| From | Davidlohr Bueso <> | Subject | [PATCH 50/64] arch/unicore32: use mm locking wrappers | Date | Mon, 5 Feb 2018 02:27:40 +0100 |
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From: Davidlohr Bueso <dave@stgolabs.net>
This becomes quite straightforward with the mmrange in place.
Signed-off-by: Davidlohr Bueso <dbueso@suse.de> --- 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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