From: Davidlohr Bueso <dave@xxxxxxxxxxxx>
This becomes quite straightforward with the mmrange in place.
Signed-off-by: Davidlohr Bueso <dbueso@xxxxxxx>
---
arch/unicore32/mm/fault.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/unicore32/mm/fault.c b/arch/unicore32/mm/fault.c
index dd35b6191798..f806ade79afd 100644
--- a/arch/unicore32/mm/fault.c
+++ b/arch/unicore32/mm/fault.c
@@ -233,12 +233,12 @@ static int do_pf(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
* validly references user space from well defined areas of the code,
* we can bug out early if this is from code which shouldn't.
*/
- if (!down_read_trylock(&mm->mmap_sem)) {
+ if (!mm_read_trylock(mm, &mmrange)) {
if (!user_mode(regs)
&& !search_exception_tables(regs->UCreg_pc))
goto no_context;
retry:
- down_read(&mm->mmap_sem);
+ mm_read_lock(mm, &mmrange);
} else {
/*
* The above down_read_trylock() might have succeeded in
@@ -275,7 +275,7 @@ static int do_pf(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
}
}
- up_read(&mm->mmap_sem);
+ mm_read_unlock(mm, &mmrange);
/*
* Handle the "normal" case first - VM_FAULT_MAJOR
--
2.13.6
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