3 files changed, 17 insertions, 5 deletions

diff --git a/arch/arm/mm/ioremap.c b/arch/arm/mm/ioremap.c
index ab506272b2d3..17e7b0b57e49 100644
--- a/arch/arm/mm/ioremap.c
+++ b/arch/arm/mm/ioremap.c
@@ -204,8 +204,12 @@ void __iomem * __arm_ioremap_pfn_caller(unsigned long pfn,
         /*
          * Don't allow RAM to be mapped - this causes problems with ARMv6+
          */
-        if (WARN_ON(pfn_valid(pfn)))
-                return NULL;
+        if (pfn_valid(pfn)) {
+                printk(KERN_WARNING "BUG: Your driver calls ioremap() on system memory.  This leads\n"
+                       KERN_WARNING "to architecturally unpredictable behaviour on ARMv6+, and ioremap()\n"
+                       KERN_WARNING "will fail in the next kernel release.  Please fix your driver.\n");
+                WARN_ON(1);
+        }
 
         type = get_mem_type(mtype);
         if (!type)
diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index 6a3a2d0cd6db..e8ed9dc461fe 100644
--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -248,7 +248,7 @@ static struct mem_type mem_types[] = {
         },
         [MT_MEMORY] = {
                 .prot_pte  = L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY |
-                                L_PTE_USER | L_PTE_EXEC,
+                                L_PTE_WRITE | L_PTE_EXEC,
                 .prot_l1   = PMD_TYPE_TABLE,
                 .prot_sect = PMD_TYPE_SECT | PMD_SECT_AP_WRITE,
                 .domain    = DOMAIN_KERNEL,
@@ -259,7 +259,7 @@ static struct mem_type mem_types[] = {
         },
         [MT_MEMORY_NONCACHED] = {
                 .prot_pte  = L_PTE_PRESENT | L_PTE_YOUNG | L_PTE_DIRTY |
-                                L_PTE_USER | L_PTE_EXEC | L_PTE_MT_BUFFERABLE,
+                                L_PTE_WRITE | L_PTE_EXEC | L_PTE_MT_BUFFERABLE,
                 .prot_l1   = PMD_TYPE_TABLE,
                 .prot_sect = PMD_TYPE_SECT | PMD_SECT_AP_WRITE,
                 .domain    = DOMAIN_KERNEL,
diff --git a/arch/arm/mm/proc-v7.S b/arch/arm/mm/proc-v7.S
index 7563ff0141bd..197f21bed5e9 100644
--- a/arch/arm/mm/proc-v7.S
+++ b/arch/arm/mm/proc-v7.S
@@ -253,6 +253,14 @@ __v7_setup:
         orreq   r10, r10, #1 << 22              @ set bit #22
         mcreq   p15, 0, r10, c15, c0, 1         @ write diagnostic register
 #endif
+#ifdef CONFIG_ARM_ERRATA_743622
+        teq     r6, #0x20                       @ present in r2p0
+        teqne   r6, #0x21                       @ present in r2p1
+        teqne   r6, #0x22                       @ present in r2p2
+        mrceq   p15, 0, r10, c15, c0, 1         @ read diagnostic register
+        orreq   r10, r10, #1 << 6               @ set bit #6
+        mcreq   p15, 0, r10, c15, c0, 1         @ write diagnostic register
+#endif
 
 3:      mov     r10, #0
 #ifdef HARVARD_CACHE
@@ -365,7 +373,7 @@ __v7_ca9mp_proc_info:
         b       __v7_ca9mp_setup
         .long   cpu_arch_name
         .long   cpu_elf_name
-        .long   HWCAP_SWP|HWCAP_HALF|HWCAP_THUMB|HWCAP_FAST_MULT|HWCAP_EDSP
+        .long   HWCAP_SWP|HWCAP_HALF|HWCAP_THUMB|HWCAP_FAST_MULT|HWCAP_EDSP|HWCAP_TLS
         .long   cpu_v7_name
         .long   v7_processor_functions
         .long   v7wbi_tlb_fns