[PATCH 15/36] x86: change range end to start+size

Yinghai Lu
2010-01-21T06:29:32Z

so make interface more consistent with early_res.
later we can share some code with early_res.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
---
arch/x86/kernel/cpu/mtrr/cleanup.c | 32 ++++++++++++++++----------------
arch/x86/kernel/e820.c | 2 +-
arch/x86/pci/amd_bus.c | 24 ++++++++++++++----------
kernel/range.c | 20 ++++++++++----------
mm/bootmem.c | 2 +-
mm/page_alloc.c | 2 +-
6 files changed, 43 insertions(+), 39 deletions(-)

diff --git a/arch/x86/kernel/cpu/mtrr/cleanup.c b/arch/x86/kernel/cpu/mtrr/cleanup.c
index 669da09..06130b5 100644
--- a/arch/x86/kernel/cpu/mtrr/cleanup.c
+++ b/arch/x86/kernel/cpu/mtrr/cleanup.c
@@ -78,13 +78,13 @@ x86_get_mtrr_mem_range(struct range *range, int nr_range,
base = range_state[i].base_pfn;
size = range_state[i].size_pfn;
nr_range = add_range_with_merge(range, RANGE_NUM, nr_range,
- base, base + size - 1);
+ base, base + size);
}
if (debug_print) {
printk(KERN_DEBUG "After WB checking\n");
for (i = 0; i < nr_range; i++)
printk(KERN_DEBUG "MTRR MAP PFN: %016llx - %016llx\n",
- range[i].start, range[i].end + 1);
+ range[i].start, range[i].end);
}

/* Take out UC ranges: */
@@ -106,11 +106,11 @@ x86_get_mtrr_mem_range(struct range *range, int nr_range,
size -= (1<<(20-PAGE_SHIFT)) - base;
base = 1<<(20-PAGE_SHIFT);
}
- subtract_range(range, RANGE_NUM, base, base + size - 1);
+ subtract_range(range, RANGE_NUM, base, base + size);
}
if (extra_remove_size)
subtract_range(range, RANGE_NUM, extra_remove_base,
- extra_remove_base + extra_remove_size - 1);
+ extra_remove_base + extra_remove_size);

if (debug_print) {
printk(KERN_DEBUG "After UC checking\n");
@@ -118,7 +118,7 @@ x86_get_mtrr_mem_range(struct range *range, int nr_range,
if (!range[i].end)
continue;
printk(KERN_DEBUG "MTRR MAP PFN: %016llx - %016llx\n",
- range[i].start, range[i].end + 1);
+ range[i].start, range[i].end);
}
}

@@ -128,7 +128,7 @@ x86_get_mtrr_mem_range(struct range *range, int nr_range,
printk(KERN_DEBUG "After sorting\n");
for (i = 0; i < nr_range; i++)
printk(KERN_DEBUG "MTRR MAP PFN: %016llx - %016llx\n",
- range[i].start, range[i].end + 1);
+ range[i].start, range[i].end);
}

return nr_range;
@@ -142,7 +142,7 @@ static unsigned long __init sum_ranges(struct range *range, int nr_range)
int i;

for (i = 0; i < nr_range; i++)
- sum += range[i].end + 1 - range[i].start;
+ sum += range[i].end - range[i].start;

return sum;
}
@@ -489,7 +489,7 @@ x86_setup_var_mtrrs(struct range *range, int nr_range,
/* Write the range: */
for (i = 0; i < nr_range; i++) {
set_var_mtrr_range(&var_state, range[i].start,
- range[i].end - range[i].start + 1);
+ range[i].end - range[i].start);
}

/* Write the last range: */
@@ -720,7 +720,7 @@ int __init mtrr_cleanup(unsigned address_bits)
* and fixed mtrrs should take effect before var mtrr for it:
*/
nr_range = add_range_with_merge(range, RANGE_NUM, nr_range, 0,
- (1ULL<<(20 - PAGE_SHIFT)) - 1);
+ 1ULL<<(20 - PAGE_SHIFT));
/* Sort the ranges: */
sort_range(range, nr_range);

@@ -939,9 +939,9 @@ int __init mtrr_trim_uncached_memory(unsigned long end_pfn)
nr_range = 0;
if (mtrr_tom2) {
range[nr_range].start = (1ULL<<(32 - PAGE_SHIFT));
- range[nr_range].end = (mtrr_tom2 >> PAGE_SHIFT) - 1;
- if (highest_pfn < range[nr_range].end + 1)
- highest_pfn = range[nr_range].end + 1;
+ range[nr_range].end = mtrr_tom2 >> PAGE_SHIFT;
+ if (highest_pfn < range[nr_range].end)
+ highest_pfn = range[nr_range].end;
nr_range++;
}
nr_range = x86_get_mtrr_mem_range(range, nr_range, 0, 0);
@@ -953,15 +953,15 @@ int __init mtrr_trim_uncached_memory(unsigned long end_pfn)

/* Check the holes: */
for (i = 0; i < nr_range - 1; i++) {
- if (range[i].end + 1 < range[i+1].start)
- total_trim_size += real_trim_memory(range[i].end + 1,
+ if (range[i].end < range[i+1].start)
+ total_trim_size += real_trim_memory(range[i].end,
range[i+1].start);
}

/* Check the top: */
i = nr_range - 1;
- if (range[i].end + 1 < end_pfn)
- total_trim_size += real_trim_memory(range[i].end + 1,
+ if (range[i].end < end_pfn)
+ total_trim_size += real_trim_memory(range[i].end,
end_pfn);

if (total_trim_size) {
diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
index 155b2d6..bd6a361 100644
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -1038,7 +1038,7 @@ static void __init subtract_early_res(struct range *range, int az)
printk(KERN_CONT " subtract pfn [%010llx - %010llx]\n",
final_start, final_end);
#endif
- subtract_range(range, az, final_start, final_end - 1);
+ subtract_range(range, az, final_start, final_end);
}

}
diff --git a/arch/x86/pci/amd_bus.c b/arch/x86/pci/amd_bus.c
index 6221720..38e85b5 100644
--- a/arch/x86/pci/amd_bus.c
+++ b/arch/x86/pci/amd_bus.c
@@ -144,7 +144,7 @@ static int __init early_fill_mp_bus_info(void)
def_link = (reg >> 8) & 0x03;

memset(range, 0, sizeof(range));
- range[0].end = 0xffff;
+ add_range(range, RANGE_NUM, 0, 0, 0xffff + 1);
/* io port resource */
for (i = 0; i < 4; i++) {
reg = read_pci_config(bus, slot, 1, 0xc0 + (i << 3));
@@ -174,7 +174,7 @@ static int __init early_fill_mp_bus_info(void)
if (end > 0xffff)
end = 0xffff;
update_res(info, start, end, IORESOURCE_IO, 1);
- subtract_range(range, RANGE_NUM, start, end);
+ subtract_range(range, RANGE_NUM, start, end + 1);
}
/* add left over io port range to def node/link, [0, 0xffff] */
/* find the position */
@@ -189,14 +189,16 @@ static int __init early_fill_mp_bus_info(void)
if (!range[i].end)
continue;

- update_res(info, range[i].start, range[i].end,
+ update_res(info, range[i].start, range[i].end - 1,
IORESOURCE_IO, 1);
}
}

memset(range, 0, sizeof(range));
/* 0xfd00000000-0xffffffffff for HT */
- range[0].end = cap_resource((0xfdULL<<32) - 1);
+ end = cap_resource((0xfdULL<<32) - 1);
+ end++;
+ add_range(range, RANGE_NUM, 0, 0, end);

/* need to take out [0, TOM) for RAM*/
address = MSR_K8_TOP_MEM1;
@@ -204,14 +206,15 @@ static int __init early_fill_mp_bus_info(void)
end = (val & 0xffffff800000ULL);
printk(KERN_INFO "TOM: %016llx aka %lldM\n", end, end>>20);
if (end < (1ULL<<32))
- subtract_range(range, RANGE_NUM, 0, end - 1);
+ subtract_range(range, RANGE_NUM, 0, end);

/* get mmconfig */
get_pci_mmcfg_amd_fam10h_range();
/* need to take out mmconf range */
if (fam10h_mmconf_end) {
printk(KERN_DEBUG "Fam 10h mmconf [%llx, %llx]\n", fam10h_mmconf_start, fam10h_mmconf_end);
- subtract_range(range, RANGE_NUM, fam10h_mmconf_start, fam10h_mmconf_end);
+ subtract_range(range, RANGE_NUM, fam10h_mmconf_start,
+ fam10h_mmconf_end + 1);
}

/* mmio resource */
@@ -266,7 +269,8 @@ static int __init early_fill_mp_bus_info(void)
/* we got a hole */
endx = fam10h_mmconf_start - 1;
update_res(info, start, endx, IORESOURCE_MEM, 0);
- subtract_range(range, RANGE_NUM, start, endx);
+ subtract_range(range, RANGE_NUM, start,
+ endx + 1);
printk(KERN_CONT " ==> [%llx, %llx]", start, endx);
start = fam10h_mmconf_end + 1;
changed = 1;
@@ -283,7 +287,7 @@ static int __init early_fill_mp_bus_info(void)

update_res(info, cap_resource(start), cap_resource(end),
IORESOURCE_MEM, 1);
- subtract_range(range, RANGE_NUM, start, end);
+ subtract_range(range, RANGE_NUM, start, end + 1);
printk(KERN_CONT "\n");
}

@@ -298,7 +302,7 @@ static int __init early_fill_mp_bus_info(void)
rdmsrl(address, val);
end = (val & 0xffffff800000ULL);
printk(KERN_INFO "TOM2: %016llx aka %lldM\n", end, end>>20);
- subtract_range(range, RANGE_NUM, 1ULL<<32, end - 1);
+ subtract_range(range, RANGE_NUM, 1ULL<<32, end);
}

/*
@@ -318,7 +322,7 @@ static int __init early_fill_mp_bus_info(void)
continue;

update_res(info, cap_resource(range[i].start),
- cap_resource(range[i].end),
+ cap_resource(range[i].end - 1),
IORESOURCE_MEM, 1);
}
}
diff --git a/kernel/range.c b/kernel/range.c
index 71e0021..74e2e61 100644
--- a/kernel/range.c
+++ b/kernel/range.c
@@ -13,7 +13,7 @@

int add_range(struct range *range, int az, int nr_range, u64 start, u64 end)
{
- if (start > end)
+ if (start >= end)
return nr_range;

/* Out of slots: */
@@ -33,7 +33,7 @@ int add_range_with_merge(struct range *range, int az, int nr_range,
{
int i;

- if (start > end)
+ if (start >= end)
return nr_range;

/* Try to merge it with old one: */
@@ -46,7 +46,7 @@ int add_range_with_merge(struct range *range, int az, int nr_range,

common_start = max(range[i].start, start);
common_end = min(range[i].end, end);
- if (common_start > common_end + 1)
+ if (common_start > common_end)
continue;

final_start = min(range[i].start, start);
@@ -65,7 +65,7 @@ void subtract_range(struct range *range, int az, u64 start, u64 end)
{
int i, j;

- if (start > end)
+ if (start >= end)
return;

for (j = 0; j < az; j++) {
@@ -79,15 +79,15 @@ void subtract_range(struct range *range, int az, u64 start, u64 end)
}

if (start <= range[j].start && end < range[j].end &&
- range[j].start < end + 1) {
- range[j].start = end + 1;
+ range[j].start < end) {
+ range[j].start = end;
continue;
}

if (start > range[j].start && end >= range[j].end &&
- range[j].end > start - 1) {
- range[j].end = start - 1;
+ range[j].end > start) {
+ range[j].end = start;
continue;
}

@@ -99,11 +99,11 @@ void subtract_range(struct range *range, int az, u64 start, u64 end)
}
if (i < az) {
range[i].end = range[j].end;
- range[i].start = end + 1;
+ range[i].start = end;
} else {
printk(KERN_ERR "run of slot in ranges\n");
}
- range[j].end = start - 1;
+ range[j].end = start;
continue;
}
}
diff --git a/mm/bootmem.c b/mm/bootmem.c
index 64a5000..bb7faad 100644
--- a/mm/bootmem.c
+++ b/mm/bootmem.c
@@ -215,7 +215,7 @@ unsigned long __init free_all_memory_core_early(int nodeid)

for (i = 0; i < nr_range; i++) {
start = range[i].start;
- end = range[i].end + 1;
+ end = range[i].end;
count += end - start;
__free_pages_memory(start, end);
}
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 8ab9a38..e4e77ef 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -3444,7 +3444,7 @@ int __init add_from_early_node_map(struct range *range, int az,
for_each_active_range_index_in_nid(i, nid) {
start = early_node_map[i].start_pfn;
end = early_node_map[i].end_pfn;
- nr_range = add_range(range, az, nr_range, start, end - 1);
+ nr_range = add_range(range, az, nr_range, start, end);
}
return nr_range;
}
--
1.6.4.2