[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>

3 files changed, 35 insertions, 24 deletions

diff --git a/include/linux/auxvec.h b/include/linux/auxvec.h
new file mode 100644
index 000000000000..9a7b374c9fb4
--- /dev/null
+++ b/include/linux/auxvec.h
@@ -0,0 +1,31 @@
+#ifndef _LINUX_AUXVEC_H
+#define _LINUX_AUXVEC_H
+
+#include <asm/auxvec.h>
+
+/* Symbolic values for the entries in the auxiliary table
+   put on the initial stack */
+#define AT_NULL   0     /* end of vector */
+#define AT_IGNORE 1     /* entry should be ignored */
+#define AT_EXECFD 2     /* file descriptor of program */
+#define AT_PHDR   3     /* program headers for program */
+#define AT_PHENT  4     /* size of program header entry */
+#define AT_PHNUM  5     /* number of program headers */
+#define AT_PAGESZ 6     /* system page size */
+#define AT_BASE   7     /* base address of interpreter */
+#define AT_FLAGS  8     /* flags */
+#define AT_ENTRY  9     /* entry point of program */
+#define AT_NOTELF 10    /* program is not ELF */
+#define AT_UID    11    /* real uid */
+#define AT_EUID   12    /* effective uid */
+#define AT_GID    13    /* real gid */
+#define AT_EGID   14    /* effective gid */
+#define AT_PLATFORM 15  /* string identifying CPU for optimizations */
+#define AT_HWCAP  16    /* arch dependent hints at CPU capabilities */
+#define AT_CLKTCK 17    /* frequency at which times() increments */
+
+#define AT_SECURE 23   /* secure mode boolean */
+
+#define AT_VECTOR_SIZE  42 /* Size of auxiliary table.  */
+
+#endif /* _LINUX_AUXVEC_H */
diff --git a/include/linux/elf.h b/include/linux/elf.h
index f5b3ba5a317d..ff955dbf510d 100644
--- a/include/linux/elf.h
+++ b/include/linux/elf.h
@@ -2,6 +2,7 @@
 #define _LINUX_ELF_H
 
 #include <linux/types.h>
+#include <linux/auxvec.h>
 #include <asm/elf.h>
 
 #ifndef elf_read_implies_exec
@@ -158,29 +159,6 @@ typedef __s64	Elf64_Sxword;
 #define ELF64_ST_BIND(x)        ELF_ST_BIND(x)
 #define ELF64_ST_TYPE(x)        ELF_ST_TYPE(x)
 
-/* Symbolic values for the entries in the auxiliary table
-   put on the initial stack */
-#define AT_NULL   0     /* end of vector */
-#define AT_IGNORE 1     /* entry should be ignored */
-#define AT_EXECFD 2     /* file descriptor of program */
-#define AT_PHDR   3     /* program headers for program */
-#define AT_PHENT  4     /* size of program header entry */
-#define AT_PHNUM  5     /* number of program headers */
-#define AT_PAGESZ 6     /* system page size */
-#define AT_BASE   7     /* base address of interpreter */
-#define AT_FLAGS  8     /* flags */
-#define AT_ENTRY  9     /* entry point of program */
-#define AT_NOTELF 10    /* program is not ELF */
-#define AT_UID    11    /* real uid */
-#define AT_EUID   12    /* effective uid */
-#define AT_GID    13    /* real gid */
-#define AT_EGID   14    /* effective gid */
-#define AT_PLATFORM 15  /* string identifying CPU for optimizations */
-#define AT_HWCAP  16    /* arch dependent hints at CPU capabilities */
-#define AT_CLKTCK 17    /* frequency at which times() increments */
-
-#define AT_SECURE 23   /* secure mode boolean */
-
 typedef struct dynamic{
   Elf32_Sword d_tag;
   union{
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 5fb31bede103..b5a22ea80045 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -35,6 +35,8 @@
 #include <linux/topology.h>
 #include <linux/seccomp.h>
 
+#include <linux/auxvec.h>       /* For AT_VECTOR_SIZE */
+
 struct exec_domain;
 
 /*
@@ -261,7 +263,7 @@ struct mm_struct {
         mm_counter_t _rss;
         mm_counter_t _anon_rss;
 
-        unsigned long saved_auxv[42]; /* for /proc/PID/auxv */
+        unsigned long saved_auxv[AT_VECTOR_SIZE]; /* for /proc/PID/auxv */
 
         unsigned dumpable:2;
         cpumask_t cpu_vm_mask;