[PATCH 7/11] x86_64 ia32 vDSO: define arch_vma_name

[Roland McGrath <roland@redhat.com>]

This patch makes x86_64 define arch_vma_name for CONFIG_IA32_EMULATION.
This makes the ia32 vDSO mapping appear in /proc/PID/maps with "[vdso]"
for ia32 processes, as it does on native i386.

Signed-off-by: Roland McGrath <roland@redhat.com>
---
 arch/x86_64/ia32/syscall32.c |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/arch/x86_64/ia32/syscall32.c b/arch/x86_64/ia32/syscall32.c
index 3ac9355..59f1fa1 100644  
--- a/arch/x86_64/ia32/syscall32.c
+++ b/arch/x86_64/ia32/syscall32.c
@@ -82,6 +82,14 @@ int syscall32_setup_pages(struct linux_b
 	return 0;
 }
 
+const char *arch_vma_name(struct vm_area_struct *vma)
+{
+	if (vma->vm_start == VSYSCALL32_BASE &&
+	    vma->vm_mm && vma->vm_mm->task_size == IA32_PAGE_OFFSET)
+		return "[vdso]";
+	return NULL;
+}
+
 static int __init init_syscall32(void)
 { 
 	syscall32_page = (void *)get_zeroed_page(GFP_KERNEL);