[PATCH] mm/memory_hotplug: Rename all existing 'memhp' into 'mhp'

Anshuman Khandual
2021-01-25T05:57:24Z

This renames all 'memhp' instances to 'mhp' except for memhp_default_state
for being a kernel command line option. This is just a clean up and should
not cause a functional change.

Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-mm@kvack.org
Cc: linux-kernel@vger.kernel.org
Suggested-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
---
During hotplug arch callback series, it was proposed to convert all the
remaining 'memhp' into 'mhp' instead.

https://lore.kernel.org/linux-mm/c37de2d0-28a1-4f7d-f944-cfd7d81c334d@redhat.com/

This applies on v5.11-rc5. After this change, 'memhp' is only mentioned
for 'memhp_default_state' kernel command line paramater and its related
function. A tree wide search gives the following result.

$git grep memhp

Documentation/admin-guide/kernel-parameters.txt: memhp_default_state=online/offline
mm/memory_hotplug.c:static int __init setup_memhp_default_state(char *str)
mm/memory_hotplug.c:__setup("memhp_default_state=", setup_memhp_default_state);

drivers/base/memory.c | 10 +++++-----
include/linux/memory_hotplug.h | 4 ++--
mm/memory_hotplug.c | 12 ++++++------
3 files changed, 13 insertions(+), 13 deletions(-)

diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index f0303c8b4f14..8c7a5818fea9 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -35,7 +35,7 @@ static const char *const online_type_to_str[] = {
[MMOP_ONLINE_MOVABLE] = "online_movable",
};

-int memhp_online_type_from_str(const char *str)
+int mhp_online_type_from_str(const char *str)
{
int i;

@@ -253,7 +253,7 @@ static int memory_subsys_offline(struct device *dev)
static ssize_t state_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
- const int online_type = memhp_online_type_from_str(buf);
+ const int online_type = mhp_online_type_from_str(buf);
struct memory_block *mem = to_memory_block(dev);
int ret;

@@ -387,19 +387,19 @@ static ssize_t auto_online_blocks_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
return sysfs_emit(buf, "%s\n",
- online_type_to_str[memhp_default_online_type]);
+ online_type_to_str[mhp_default_online_type]);
}

static ssize_t auto_online_blocks_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
- const int online_type = memhp_online_type_from_str(buf);
+ const int online_type = mhp_online_type_from_str(buf);

if (online_type < 0)
return -EINVAL;

- memhp_default_online_type = online_type;
+ mhp_default_online_type = online_type;
return count;
}

diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h
index e4c80561e519..e0cc6bc1e948 100644
--- a/include/linux/memory_hotplug.h
+++ b/include/linux/memory_hotplug.h
@@ -134,10 +134,10 @@ extern int arch_add_memory(int nid, u64 start, u64 size,
struct mhp_params *params);
extern u64 max_mem_size;

-extern int memhp_online_type_from_str(const char *str);
+extern int mhp_online_type_from_str(const char *str);

/* Default online_type (MMOP_*) when new memory blocks are added. */
-extern int memhp_default_online_type;
+extern int mhp_default_online_type;
/* If movable_node boot option specified */
extern bool movable_node_enabled;
static inline bool movable_node_is_enabled(void)
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index fb734a865807..5e35e4024785 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -67,17 +67,17 @@ void put_online_mems(void)
bool movable_node_enabled = false;

#ifndef CONFIG_MEMORY_HOTPLUG_DEFAULT_ONLINE
-int memhp_default_online_type = MMOP_OFFLINE;
+int mhp_default_online_type = MMOP_OFFLINE;
#else
-int memhp_default_online_type = MMOP_ONLINE;
+int mhp_default_online_type = MMOP_ONLINE;
#endif

static int __init setup_memhp_default_state(char *str)
{
- const int online_type = memhp_online_type_from_str(str);
+ const int online_type = mhp_online_type_from_str(str);

if (online_type >= 0)
- memhp_default_online_type = online_type;
+ mhp_default_online_type = online_type;

return 1;
}
@@ -992,7 +992,7 @@ static int check_hotplug_memory_range(u64 start, u64 size)

static int online_memory_block(struct memory_block *mem, void *arg)
{
- mem->online_type = memhp_default_online_type;
+ mem->online_type = mhp_default_online_type;
return device_online(&mem->dev);
}

@@ -1073,7 +1073,7 @@ int __ref add_memory_resource(int nid, struct resource *res, mhp_t mhp_flags)
merge_system_ram_resource(res);

/* online pages if requested */
- if (memhp_default_online_type != MMOP_OFFLINE)
+ if (mhp_default_online_type != MMOP_OFFLINE)
walk_memory_blocks(start, size, NULL, online_memory_block);

return ret;
--
2.20.1