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Commit 83b964bb authored by Stephen Wilson's avatar Stephen Wilson Committed by Al Viro
Browse files

mm: arch: make in_gate_area take an mm_struct instead of a task_struct 



Morally, the question of whether an address lies in a gate vma should be asked
with respect to an mm, not a particular task.  Moreover, dropping the dependency
on task_struct will help make existing and future operations on mm's more
flexible and convenient.

Signed-off-by: default avatarStephen Wilson <wilsons@start.ca>
Reviewed-by: default avatarMichel Lespinasse <walken@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 31db58b3

arch/powerpc/kernel/vdso.c

+1 −1
Original line number Diff line number Diff line
@@ -825,7 +825,7 @@ int in_gate_area_no_task(unsigned long addr) 
	return 0;

}



int in_gate_area(struct task_struct *task, unsigned long addr)

int in_gate_area(struct mm_struct *mm, unsigned long addr)

{

	return 0;

}

arch/s390/kernel/vdso.c

+1 −1
Original line number Diff line number Diff line
@@ -342,7 +342,7 @@ int in_gate_area_no_task(unsigned long addr) 
	return 0;

}



int in_gate_area(struct task_struct *task, unsigned long addr)

int in_gate_area(struct mm_struct *mm, unsigned long addr)

{

	return 0;

}

arch/sh/kernel/vsyscall/vsyscall.c

+1 −1
Original line number Diff line number Diff line
@@ -99,7 +99,7 @@ struct vm_area_struct *get_gate_vma(struct mm_struct *mm) 
	return NULL;

}



int in_gate_area(struct task_struct *task, unsigned long address)

int in_gate_area(struct mm_struct *mm, unsigned long address)

{

	return 0;

}

arch/x86/mm/init_64.c

+2 −2
Original line number Diff line number Diff line
@@ -870,9 +870,9 @@ struct vm_area_struct *get_gate_vma(struct mm_struct *mm) 
	return &gate_vma;

}



int in_gate_area(struct task_struct *task, unsigned long addr)

int in_gate_area(struct mm_struct *mm, unsigned long addr)

{

	struct vm_area_struct *vma = get_gate_vma(task->mm);

	struct vm_area_struct *vma = get_gate_vma(mm);



	if (!vma)

		return 0;

arch/x86/vdso/vdso32-setup.c

+2 −2
Original line number Diff line number Diff line
@@ -428,9 +428,9 @@ struct vm_area_struct *get_gate_vma(struct mm_struct *mm) 
	return NULL;

}



int in_gate_area(struct task_struct *task, unsigned long addr)

int in_gate_area(struct mm_struct *mm, unsigned long addr)

{

	const struct vm_area_struct *vma = get_gate_vma(task->mm);

	const struct vm_area_struct *vma = get_gate_vma(mm);



	return vma && addr >= vma->vm_start && addr < vma->vm_end;

}