linux-kernel - [PATCH 44/64] arch/score: use mm locking wrappers

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Date:   Mon,  5 Feb 2018 02:27:34 +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 44/64] arch/score: 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/score/mm/fault.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/arch/score/mm/fault.c b/arch/score/mm/fault.c
index 07a8637ad142..535df3b377a5 100644
--- a/arch/score/mm/fault.c
+++ b/arch/score/mm/fault.c
@@ -81,7 +81,7 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long write,
 	if (user_mode(regs))
 		flags |= FAULT_FLAG_USER;
 
-	down_read(&mm->mmap_sem);
+	mm_read_lock(mm, &mmrange);
 	vma = find_vma(mm, address);
 	if (!vma)
 		goto bad_area;
@@ -127,7 +127,7 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long write,
 	else
 		tsk->min_flt++;
 
-	up_read(&mm->mmap_sem);
+	mm_read_unlock(mm, &mmrange);
 	return;
 
 	/*
@@ -135,7 +135,7 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long write,
 	* Fix it, but check if it's kernel or user first..
 	 */
 bad_area:
-	up_read(&mm->mmap_sem);
+	mm_read_unlock(mm, &mmrange);
 
 bad_area_nosemaphore:
 	/* User mode accesses just cause a SIGSEGV */
@@ -174,14 +174,14 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long write,
 	* 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))
 		goto no_context;
 	pagefault_out_of_memory();
 	return;
 
 do_sigbus:
-	up_read(&mm->mmap_sem);
+	mm_read_unlock(mm, &mmrange);
 	/* Kernel mode? Handle exceptions or die */
 	if (!user_mode(regs))
 		goto no_context;
-- 
2.13.6