Patchwork [RFC,v4,4/13] memory-hotplug : remove /sys/firmware/memmap/X sysfs

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Submitter Yasuaki Ishimatsu
Date July 18, 2012, 10:09 a.m.
Message ID <50068B54.5070907@jp.fujitsu.com>
Download mbox | patch
Permalink /patch/171626/
State Not Applicable
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Comments

Yasuaki Ishimatsu - July 18, 2012, 10:09 a.m.
When (hot)adding memory into system, /sys/firmware/memmap/X/{end, start, type}
sysfs files are created. But there is no code to remove these files. The patch
implements the function to remove them.

Note : The code does not free firmware_map_entry since there is no way to free
       memory which is allocated by bootmem.

CC: David Rientjes <rientjes@google.com>
CC: Jiang Liu <liuj97@gmail.com>
CC: Len Brown <len.brown@intel.com>
CC: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: Paul Mackerras <paulus@samba.org> 
CC: Christoph Lameter <cl@linux.com>
Cc: Minchan Kim <minchan.kim@gmail.com>
CC: Andrew Morton <akpm@linux-foundation.org>
CC: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> 
CC: Wen Congyang <wency@cn.fujitsu.com>
Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>

---
 drivers/firmware/memmap.c    |   78 ++++++++++++++++++++++++++++++++++++++++++-
 include/linux/firmware-map.h |    6 +++
 mm/memory_hotplug.c          |    9 +++-
 3 files changed, 90 insertions(+), 3 deletions(-)
Wen Congyang - July 18, 2012, 10:33 a.m.
At 07/18/2012 06:09 PM, Yasuaki Ishimatsu Wrote:
> When (hot)adding memory into system, /sys/firmware/memmap/X/{end, start, type}
> sysfs files are created. But there is no code to remove these files. The patch
> implements the function to remove them.
> 
> Note : The code does not free firmware_map_entry since there is no way to free
>        memory which is allocated by bootmem.
> 
> CC: David Rientjes <rientjes@google.com>
> CC: Jiang Liu <liuj97@gmail.com>
> CC: Len Brown <len.brown@intel.com>
> CC: Benjamin Herrenschmidt <benh@kernel.crashing.org>
> CC: Paul Mackerras <paulus@samba.org> 
> CC: Christoph Lameter <cl@linux.com>
> Cc: Minchan Kim <minchan.kim@gmail.com>
> CC: Andrew Morton <akpm@linux-foundation.org>
> CC: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> 
> CC: Wen Congyang <wency@cn.fujitsu.com>
> Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
> 
> ---
>  drivers/firmware/memmap.c    |   78 ++++++++++++++++++++++++++++++++++++++++++-
>  include/linux/firmware-map.h |    6 +++
>  mm/memory_hotplug.c          |    9 +++-
>  3 files changed, 90 insertions(+), 3 deletions(-)
> 
> Index: linux-3.5-rc6/mm/memory_hotplug.c
> ===================================================================
> --- linux-3.5-rc6.orig/mm/memory_hotplug.c	2012-07-18 17:20:05.670024283 +0900
> +++ linux-3.5-rc6/mm/memory_hotplug.c	2012-07-18 17:51:03.933189930 +0900
> @@ -1012,9 +1012,9 @@ int offline_memory(u64 start, u64 size)
>  	return offline_pages(start_pfn, end_pfn, 120 * HZ);
>  }
>  
> -int remove_memory(int nid, u64 start, u64 size)
> +int __ref remove_memory(int nid, u64 start, u64 size)
>  {
> -	int ret = -EBUSY;
> +	int ret = 0;
>  	lock_memory_hotplug();
>  	/*
>  	 * The memory might become online by other task, even if you offine it.
> @@ -1025,8 +1025,13 @@ int remove_memory(int nid, u64 start, u6
>  			"because the memmory range is online\n",
>  			start, start + size);
>  		ret = -EAGAIN;
> +		goto out;
>  	}
>  
> +	/* remove memmap entry */
> +	firmware_map_remove(start, start + size, "System RAM");
> +
> +out:
>  	unlock_memory_hotplug();
>  	return ret;
>  
> Index: linux-3.5-rc6/include/linux/firmware-map.h
> ===================================================================
> --- linux-3.5-rc6.orig/include/linux/firmware-map.h	2012-07-18 17:19:37.007382563 +0900
> +++ linux-3.5-rc6/include/linux/firmware-map.h	2012-07-18 17:42:20.804730245 +0900
> @@ -25,6 +25,7 @@
>  
>  int firmware_map_add_early(u64 start, u64 end, const char *type);
>  int firmware_map_add_hotplug(u64 start, u64 end, const char *type);
> +int firmware_map_remove(u64 start, u64 end, const char *type);
>  
>  #else /* CONFIG_FIRMWARE_MEMMAP */
>  
> @@ -38,6 +39,11 @@ static inline int firmware_map_add_hotpl
>  	return 0;
>  }
>  
> +static inline int firmware_map_remove(u64 start, u64 end, const char *type)
> +{
> +	return 0;
> +}
> +
>  #endif /* CONFIG_FIRMWARE_MEMMAP */
>  
>  #endif /* _LINUX_FIRMWARE_MAP_H */
> Index: linux-3.5-rc6/drivers/firmware/memmap.c
> ===================================================================
> --- linux-3.5-rc6.orig/drivers/firmware/memmap.c	2012-07-18 17:19:43.618300182 +0900
> +++ linux-3.5-rc6/drivers/firmware/memmap.c	2012-07-18 17:42:20.846729721 +0900
> @@ -21,6 +21,7 @@
>  #include <linux/types.h>
>  #include <linux/bootmem.h>
>  #include <linux/slab.h>
> +#include <linux/mm.h>
>  
>  /*
>   * Data types ------------------------------------------------------------------
> @@ -79,7 +80,22 @@ static const struct sysfs_ops memmap_att
>  	.show = memmap_attr_show,
>  };
>  
> +#define to_memmap_entry(obj) container_of(obj, struct firmware_map_entry, kobj)
> +
> +static void release_firmware_map_entry(struct kobject *kobj)
> +{
> +	struct firmware_map_entry *entry = to_memmap_entry(kobj);
> +	struct page *page;
> +
> +	page = virt_to_page(entry);
> +	if (PageSlab(page) || PageCompound(page))
> +		kfree(entry);

IIRC, this function's implementation is changed. Why do you do it?
If PageCompound(page), should we check page->first_page's flags?

Thanks
Wen Congyang

> +
> +	/* There is no way to free memory allocated from bootmem*/
> +}
> +
>  static struct kobj_type memmap_ktype = {
> +	.release	= release_firmware_map_entry,
>  	.sysfs_ops	= &memmap_attr_ops,
>  	.default_attrs	= def_attrs,
>  };
> @@ -123,6 +139,16 @@ static int firmware_map_add_entry(u64 st
>  	return 0;
>  }
>  
> +/**
> + * firmware_map_remove_entry() - Does the real work to remove a firmware
> + * memmap entry.
> + * @entry: removed entry.
> + **/
> +static inline void firmware_map_remove_entry(struct firmware_map_entry *entry)
> +{
> +	list_del(&entry->list);
> +}
> +
>  /*
>   * Add memmap entry on sysfs
>   */
> @@ -144,6 +170,31 @@ static int add_sysfs_fw_map_entry(struct
>  	return 0;
>  }
>  
> +/*
> + * Remove memmap entry on sysfs
> + */
> +static inline void remove_sysfs_fw_map_entry(struct firmware_map_entry *entry)
> +{
> +	kobject_put(&entry->kobj);
> +}
> +
> +/*
> + * Search memmap entry
> + */
> +
> +struct firmware_map_entry * __meminit
> +find_firmware_map_entry(u64 start, u64 end, const char *type)
> +{
> +	struct firmware_map_entry *entry;
> +
> +	list_for_each_entry(entry, &map_entries, list)
> +		if ((entry->start == start) && (entry->end == end) &&
> +		    (!strcmp(entry->type, type)))
> +			return entry;
> +
> +	return NULL;
> +}
> +
>  /**
>   * firmware_map_add_hotplug() - Adds a firmware mapping entry when we do
>   * memory hotplug.
> @@ -196,6 +247,32 @@ int __init firmware_map_add_early(u64 st
>  	return firmware_map_add_entry(start, end, type, entry);
>  }
>  
> +/**
> + * firmware_map_remove() - remove a firmware mapping entry
> + * @start: Start of the memory range.
> + * @end:   End of the memory range.
> + * @type:  Type of the memory range.
> + *
> + * removes a firmware mapping entry.
> + *
> + * Returns 0 on success, or -EINVAL if no entry.
> + **/
> +int __meminit firmware_map_remove(u64 start, u64 end, const char *type)
> +{
> +	struct firmware_map_entry *entry;
> +
> +	entry = find_firmware_map_entry(start, end - 1, type);
> +	if (!entry)
> +		return -EINVAL;
> +
> +	firmware_map_remove_entry(entry);
> +
> +	/* remove the memmap entry */
> +	remove_sysfs_fw_map_entry(entry);
> +
> +	return 0;
> +}
> +
>  /*
>   * Sysfs functions -------------------------------------------------------------
>   */
> @@ -218,7 +295,6 @@ static ssize_t type_show(struct firmware
>  }
>  
>  #define to_memmap_attr(_attr) container_of(_attr, struct memmap_attribute, attr)
> -#define to_memmap_entry(obj) container_of(obj, struct firmware_map_entry, kobj)
>  
>  static ssize_t memmap_attr_show(struct kobject *kobj,
>  				struct attribute *attr, char *buf)
> 
> --
> To unsubscribe from this list: send the line "unsubscribe linux-acpi" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>
Yasuaki Ishimatsu - July 18, 2012, 10:51 a.m.
Hi Wen,

2012/07/18 19:33, Wen Congyang wrote:
> At 07/18/2012 06:09 PM, Yasuaki Ishimatsu Wrote:
>> When (hot)adding memory into system, /sys/firmware/memmap/X/{end, start, type}
>> sysfs files are created. But there is no code to remove these files. The patch
>> implements the function to remove them.
>>
>> Note : The code does not free firmware_map_entry since there is no way to free
>>         memory which is allocated by bootmem.
>>
>> CC: David Rientjes <rientjes@google.com>
>> CC: Jiang Liu <liuj97@gmail.com>
>> CC: Len Brown <len.brown@intel.com>
>> CC: Benjamin Herrenschmidt <benh@kernel.crashing.org>
>> CC: Paul Mackerras <paulus@samba.org>
>> CC: Christoph Lameter <cl@linux.com>
>> Cc: Minchan Kim <minchan.kim@gmail.com>
>> CC: Andrew Morton <akpm@linux-foundation.org>
>> CC: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
>> CC: Wen Congyang <wency@cn.fujitsu.com>
>> Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
>>
>> ---
>>   drivers/firmware/memmap.c    |   78 ++++++++++++++++++++++++++++++++++++++++++-
>>   include/linux/firmware-map.h |    6 +++
>>   mm/memory_hotplug.c          |    9 +++-
>>   3 files changed, 90 insertions(+), 3 deletions(-)
>>
>> Index: linux-3.5-rc6/mm/memory_hotplug.c
>> ===================================================================
>> --- linux-3.5-rc6.orig/mm/memory_hotplug.c	2012-07-18 17:20:05.670024283 +0900
>> +++ linux-3.5-rc6/mm/memory_hotplug.c	2012-07-18 17:51:03.933189930 +0900
>> @@ -1012,9 +1012,9 @@ int offline_memory(u64 start, u64 size)
>>   	return offline_pages(start_pfn, end_pfn, 120 * HZ);
>>   }
>>   
>> -int remove_memory(int nid, u64 start, u64 size)
>> +int __ref remove_memory(int nid, u64 start, u64 size)
>>   {
>> -	int ret = -EBUSY;
>> +	int ret = 0;
>>   	lock_memory_hotplug();
>>   	/*
>>   	 * The memory might become online by other task, even if you offine it.
>> @@ -1025,8 +1025,13 @@ int remove_memory(int nid, u64 start, u6
>>   			"because the memmory range is online\n",
>>   			start, start + size);
>>   		ret = -EAGAIN;
>> +		goto out;
>>   	}
>>   
>> +	/* remove memmap entry */
>> +	firmware_map_remove(start, start + size, "System RAM");
>> +
>> +out:
>>   	unlock_memory_hotplug();
>>   	return ret;
>>   
>> Index: linux-3.5-rc6/include/linux/firmware-map.h
>> ===================================================================
>> --- linux-3.5-rc6.orig/include/linux/firmware-map.h	2012-07-18 17:19:37.007382563 +0900
>> +++ linux-3.5-rc6/include/linux/firmware-map.h	2012-07-18 17:42:20.804730245 +0900
>> @@ -25,6 +25,7 @@
>>   
>>   int firmware_map_add_early(u64 start, u64 end, const char *type);
>>   int firmware_map_add_hotplug(u64 start, u64 end, const char *type);
>> +int firmware_map_remove(u64 start, u64 end, const char *type);
>>   
>>   #else /* CONFIG_FIRMWARE_MEMMAP */
>>   
>> @@ -38,6 +39,11 @@ static inline int firmware_map_add_hotpl
>>   	return 0;
>>   }
>>   
>> +static inline int firmware_map_remove(u64 start, u64 end, const char *type)
>> +{
>> +	return 0;
>> +}
>> +
>>   #endif /* CONFIG_FIRMWARE_MEMMAP */
>>   
>>   #endif /* _LINUX_FIRMWARE_MAP_H */
>> Index: linux-3.5-rc6/drivers/firmware/memmap.c
>> ===================================================================
>> --- linux-3.5-rc6.orig/drivers/firmware/memmap.c	2012-07-18 17:19:43.618300182 +0900
>> +++ linux-3.5-rc6/drivers/firmware/memmap.c	2012-07-18 17:42:20.846729721 +0900
>> @@ -21,6 +21,7 @@
>>   #include <linux/types.h>
>>   #include <linux/bootmem.h>
>>   #include <linux/slab.h>
>> +#include <linux/mm.h>
>>   
>>   /*
>>    * Data types ------------------------------------------------------------------
>> @@ -79,7 +80,22 @@ static const struct sysfs_ops memmap_att
>>   	.show = memmap_attr_show,
>>   };
>>   
>> +#define to_memmap_entry(obj) container_of(obj, struct firmware_map_entry, kobj)
>> +
>> +static void release_firmware_map_entry(struct kobject *kobj)
>> +{
>> +	struct firmware_map_entry *entry = to_memmap_entry(kobj);
>> +	struct page *page;
>> +
>> +	page = virt_to_page(entry);
>> +	if (PageSlab(page) || PageCompound(page))
>> +		kfree(entry);
> 
> IIRC, this function's implementation is changed. Why do you do it?
> If PageCompound(page), should we check page->first_page's flags?

I forgot to write the change to change log. Jiang and Christoph discussed
how to find the slab page:

- https://lkml.org/lkml/2012/7/6/333

Then, Christoph proposed this method.  So I changed it.

Thanks,
Yasuaki Ishimatsu

> 
> Thanks
> Wen Congyang
> 
>> +
>> +	/* There is no way to free memory allocated from bootmem*/
>> +}
>> +
>>   static struct kobj_type memmap_ktype = {
>> +	.release	= release_firmware_map_entry,
>>   	.sysfs_ops	= &memmap_attr_ops,
>>   	.default_attrs	= def_attrs,
>>   };
>> @@ -123,6 +139,16 @@ static int firmware_map_add_entry(u64 st
>>   	return 0;
>>   }
>>   
>> +/**
>> + * firmware_map_remove_entry() - Does the real work to remove a firmware
>> + * memmap entry.
>> + * @entry: removed entry.
>> + **/
>> +static inline void firmware_map_remove_entry(struct firmware_map_entry *entry)
>> +{
>> +	list_del(&entry->list);
>> +}
>> +
>>   /*
>>    * Add memmap entry on sysfs
>>    */
>> @@ -144,6 +170,31 @@ static int add_sysfs_fw_map_entry(struct
>>   	return 0;
>>   }
>>   
>> +/*
>> + * Remove memmap entry on sysfs
>> + */
>> +static inline void remove_sysfs_fw_map_entry(struct firmware_map_entry *entry)
>> +{
>> +	kobject_put(&entry->kobj);
>> +}
>> +
>> +/*
>> + * Search memmap entry
>> + */
>> +
>> +struct firmware_map_entry * __meminit
>> +find_firmware_map_entry(u64 start, u64 end, const char *type)
>> +{
>> +	struct firmware_map_entry *entry;
>> +
>> +	list_for_each_entry(entry, &map_entries, list)
>> +		if ((entry->start == start) && (entry->end == end) &&
>> +		    (!strcmp(entry->type, type)))
>> +			return entry;
>> +
>> +	return NULL;
>> +}
>> +
>>   /**
>>    * firmware_map_add_hotplug() - Adds a firmware mapping entry when we do
>>    * memory hotplug.
>> @@ -196,6 +247,32 @@ int __init firmware_map_add_early(u64 st
>>   	return firmware_map_add_entry(start, end, type, entry);
>>   }
>>   
>> +/**
>> + * firmware_map_remove() - remove a firmware mapping entry
>> + * @start: Start of the memory range.
>> + * @end:   End of the memory range.
>> + * @type:  Type of the memory range.
>> + *
>> + * removes a firmware mapping entry.
>> + *
>> + * Returns 0 on success, or -EINVAL if no entry.
>> + **/
>> +int __meminit firmware_map_remove(u64 start, u64 end, const char *type)
>> +{
>> +	struct firmware_map_entry *entry;
>> +
>> +	entry = find_firmware_map_entry(start, end - 1, type);
>> +	if (!entry)
>> +		return -EINVAL;
>> +
>> +	firmware_map_remove_entry(entry);
>> +
>> +	/* remove the memmap entry */
>> +	remove_sysfs_fw_map_entry(entry);
>> +
>> +	return 0;
>> +}
>> +
>>   /*
>>    * Sysfs functions -------------------------------------------------------------
>>    */
>> @@ -218,7 +295,6 @@ static ssize_t type_show(struct firmware
>>   }
>>   
>>   #define to_memmap_attr(_attr) container_of(_attr, struct memmap_attribute, attr)
>> -#define to_memmap_entry(obj) container_of(obj, struct firmware_map_entry, kobj)
>>   
>>   static ssize_t memmap_attr_show(struct kobject *kobj,
>>   				struct attribute *attr, char *buf)
>>
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-acpi" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>
>

Patch

Index: linux-3.5-rc6/mm/memory_hotplug.c
===================================================================
--- linux-3.5-rc6.orig/mm/memory_hotplug.c	2012-07-18 17:20:05.670024283 +0900
+++ linux-3.5-rc6/mm/memory_hotplug.c	2012-07-18 17:51:03.933189930 +0900
@@ -1012,9 +1012,9 @@  int offline_memory(u64 start, u64 size)
 	return offline_pages(start_pfn, end_pfn, 120 * HZ);
 }
 
-int remove_memory(int nid, u64 start, u64 size)
+int __ref remove_memory(int nid, u64 start, u64 size)
 {
-	int ret = -EBUSY;
+	int ret = 0;
 	lock_memory_hotplug();
 	/*
 	 * The memory might become online by other task, even if you offine it.
@@ -1025,8 +1025,13 @@  int remove_memory(int nid, u64 start, u6
 			"because the memmory range is online\n",
 			start, start + size);
 		ret = -EAGAIN;
+		goto out;
 	}
 
+	/* remove memmap entry */
+	firmware_map_remove(start, start + size, "System RAM");
+
+out:
 	unlock_memory_hotplug();
 	return ret;
 
Index: linux-3.5-rc6/include/linux/firmware-map.h
===================================================================
--- linux-3.5-rc6.orig/include/linux/firmware-map.h	2012-07-18 17:19:37.007382563 +0900
+++ linux-3.5-rc6/include/linux/firmware-map.h	2012-07-18 17:42:20.804730245 +0900
@@ -25,6 +25,7 @@ 
 
 int firmware_map_add_early(u64 start, u64 end, const char *type);
 int firmware_map_add_hotplug(u64 start, u64 end, const char *type);
+int firmware_map_remove(u64 start, u64 end, const char *type);
 
 #else /* CONFIG_FIRMWARE_MEMMAP */
 
@@ -38,6 +39,11 @@  static inline int firmware_map_add_hotpl
 	return 0;
 }
 
+static inline int firmware_map_remove(u64 start, u64 end, const char *type)
+{
+	return 0;
+}
+
 #endif /* CONFIG_FIRMWARE_MEMMAP */
 
 #endif /* _LINUX_FIRMWARE_MAP_H */
Index: linux-3.5-rc6/drivers/firmware/memmap.c
===================================================================
--- linux-3.5-rc6.orig/drivers/firmware/memmap.c	2012-07-18 17:19:43.618300182 +0900
+++ linux-3.5-rc6/drivers/firmware/memmap.c	2012-07-18 17:42:20.846729721 +0900
@@ -21,6 +21,7 @@ 
 #include <linux/types.h>
 #include <linux/bootmem.h>
 #include <linux/slab.h>
+#include <linux/mm.h>
 
 /*
  * Data types ------------------------------------------------------------------
@@ -79,7 +80,22 @@  static const struct sysfs_ops memmap_att
 	.show = memmap_attr_show,
 };
 
+#define to_memmap_entry(obj) container_of(obj, struct firmware_map_entry, kobj)
+
+static void release_firmware_map_entry(struct kobject *kobj)
+{
+	struct firmware_map_entry *entry = to_memmap_entry(kobj);
+	struct page *page;
+
+	page = virt_to_page(entry);
+	if (PageSlab(page) || PageCompound(page))
+		kfree(entry);
+
+	/* There is no way to free memory allocated from bootmem*/
+}
+
 static struct kobj_type memmap_ktype = {
+	.release	= release_firmware_map_entry,
 	.sysfs_ops	= &memmap_attr_ops,
 	.default_attrs	= def_attrs,
 };
@@ -123,6 +139,16 @@  static int firmware_map_add_entry(u64 st
 	return 0;
 }
 
+/**
+ * firmware_map_remove_entry() - Does the real work to remove a firmware
+ * memmap entry.
+ * @entry: removed entry.
+ **/
+static inline void firmware_map_remove_entry(struct firmware_map_entry *entry)
+{
+	list_del(&entry->list);
+}
+
 /*
  * Add memmap entry on sysfs
  */
@@ -144,6 +170,31 @@  static int add_sysfs_fw_map_entry(struct
 	return 0;
 }
 
+/*
+ * Remove memmap entry on sysfs
+ */
+static inline void remove_sysfs_fw_map_entry(struct firmware_map_entry *entry)
+{
+	kobject_put(&entry->kobj);
+}
+
+/*
+ * Search memmap entry
+ */
+
+struct firmware_map_entry * __meminit
+find_firmware_map_entry(u64 start, u64 end, const char *type)
+{
+	struct firmware_map_entry *entry;
+
+	list_for_each_entry(entry, &map_entries, list)
+		if ((entry->start == start) && (entry->end == end) &&
+		    (!strcmp(entry->type, type)))
+			return entry;
+
+	return NULL;
+}
+
 /**
  * firmware_map_add_hotplug() - Adds a firmware mapping entry when we do
  * memory hotplug.
@@ -196,6 +247,32 @@  int __init firmware_map_add_early(u64 st
 	return firmware_map_add_entry(start, end, type, entry);
 }
 
+/**
+ * firmware_map_remove() - remove a firmware mapping entry
+ * @start: Start of the memory range.
+ * @end:   End of the memory range.
+ * @type:  Type of the memory range.
+ *
+ * removes a firmware mapping entry.
+ *
+ * Returns 0 on success, or -EINVAL if no entry.
+ **/
+int __meminit firmware_map_remove(u64 start, u64 end, const char *type)
+{
+	struct firmware_map_entry *entry;
+
+	entry = find_firmware_map_entry(start, end - 1, type);
+	if (!entry)
+		return -EINVAL;
+
+	firmware_map_remove_entry(entry);
+
+	/* remove the memmap entry */
+	remove_sysfs_fw_map_entry(entry);
+
+	return 0;
+}
+
 /*
  * Sysfs functions -------------------------------------------------------------
  */
@@ -218,7 +295,6 @@  static ssize_t type_show(struct firmware
 }
 
 #define to_memmap_attr(_attr) container_of(_attr, struct memmap_attribute, attr)
-#define to_memmap_entry(obj) container_of(obj, struct firmware_map_entry, kobj)
 
 static ssize_t memmap_attr_show(struct kobject *kobj,
 				struct attribute *attr, char *buf)