From: Grazvydas Ignotas <notasas@gmail.com>
Date: Sat, 27 Feb 2016 16:32:15 +0000 (+0200)
Subject: arm: don't limit mmap at address 0
X-Git-Tag: sz_174~1
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?p=pandora-kernel.git;a=commitdiff_plain;h=05d5f6e1127de5b7b244d200b9245985276f602e

arm: don't limit mmap at address 0

Pandora's Cortex-A8 uses high vectors, so we can map there -
might be useful for some emulators.
---

diff --git a/arch/arm/include/asm/pgtable.h b/arch/arm/include/asm/pgtable.h
index b1e71b48edc1..1ce99a73e18c 100644
--- a/arch/arm/include/asm/pgtable.h
+++ b/arch/arm/include/asm/pgtable.h
@@ -63,6 +63,12 @@ extern void __pgd_error(const char *file, int line, pgd_t);
  */
 #define FIRST_USER_ADDRESS	PAGE_SIZE
 
+/* OMAP hack - high vector CPUs, so don't limit it */
+#ifdef CONFIG_ARCH_OMAP
+#undef FIRST_USER_ADDRESS
+#define FIRST_USER_ADDRESS	0
+#endif
+
 /*
  * The pgprot_* and protection_map entries will be fixed up in runtime
  * to include the cachable and bufferable bits based on memory policy,