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authorStephen Wilson <wilsons@start.ca>2011-03-13 15:49:20 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2011-03-23 16:36:57 -0400
commit5ddd36b9c59887c6416e21daf984fbdd9b1818df (patch)
tree1cc7ce9a671f4c49dc594e1f5d1fc8b596e77b5f /mm/memory.c
parent206cb636576b969e9b471cdedeaea7752e6acb33 (diff)
downloadlinux-5ddd36b9c59887c6416e21daf984fbdd9b1818df.tar.bz2
mm: implement access_remote_vm
Provide an alternative to access_process_vm that allows the caller to obtain a reference to the supplied mm_struct. Signed-off-by: Stephen Wilson <wilsons@start.ca> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'mm/memory.c')
-rw-r--r--mm/memory.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/mm/memory.c b/mm/memory.c
index 820b4c4810f0..468f5076754c 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -3711,6 +3711,22 @@ static int __access_remote_vm(struct task_struct *tsk, struct mm_struct *mm,
return buf - old_buf;
}
+/**
+ * @access_remote_vm - access another process' address space
+ * @mm: the mm_struct of the target address space
+ * @addr: start address to access
+ * @buf: source or destination buffer
+ * @len: number of bytes to transfer
+ * @write: whether the access is a write
+ *
+ * The caller must hold a reference on @mm.
+ */
+int access_remote_vm(struct mm_struct *mm, unsigned long addr,
+ void *buf, int len, int write)
+{
+ return __access_remote_vm(NULL, mm, addr, buf, len, write);
+}
+
/*
* Access another process' address space.
* Source/target buffer must be kernel space,