summaryrefslogtreecommitdiff
path: root/kernel/compat.c
diff options
context:
space:
mode:
authorStephen Rothwell <sfr@canb.auug.org.au>2006-11-02 22:07:24 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-11-03 12:27:59 -0800
commit3fd593979802f81ff6452596ac61e3840f917589 (patch)
tree9ce40cdd152502426e5a7161f93a248f1da4d1fc /kernel/compat.c
parent1f6f61649d8c64d7a3a4d143405df9a7bdd4af10 (diff)
downloadlinux-sh-3fd593979802f81ff6452596ac61e3840f917589.tar.gz
[PATCH] Create compat_sys_migrate_pages
This is needed on bigendian 64bit architectures. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Acked-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel/compat.c')
-rw-r--r--kernel/compat.c33
1 files changed, 33 insertions, 0 deletions
diff --git a/kernel/compat.c b/kernel/compat.c
index d4898aad6cfa..6952dd057300 100644
--- a/kernel/compat.c
+++ b/kernel/compat.c
@@ -982,4 +982,37 @@ asmlinkage long compat_sys_move_pages(pid_t pid, unsigned long nr_pages,
}
return sys_move_pages(pid, nr_pages, pages, nodes, status, flags);
}
+
+asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
+ compat_ulong_t maxnode,
+ const compat_ulong_t __user *old_nodes,
+ const compat_ulong_t __user *new_nodes)
+{
+ unsigned long __user *old = NULL;
+ unsigned long __user *new = NULL;
+ nodemask_t tmp_mask;
+ unsigned long nr_bits;
+ unsigned long size;
+
+ nr_bits = min_t(unsigned long, maxnode - 1, MAX_NUMNODES);
+ size = ALIGN(nr_bits, BITS_PER_LONG) / 8;
+ if (old_nodes) {
+ if (compat_get_bitmap(nodes_addr(tmp_mask), old_nodes, nr_bits))
+ return -EFAULT;
+ old = compat_alloc_user_space(new_nodes ? size * 2 : size);
+ if (new_nodes)
+ new = old + size / sizeof(unsigned long);
+ if (copy_to_user(old, nodes_addr(tmp_mask), size))
+ return -EFAULT;
+ }
+ if (new_nodes) {
+ if (compat_get_bitmap(nodes_addr(tmp_mask), new_nodes, nr_bits))
+ return -EFAULT;
+ if (new == NULL)
+ new = compat_alloc_user_space(size);
+ if (copy_to_user(new, nodes_addr(tmp_mask), size))
+ return -EFAULT;
+ }
+ return sys_migrate_pages(pid, nr_bits + 1, old, new);
+}
#endif