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@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@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
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Use address_space.__nrpages for RT kernel
