[PATCH] ARM: Add top_pmd, which points at the top-most page table

Signed-off-by: Russell King <rmk@arm.linux.org.uk>

arch/arm/mm/mm-armv.c

diff --git a/arch/arm/mm/mm-armv.c b/arch/arm/mm/mm-armv.c
index 2a514b0..fa60fd6 100644
--- a/arch/arm/mm/mm-armv.c
+++ b/arch/arm/mm/mm-armv.c
@@ -37,6 +37,8 @@
 
 EXPORT_SYMBOL(pgprot_kernel);
 
+pmd_t *top_pmd;
+
 struct cachepolicy {
 	const char	policy[16];
 	unsigned int	cr_mask;
@@ -682,6 +684,8 @@
 
 	flush_cache_all();
 	flush_tlb_all();
+
+	top_pmd = pmd_off_k(VECTORS_HIGH);
 }
 
 /*

include/asm-arm/page.h

diff --git a/include/asm-arm/page.h b/include/asm-arm/page.h
index 4ca3a8e..d26d157 100644
--- a/include/asm-arm/page.h
+++ b/include/asm-arm/page.h
@@ -171,6 +171,9 @@
 
 #endif /* STRICT_MM_TYPECHECKS */
 
+/* the upper-most page table pointer */
+extern pmd_t *top_pmd;
+
 /* Pure 2^n version of get_order */
 static inline int get_order(unsigned long size)
 {