Re: [PATCH v2 06/35] nds32: MMU fault handling and page table management
From: Al Viro <viro@ZenIV.linux.org.uk>
Date: 2017-12-07 16:40:55
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linux-arch, linux-devicetree, linux-serial, lkml
On Mon, Nov 27, 2017 at 08:27:53PM +0800, Greentime Hu wrote:
+void do_page_fault(unsigned long entry, unsigned long addr, + unsigned int error_code, struct pt_regs *regs)
[snip]
+ /* + * If we're in an interrupt or have no user + * context, we must not take the fault.. + */ + if (unlikely(in_atomic() || !mm))
Broken. in_atomic() is wrong here - it should be faulthandler_disabled().