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Commit 9d62dcdf authored by Amerigo Wang's avatar Amerigo Wang Committed by Ingo Molnar
Browse files

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: default avatarAmerigo Wang <amwang@redhat.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 087fa4e9

arch/x86/kernel/process.c

+14 −0
Original line number Diff line number Diff line
@@ -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;

}

arch/x86/kernel/process_32.c

+0 −13
Original line number Diff line number Diff line
@@ -33,7 +33,6 @@ 
#include <linux/module.h>

#include <linux/kallsyms.h>

#include <linux/ptrace.h>

#include <linux/random.h>

#include <linux/personality.h>

#include <linux/tick.h>

#include <linux/percpu.h>
@@ -497,15 +496,3 @@ unsigned long get_wchan(struct task_struct *p) 
	return 0;

}

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;

}

arch/x86/kernel/process_64.c

+0 −13
Original line number Diff line number Diff line
@@ -32,7 +32,6 @@ 
#include <linux/delay.h>

#include <linux/module.h>

#include <linux/ptrace.h>

#include <linux/random.h>

#include <linux/notifier.h>

#include <linux/kprobes.h>

#include <linux/kdebug.h>
@@ -660,15 +659,3 @@ long sys_arch_prctl(int code, unsigned long addr) 
	return do_arch_prctl(current, code, addr);

}

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;

}