[S390] 1K/2K page table pages.

This patch implements 1K/2K page table pages for s390.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/include/asm-s390/elf.h b/include/asm-s390/elf.h
index b73a424d0f97..8181ca5b98f4 100644
--- a/include/asm-s390/elf.h
+++ b/include/asm-s390/elf.h
@@ -115,6 +115,7 @@ typedef s390_regs elf_gregset_t;
 
 #include <linux/sched.h>        /* for task_struct */
 #include <asm/system.h>         /* for save_access_regs */
+#include <asm/mmu_context.h>
 
 /*
  * This is used to ensure we don't load something for the wrong architecture.
@@ -214,4 +215,16 @@ do {							\
 } while (0)
 #endif /* __s390x__ */
 
+/*
+ * An executable for which elf_read_implies_exec() returns TRUE will
+ * have the READ_IMPLIES_EXEC personality flag set automatically.
+ */
+#define elf_read_implies_exec(ex, executable_stack)     \
+({                                                      \
+        if (current->mm->context.noexec &&              \
+            executable_stack != EXSTACK_DISABLE_X)      \
+                disable_noexec(current->mm, current);   \
+        current->mm->context.noexec == 0;               \
+})
+
 #endif