linux-kernel - [PATCH 51/64] arch/mn10300: use mm locking wrappers

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Date:   Mon,  5 Feb 2018 02:27:41 +0100
From:   Davidlohr Bueso <dbueso@...e.de>
To:     akpm@...ux-foundation.org, mingo@...nel.org
Cc:     peterz@...radead.org, ldufour@...ux.vnet.ibm.com, jack@...e.cz,
        mhocko@...nel.org, kirill.shutemov@...ux.intel.com,
        mawilcox@...rosoft.com, mgorman@...hsingularity.net,
        dave@...olabs.net, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, Davidlohr Bueso <dbueso@...e.de>
Subject: [PATCH 51/64] arch/mn10300: use mm locking wrappers

From: Davidlohr Bueso <dave@...olabs.net>

This becomes quite straightforward with the mmrange in place.

Signed-off-by: Davidlohr Bueso <dbueso@...e.de>
---
 arch/mn10300/mm/fault.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/arch/mn10300/mm/fault.c b/arch/mn10300/mm/fault.c
index 71c38f0c8702..cd973bd02259 100644
--- a/arch/mn10300/mm/fault.c
+++ b/arch/mn10300/mm/fault.c
@@ -175,7 +175,7 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long fault_code,
 	if ((fault_code & MMUFCR_xFC_ACCESS) == MMUFCR_xFC_ACCESS_USR)
 		flags |= FAULT_FLAG_USER;
 retry:
-	down_read(&mm->mmap_sem);
+	mm_read_lock(mm, &mmrange);
 
 	vma = find_vma(mm, address);
 	if (!vma)
@@ -286,7 +286,7 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long fault_code,
 		}
 	}
 
-	up_read(&mm->mmap_sem);
+	mm_read_unlock(mm, &mmrange);
 	return;
 
 /*
@@ -294,7 +294,7 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long fault_code,
  * Fix it, but check if it's kernel or user first..
  */
 bad_area:
-	up_read(&mm->mmap_sem);
+	mm_read_unlock(mm, &mmrange);
 
 	/* User mode accesses just cause a SIGSEGV */
 	if ((fault_code & MMUFCR_xFC_ACCESS) == MMUFCR_xFC_ACCESS_USR) {
@@ -349,7 +349,7 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long fault_code,
  * us unable to handle the page fault gracefully.
  */
 out_of_memory:
-	up_read(&mm->mmap_sem);
+	mm_read_unlock(mm, &mmrange);
 	if ((fault_code & MMUFCR_xFC_ACCESS) == MMUFCR_xFC_ACCESS_USR) {
 		pagefault_out_of_memory();
 		return;
@@ -357,7 +357,7 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long fault_code,
 	goto no_context;
 
 do_sigbus:
-	up_read(&mm->mmap_sem);
+	mm_read_unlock(mm, &mmrange);
 
 	/*
 	 * Send a sigbus, regardless of whether we were in kernel
-- 
2.13.6