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From: Nathan Fontenot on 15 Jul 2010 14:40
Add a new 'end_phys_index' file to each memory sysfs directory to
report the physical index of the last memory section
covered by the sysfs directory.

Signed-off-by: Nathan Fontenot <nfont(a)austin.ibm.com>
---
drivers/base/memory.c | 14 +++++++++++++-
include/linux/memory.h | 3 +++
2 files changed, 16 insertions(+), 1 deletion(-)

Index: linux-2.6/drivers/base/memory.c
===================================================================
--- linux-2.6.orig/drivers/base/memory.c 2010-07-15 09:55:54.000000000 -0500
+++ linux-2.6/drivers/base/memory.c 2010-07-15 09:56:05.000000000 -0500
@@ -121,7 +121,15 @@
{
struct memory_block *mem =
container_of(dev, struct memory_block, sysdev);
- return sprintf(buf, "%08lx\n", mem->phys_index);
+ return sprintf(buf, "%08lx\n", mem->start_phys_index);
+}
+
+static ssize_t show_mem_end_phys_index(struct sys_device *dev,
+ struct sysdev_attribute *attr, char *buf)
+{
+ struct memory_block *mem =
+ container_of(dev, struct memory_block, sysdev);
+ return sprintf(buf, "%08lx\n", mem->end_phys_index);
}

/*
@@ -321,6 +329,7 @@
}

static SYSDEV_ATTR(phys_index, 0444, show_mem_phys_index, NULL);
+static SYSDEV_ATTR(end_phys_index, 0444, show_mem_end_phys_index, NULL);
static SYSDEV_ATTR(state, 0644, show_mem_state, store_mem_state);
static SYSDEV_ATTR(phys_device, 0444, show_phys_device, NULL);
static SYSDEV_ATTR(removable, 0444, show_mem_removable, NULL);
@@ -533,6 +542,8 @@
if (!ret)
ret = mem_create_simple_file(mem, phys_index);
if (!ret)
+ ret = mem_create_simple_file(mem, end_phys_index);
+ if (!ret)
ret = mem_create_simple_file(mem, state);
if (!ret)
ret = mem_create_simple_file(mem, phys_device);
@@ -577,6 +588,7 @@
if (list_empty(&mem->sections)) {
unregister_mem_sect_under_nodes(mem);
mem_remove_simple_file(mem, phys_index);
+ mem_remove_simple_file(mem, end_phys_index);
mem_remove_simple_file(mem, state);
mem_remove_simple_file(mem, phys_device);
mem_remove_simple_file(mem, removable);
Index: linux-2.6/include/linux/memory.h
===================================================================
--- linux-2.6.orig/include/linux/memory.h 2010-07-15 09:54:06.000000000 -0500
+++ linux-2.6/include/linux/memory.h 2010-07-15 09:56:05.000000000 -0500
@@ -29,6 +29,9 @@

struct memory_block {
unsigned long state;
+ unsigned long start_phys_index;
+ unsigned long end_phys_index;
+
/*
* This serializes all state change requests. It isn't
* held during creation because the control files are

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Prev: [PATCH 1/5] v2 Split the memory_block structure
Next: [PATCH 03/25] atm: Convert pci_table entries to PCI_VDEVICE (if PCI_ANY_ID is used)