[Crash-utility] [PATCH] Use address_space.__nrpages for RT kernel

[Dave Anderson]

Bernhard Walle wrote:
> The patch mapping_nrpages.patch from RT kernel
> 
>     Subject: mm/fs: abstract address_space::nrpages
>     
>     Currently the tree_lock protects mapping->nrpages, this will not be
>     possible much longer. Hence abstract the access to this variable so that
>     it can be easily replaced by an atomic_ulong_t.
>     
>     Signed-off-by: Peter Zijlstra <a.p.zijlstra at chello.nl>
> 
> renames address_space.nrpages to address_space.__nrpages. This patch implements
> that renaming for crash if address_space.nrpages is invalid.
> 
> 
> Signed-off-by: Bernhard Walle <bwalle at suse.de>
> 
> ---
>  memory.c |    3 +++
>  1 file changed, 3 insertions(+)
> 
> --- a/memory.c
> +++ b/memory.c
> @@ -320,6 +320,9 @@ vm_init(void)
>  	MEMBER_OFFSET_INIT(block_device_bd_disk, "block_device", "bd_disk");
>  	MEMBER_OFFSET_INIT(inode_i_mapping, "inode", "i_mapping");
>  	MEMBER_OFFSET_INIT(address_space_nrpages, "address_space", "nrpages");
> +	if (INVALID_MEMBER(address_space_nrpages))
> +		MEMBER_OFFSET_INIT(address_space_nrpages, "address_space", "__nrpages");
> +
>  	MEMBER_OFFSET_INIT(gendisk_major, "gendisk", "major");
>  	MEMBER_OFFSET_INIT(gendisk_fops, "gendisk", "fops");
>  	MEMBER_OFFSET_INIT(gendisk_disk_name, "gendisk", "disk_name");
> 
> --

No problem here -- queued for the next release.

Thanks,
   Dave