[PATCH] refactor capable() to one implementation, add __capable() helper

Move capable() to kernel/capability.c and eliminate duplicate
implementations.  Add __capable() function which can be used to check for
capabiilty of any process.

Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 16 insertions, 0 deletions

diff --git a/kernel/capability.c b/kernel/capability.c
index bfa3c92e16f2..1a4d8a40d3f9 100644
--- a/kernel/capability.c
+++ b/kernel/capability.c
@@ -233,3 +233,19 @@ out:
 
      return ret;
 }
+
+int __capable(struct task_struct *t, int cap)
+{
+	if (security_capable(t, cap) == 0) {
+		t->flags |= PF_SUPERPRIV;
+		return 1;
+	}
+	return 0;
+}
+EXPORT_SYMBOL(__capable);
+
+int capable(int cap)
+{
+	return __capable(current, cap);
+}
+EXPORT_SYMBOL(capable);