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authorAmerigo Wang <amwang@redhat.com>2009-05-11 22:05:28 -0400
committerIngo Molnar <mingo@elte.hu>2009-05-12 11:13:45 +0200
commit9d62dcdfa6f6fc843f7d9b494bcd48f00b94f883 (patch)
treec319c1053b2b72b4d5eb29f87995f0e93c3ada51 /arch/x86/kernel/process.c
parent087fa4e964e04371a67f340e1f6ac92c5db5e0a6 (diff)
x86: merge process.c a bit
Merge arch_align_stack() and arch_randomize_brk(), since they are the same. Tested on x86_64. [ Impact: cleanup ] Signed-off-by: Amerigo Wang <amwang@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/process.c')
-rw-r--r--arch/x86/kernel/process.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index ca989158e84..2b9a8d0fb47 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -8,6 +8,7 @@
#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>
@@ -613,3 +614,16 @@ 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;
+}
+