Merge branch 'linus' into tracing/hw-breakpoints

[~andy/linux] / arch / x86 / kernel / process.c

diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index 19a686c401b56a4209acc34aaa2104754cddbe72..fc6e4b773fc49410b56d44cb7734c31c9d3b3288 100644 (file)
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -8,9 +8,11 @@
 #include <linux/module.h>
 #include <linux/pm.h>
 #include <linux/clockchips.h>
+#include <linux/random.h>
 #include <trace/power.h>
 #include <asm/system.h>
 #include <asm/apic.h>
+#include <asm/syscalls.h>
 #include <asm/idle.h>
 #include <asm/uaccess.h>
 #include <asm/i387.h>
@@ -65,7 +67,7 @@ void arch_task_cache_init(void)
         task_xstate_cachep =
                kmem_cache_create("task_xstate", xstate_size,
                                  __alignof__(union thread_xstate),
-                                 SLAB_PANIC, NULL);
+                                 SLAB_PANIC | SLAB_NOTRACK, NULL);
 }
 
 /*
@@ -604,3 +606,16 @@ static int __init idle_setup(char *str)
 }
 early_param("idle", idle_setup);
 
+unsigned long arch_align_stack(unsigned long sp)
+{
+       if (!(current->personality & ADDR_NO_RANDOMIZE) && randomize_va_space)
+               sp -= get_random_int() % 8192;
+       return sp & ~0xf;
+}
+
+unsigned long arch_randomize_brk(struct mm_struct *mm)
+{
+       unsigned long range_end = mm->brk + 0x02000000;
+       return randomize_range(mm->brk, range_end, 0) ? : mm->brk;
+}
+