On Mon, 19 Jul 2010 22:53:58 -0500
Nathan Fontenot <nf...@austin.ibm.com> wrote:

> Add a section count property to the memory_block struct to track the number
> of memory sections that have been added/removed from a emory block.
> 
> Signed-off-by: Nathan Fontenot <nf...@asutin.ibm.com>
> ---
>  drivers/base/memory.c  |   19 ++++++++++++-------
>  include/linux/memory.h |    2 ++
>  2 files changed, 14 insertions(+), 7 deletions(-)
> 
> Index: linux-2.6/drivers/base/memory.c
> ===================================================================
> --- linux-2.6.orig/drivers/base/memory.c      2010-07-19 20:43:49.000000000 
> -0500
> +++ linux-2.6/drivers/base/memory.c   2010-07-19 20:44:01.000000000 -0500
> @@ -487,6 +487,7 @@ static int add_memory_block(int nid, str
>  
>       mem->start_phys_index = __section_nr(section);
>       mem->state = state;
> +     atomic_inc(&mem->section_count);
>       mutex_init(&mem->state_mutex);
>       start_pfn = section_nr_to_pfn(mem->start_phys_index);
>       mem->phys_device = arch_get_memory_phys_device(start_pfn);
> @@ -516,13 +517,17 @@ int remove_memory_block(unsigned long no
>       struct memory_block *mem;
>  
>       mem = find_memory_block(section);
> -     unregister_mem_sect_under_nodes(mem);
> -     mem_remove_simple_file(mem, start_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);
> -     unregister_memory(mem, section);
> +     atomic_dec(&mem->section_count);
> +
> +     if (atomic_read(&mem->section_count) == 0) {

We use atomic_dec_and_test() in usual.

Otherwise, I don't see other problems in other part. Please fix this nitpick.

Regards,
-Kame


_______________________________________________
Linuxppc-dev mailing list
Linuxppc-dev@lists.ozlabs.org
https://lists.ozlabs.org/listinfo/linuxppc-dev

Reply via email to