4 files changed, 21 insertions, 11 deletions

diff --git a/arch/arm/kernel/head-nommu.S b/arch/arm/kernel/head-nommu.S
index 6b4eb27b8758..2e21e08de747 100644
--- a/arch/arm/kernel/head-nommu.S
+++ b/arch/arm/kernel/head-nommu.S
@@ -152,11 +152,6 @@ __after_proc_init:
 #ifdef CONFIG_CPU_ICACHE_DISABLE
 	bic	r0, r0, #CR_I
 #endif
-#ifdef CONFIG_CPU_HIGH_VECTOR
-	orr	r0, r0, #CR_V
-#else
-	bic	r0, r0, #CR_V
-#endif
 	mcr	p15, 0, r0, c1, c0, 0		@ write control reg
 #elif defined (CONFIG_CPU_V7M)
 	/* For V7M systems we want to modify the CCR similarly to the SCTLR */
diff --git a/arch/arm/kernel/module.c b/arch/arm/kernel/module.c
index 4f14b5ce6535..80254b47dc34 100644
--- a/arch/arm/kernel/module.c
+++ b/arch/arm/kernel/module.c
@@ -155,8 +155,17 @@ apply_relocate(Elf32_Shdr *sechdrs, const char *strtab, unsigned int symindex,
 		       break;
 
 		case R_ARM_PREL31:
-			offset = *(u32 *)loc + sym->st_value - loc;
-			*(u32 *)loc = offset & 0x7fffffff;
+			offset = (*(s32 *)loc << 1) >> 1; /* sign extend */
+			offset += sym->st_value - loc;
+			if (offset >= 0x40000000 || offset < -0x40000000) {
+				pr_err("%s: section %u reloc %u sym '%s': relocation %u out of range (%#lx -> %#x)\n",
+				       module->name, relindex, i, symname,
+				       ELF32_R_TYPE(rel->r_info), loc,
+				       sym->st_value);
+				return -ENOEXEC;
+			}
+			*(u32 *)loc &= 0x80000000;
+			*(u32 *)loc |= offset & 0x7fffffff;
 			break;
 
 		case R_ARM_MOVW_ABS_NC:
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index 34e3f3c45634..f4e54503afa9 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -81,7 +81,7 @@ __setup("fpe=", fpe_setup);
 extern void init_default_cache_policy(unsigned long);
 extern void paging_init(const struct machine_desc *desc);
 extern void early_paging_init(const struct machine_desc *);
-extern void sanity_check_meminfo(void);
+extern void adjust_lowmem_bounds(void);
 extern enum reboot_mode reboot_mode;
 extern void setup_dma_zone(const struct machine_desc *desc);
 
@@ -1093,8 +1093,14 @@ void __init setup_arch(char **cmdline_p)
 	setup_dma_zone(mdesc);
 	xen_early_init();
 	efi_init();
-	sanity_check_meminfo();
+	/*
+	 * Make sure the calculation for lowmem/highmem is set appropriately
+	 * before reserving/allocating any mmeory
+	 */
+	adjust_lowmem_bounds();
 	arm_memblock_init(mdesc);
+	/* Memory may have been removed so recalculate the bounds. */
+	adjust_lowmem_bounds();
 
 	early_ioremap_reset();
 
diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index 7dd14e8395e6..5a07c5a4b894 100644
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -251,7 +251,7 @@ void __cpu_die(unsigned int cpu)
 		pr_err("CPU%u: cpu didn't die\n", cpu);
 		return;
 	}
-	pr_notice("CPU%u: shutdown\n", cpu);
+	pr_debug("CPU%u: shutdown\n", cpu);
 
 	/*
 	 * platform_cpu_kill() is generally expected to do the powering off
@@ -371,7 +371,7 @@ asmlinkage void secondary_start_kernel(void)
 	 * reference and switch to it.
 	 */
 	cpu = smp_processor_id();
-	atomic_inc(&mm->mm_count);
+	mmgrab(mm);
 	current->active_mm = mm;
 	cpumask_set_cpu(cpu, mm_cpumask(mm));