linux-kernel - [PATCH 42/64] arch/frv: use mm locking wrappers

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Date:   Mon,  5 Feb 2018 02:27:32 +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 42/64] arch/frv: 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/frv/mm/fault.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/arch/frv/mm/fault.c b/arch/frv/mm/fault.c
index 494d33b628fc..a5da0586e6cc 100644
--- a/arch/frv/mm/fault.c
+++ b/arch/frv/mm/fault.c
@@ -86,7 +86,7 @@ asmlinkage void do_page_fault(int datammu, unsigned long esr0, unsigned long ear
 	if (user_mode(__frame))
 		flags |= FAULT_FLAG_USER;
 
-	down_read(&mm->mmap_sem);
+	mm_read_lock(mm, &mmrange);
 
 	vma = find_vma(mm, ear0);
 	if (!vma)
@@ -181,7 +181,7 @@ asmlinkage void do_page_fault(int datammu, unsigned long esr0, unsigned long ear
 	else
 		current->min_flt++;
 
-	up_read(&mm->mmap_sem);
+	mm_read_unlock(mm, &mmrange);
 	return;
 
 /*
@@ -189,7 +189,7 @@ asmlinkage void do_page_fault(int datammu, unsigned long esr0, unsigned long ear
  * 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 (user_mode(__frame)) {
@@ -259,14 +259,14 @@ asmlinkage void do_page_fault(int datammu, unsigned long esr0, unsigned long ear
  * us unable to handle the page fault gracefully.
  */
  out_of_memory:
-	up_read(&mm->mmap_sem);
+	mm_read_unlock(mm, &mmrange);
 	if (!user_mode(__frame))
 		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