[PATCH] auxiliary vector cleanups

The size of auxiliary vector is fixed at 42 in linux/sched.h.  But it isn't
very obvious when looking at linux/elf.h.  This patch adds AT_VECTOR_SIZE
so that we can change it if necessary when a new vector is added.

Because of include file ordering problems, doing this necessitated the
extraction of the AT_* symbols into a standalone header file.

Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 19 insertions, 0 deletions

diff --git a/include/asm-ppc64/auxvec.h b/include/asm-ppc64/auxvec.h
new file mode 100644
index 000000000000..ac6381a106e1
--- /dev/null
+++ b/include/asm-ppc64/auxvec.h
@@ -0,0 +1,19 @@
+#ifndef __PPC64_AUXVEC_H
+#define __PPC64_AUXVEC_H
+
+/*
+ * We need to put in some extra aux table entries to tell glibc what
+ * the cache block size is, so it can use the dcbz instruction safely.
+ */
+#define AT_DCACHEBSIZE          19
+#define AT_ICACHEBSIZE          20
+#define AT_UCACHEBSIZE          21
+/* A special ignored type value for PPC, for glibc compatibility.  */
+#define AT_IGNOREPPC            22
+
+/* The vDSO location. We have to use the same value as x86 for glibc's
+ * sake :-)
+ */
+#define AT_SYSINFO_EHDR         33
+
+#endif /* __PPC64_AUXVEC_H */