Pass "true" to do_munmap() to not do unlock/relock to mmap_sem when
manipulating mpx map.
This is API change only.
Signed-off-by: Yang Shi <yang....@linux.alibaba.com>
Cc: Ricardo Neri <ricardo.neri-calde...@linux.intel.com>
Cc: Thomas Gleixner <t...@linutronix.de>
Cc: Ingo Molnar <mi...@redhat.com>
Cc: "H. Peter Anvin" <h...@zytor.com>
Cc: Borislav Petkov <b...@suse.de>
Cc: x...@kernel.org
---
arch/x86/mm/mpx.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/mm/mpx.c b/arch/x86/mm/mpx.c
index e500949..a180e94 100644
--- a/arch/x86/mm/mpx.c
+++ b/arch/x86/mm/mpx.c
@@ -780,7 +780,7 @@ static int unmap_entire_bt(struct mm_struct *mm,
* avoid recursion, do_munmap() will check whether it comes
* from one bounds table through VM_MPX flag.
*/
- return do_munmap(mm, bt_addr, mpx_bt_size_bytes(mm), NULL);
+ return do_munmap(mm, bt_addr, mpx_bt_size_bytes(mm), NULL, true);
}
static int try_unmap_single_bt(struct mm_struct *mm,
--
1.8.3.1
