in memblock.reserved already.. use __NOT_KEEP_MEMBLOCK to make sure memblock related code could be freed later. -v5: Generic version __memblock_find_in_range() is going from high to low, and for 32bit active_region for 32bit does include high pages need to replace the limit with memblock.default_alloc_limit, aka get_max_mapped() -v6: Use current_limit instead -v7: check with MEMBLOCK_ERROR instead of -1ULL or -1L -v8: Set memblock_can_resize early to handle EFI with more RAM entries -v9: update after kmemleak changes in mainline Suggested-by: David S. Miller <davem@davemloft.net> Suggested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Suggested-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'arch/x86/kernel/check.c')
-rw-r--r--arch/x86/kernel/check.c16
1 files changed, 9 insertions, 7 deletions
diff --git a/arch/x86/kernel/check.c b/arch/x86/kernel/check.c
index fc999e6fc46..13a38917951 100644
--- a/arch/x86/kernel/check.c
+++ b/arch/x86/kernel/check.c
@@ -2,7 +2,8 @@
#include <linux/sched.h>
#include <linux/kthread.h>
#include <linux/workqueue.h>
-#include <asm/e820.h>
+#include <linux/memblock.h>
+
#include <asm/proto.h>
/*
@@ -18,10 +19,12 @@ static int __read_mostly memory_corruption_check = -1;
static unsigned __read_mostly corruption_check_size = 64*1024;
static unsigned __read_mostly corruption_check_period = 60; /* seconds */
-static struct e820entry scan_areas[MAX_SCAN_AREAS];
+static struct scan_area {
+ u64 addr;
+ u64 size;
+} scan_areas[MAX_SCAN_AREAS];
static int num_scan_areas;
-
static __init int set_corruption_check(char *arg)
{
char *end;
@@ -81,9 +84,9 @@ void __init setup_bios_corruption_check(void)
while (addr < corruption_check_size && num_scan_areas < MAX_SCAN_AREAS) {
u64 size;
- addr = find_e820_area_size(addr, &size, PAGE_SIZE);
+ addr = memblock_x86_find_in_range_size(addr, &size, PAGE_SIZE);
- if (!(addr + 1))
+ if (addr == MEMBLOCK_ERROR)
break;
if (addr >= corruption_check_size)
@@ -92,7 +95,7 @@ void __init setup_bios_corruption_check(void)
if ((addr + size) > corruption_check_size)
size = corruption_check_size - addr;
- e820_update_range(addr, size, E820_RAM, E820_RESERVED);
+ memblock_x86_reserve_range(addr, addr + size, "SCAN RAM");
scan_areas[num_scan_areas].addr = addr;
scan_areas[num_scan_areas].size = size;
num_scan_areas++;
@@ -105,7 +108,6 @@ void __init setup_bios_corruption_check(void)
printk(KERN_INFO "Scanning %d areas for low memory corruption\n",
num_scan_areas);
- update_e820();
}