linux-kernel - [PATCH 46/64] arch/metag: use mm locking wrappers

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Date:   Mon,  5 Feb 2018 02:27:36 +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 46/64] arch/metag: 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/metag/mm/fault.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/arch/metag/mm/fault.c b/arch/metag/mm/fault.c
index e16ba0ea7ea1..47ab10069fde 100644
--- a/arch/metag/mm/fault.c
+++ b/arch/metag/mm/fault.c
@@ -114,7 +114,7 @@ int do_page_fault(struct pt_regs *regs, unsigned long address,
 	if (user_mode(regs))
 		flags |= FAULT_FLAG_USER;
 retry:
-	down_read(&mm->mmap_sem);
+	mm_read_lock(mm, &mmrange);
 
 	vma = find_vma_prev(mm, address, &prev_vma);
 
@@ -169,7 +169,7 @@ int do_page_fault(struct pt_regs *regs, unsigned long address,
 		}
 	}
 
-	up_read(&mm->mmap_sem);
+	mm_read_unlock(mm, &mmrange);
 	return 0;
 
 check_expansion:
@@ -178,7 +178,7 @@ int do_page_fault(struct pt_regs *regs, unsigned long address,
 		goto good_area;
 
 bad_area:
-	up_read(&mm->mmap_sem);
+	mm_read_unlock(mm, &mmrange);
 
 bad_area_nosemaphore:
 	if (user_mode(regs)) {
@@ -206,7 +206,7 @@ int do_page_fault(struct pt_regs *regs, unsigned long address,
 	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
@@ -230,7 +230,7 @@ int do_page_fault(struct pt_regs *regs, unsigned long address,
 	 * us unable to handle the page fault gracefully.
 	 */
 out_of_memory:
-	up_read(&mm->mmap_sem);
+	mm_read_unlock(mm, &mmrange);
 	if (user_mode(regs)) {
 		pagefault_out_of_memory();
 		return 1;
-- 
2.13.6