xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

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

Browse Source 
Morally, the presence of a gate vma is more an attribute of a particular mm than
a particular task.  Moreover, dropping the dependency on task_struct will help
make both existing and future operations on mm's more flexible and convenient.

Signed-off-by: Stephen Wilson <wilsons@start.ca>
Reviewed-by: Michel 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: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Stephen Wilson
2011-03-13 15:49:15 -04:00
committed by Al Viro
parent 375906f876
commit 31db58b3ab
10 changed files with 23 additions and 20 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
arch/x86/vdso/vdso32-setup.c
View File

@@ -417,11 +417,12 @@ const char *arch_vma_name(struct vm_area_struct *vma)
return NULL;
}
struct vm_area_struct *get_gate_vma(struct task_struct *tsk)
struct vm_area_struct *get_gate_vma(struct mm_struct *mm)
{
struct mm_struct *mm = tsk->mm;
/* Check to see if this task was created in compat vdso mode */
/*
* Check to see if the corresponding task was created in compat vdso
* mode.
*/
if (mm && mm->context.vdso == (void *)VDSO_HIGH_BASE)
return &gate_vma;
return NULL;
@@ -429,7 +430,7 @@ struct vm_area_struct *get_gate_vma(struct task_struct *tsk)
int in_gate_area(struct task_struct *task, unsigned long addr)
{
const struct vm_area_struct *vma = get_gate_vma(task);
const struct vm_area_struct *vma = get_gate_vma(task->mm);
return vma && addr >= vma->vm_start && addr < vma->vm_end;
}