From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from gate.crashing.org (gate.crashing.org [63.228.1.57]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 3xC4Ms1fg7zDrMZ for ; Wed, 19 Jul 2017 14:50:16 +1000 (AEST) From: Benjamin Herrenschmidt To: linuxppc-dev@lists.ozlabs.org Cc: aneesh.kumar@linux.vnet.ibm.com, Benjamin Herrenschmidt Subject: [PATCH 01/24] powerpc/mm: Move exception_enter/exit to a do_page_fault wrapper Date: Wed, 19 Jul 2017 14:49:23 +1000 Message-Id: <20170719044946.22030-1-benh@kernel.crashing.org> List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , This will allow simplifying the returns from do_page_fault Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/mm/fault.c | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-) diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c index 4c422632047b..faddc87d0205 100644 --- a/arch/powerpc/mm/fault.c +++ b/arch/powerpc/mm/fault.c @@ -195,10 +195,9 @@ static int mm_fault_error(struct pt_regs *regs, unsigned long addr, int fault) * The return value is 0 if the fault was handled, or the signal * number if this is a kernel fault that can't be handled here. */ -int do_page_fault(struct pt_regs *regs, unsigned long address, - unsigned long error_code) +static int __do_page_fault(struct pt_regs *regs, unsigned long address, + unsigned long error_code) { - enum ctx_state prev_state = exception_enter(); struct vm_area_struct * vma; struct mm_struct *mm = current->mm; unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE; @@ -523,6 +522,15 @@ int do_page_fault(struct pt_regs *regs, unsigned long address, rc = SIGSEGV; bail: + return rc; +} +NOKPROBE_SYMBOL(__do_page_fault); + +int do_page_fault(struct pt_regs *regs, unsigned long address, + unsigned long error_code) +{ + enum ctx_state prev_state = exception_enter(); + int rc = __do_page_fault(regs, address, error_code); exception_exit(prev_state); return rc; } -- 2.13.3