Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

include/linux/securebits.h

@@ -0,0 +1,30 @@
+#ifndef _LINUX_SECUREBITS_H
+#define _LINUX_SECUREBITS_H 1
+
+#define SECUREBITS_DEFAULT 0x00000000
+
+extern unsigned securebits;
+
+/* When set UID 0 has no special privileges. When unset, we support
+   inheritance of root-permissions and suid-root executable under
+   compatibility mode. We raise the effective and inheritable bitmasks
+   *of the executable file* if the effective uid of the new process is
+   0. If the real uid is 0, we raise the inheritable bitmask of the
+   executable file. */
+#define SECURE_NOROOT            0
+
+/* When set, setuid to/from uid 0 does not trigger capability-"fixes"
+   to be compatible with old programs relying on set*uid to loose
+   privileges. When unset, setuid doesn't change privileges. */
+#define SECURE_NO_SETUID_FIXUP   2
+
+/* Each securesetting is implemented using two bits. One bit specify
+   whether the setting is on or off. The other bit specify whether the
+   setting is fixed or not. A setting which is fixed cannot be changed
+   from user-level. */
+
+#define issecure(X) ( (1 << (X+1)) & SECUREBITS_DEFAULT ? 	\
+		      (1 << (X)) & SECUREBITS_DEFAULT :		\
+		      (1 << (X)) & securebits )
+
+#endif /* !_LINUX_SECUREBITS_H */