linux-kernel - [PATCH 41/64] arch/cris: use mm locking wrappers

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Date:   Mon,  5 Feb 2018 02:27:31 +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 41/64] arch/cris: 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/cris/mm/fault.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/arch/cris/mm/fault.c b/arch/cris/mm/fault.c
index 16af16d77269..decc8f1fbc9d 100644
--- a/arch/cris/mm/fault.c
+++ b/arch/cris/mm/fault.c
@@ -122,7 +122,7 @@ do_page_fault(unsigned long address, struct pt_regs *regs,
 	if (user_mode(regs))
 		flags |= FAULT_FLAG_USER;
 retry:
-	down_read(&mm->mmap_sem);
+	mm_read_lock(mm, &mmrange);
 	vma = find_vma(mm, address);
 	if (!vma)
 		goto bad_area;
@@ -205,7 +205,7 @@ do_page_fault(unsigned long address, struct pt_regs *regs,
 		}
 	}
 
-	up_read(&mm->mmap_sem);
+	mm_read_unlock(mm, &mmrange);
 	return;
 
 	/*
@@ -214,7 +214,7 @@ do_page_fault(unsigned long address, struct pt_regs *regs,
 	 */
 
  bad_area:
-	up_read(&mm->mmap_sem);
+	mm_read_unlock(mm, &mmrange);
 
  bad_area_nosemaphore:
 	DPG(show_registers(regs));
@@ -286,14 +286,14 @@ do_page_fault(unsigned long address, struct pt_regs *regs,
 	 */
 
  out_of_memory:
-	up_read(&mm->mmap_sem);
+	mm_read_unlock(mm, &mmrange);
 	if (!user_mode(regs))
 		goto no_context;
 	pagefault_out_of_memory();
 	return;
 
  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