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-rw-r--r--arch/arm/kernel/process.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index 566d0d71a1e7..1e6c33d01c05 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -426,6 +426,7 @@ unsigned long arch_randomize_brk(struct mm_struct *mm)
426} 426}
427 427
428#ifdef CONFIG_MMU 428#ifdef CONFIG_MMU
429#ifdef CONFIG_KUSER_HELPERS
429/* 430/*
430 * The vectors page is always readable from user space for the 431 * The vectors page is always readable from user space for the
431 * atomic helpers. Insert it into the gate_vma so that it is visible 432 * atomic helpers. Insert it into the gate_vma so that it is visible
@@ -458,10 +459,14 @@ int in_gate_area_no_mm(unsigned long addr)
458{ 459{
459 return in_gate_area(NULL, addr); 460 return in_gate_area(NULL, addr);
460} 461}
462#define is_gate_vma(vma) ((vma) = &gate_vma)
463#else
464#define is_gate_vma(vma) 0
465#endif
461 466
462const char *arch_vma_name(struct vm_area_struct *vma) 467const char *arch_vma_name(struct vm_area_struct *vma)
463{ 468{
464 return (vma == &gate_vma) ? "[vectors]" : 469 return is_gate_vma(vma) ? "[vectors]" :
465 (vma->vm_mm && vma->vm_start == vma->vm_mm->context.sigpage) ? 470 (vma->vm_mm && vma->vm_start == vma->vm_mm->context.sigpage) ?
466 "[sigpage]" : NULL; 471 "[sigpage]" : NULL;
467} 472}