linux-kernel - [PATCH 08/22] arch/m68k/kernel/sys_m68k: Use vma_lookup() in sys

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Message-ID: <20210510165839.2692974-9-Liam.Howlett@Oracle.com>
Date:   Mon, 10 May 2021 16:58:52 +0000
From:   Liam Howlett <liam.howlett@...cle.com>
To:     "maple-tree@...ts.infradead.org" <maple-tree@...ts.infradead.org>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>
CC:     Song Liu <songliubraving@...com>,
        Davidlohr Bueso <dave@...olabs.net>,
        "Paul E . McKenney" <paulmck@...nel.org>,
        Matthew Wilcox <willy@...radead.org>,
        Laurent Dufour <ldufour@...ux.ibm.com>,
        David Rientjes <rientjes@...gle.com>,
        Axel Rasmussen <axelrasmussen@...gle.com>,
        Suren Baghdasaryan <surenb@...gle.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        Rik van Riel <riel@...riel.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Michel Lespinasse <michel@...pinasse.org>,
        Liam Howlett <liam.howlett@...cle.com>
Subject: [PATCH 08/22] arch/m68k/kernel/sys_m68k: Use vma_lookup() in
 sys_cacheflush()

Use vma_lookup() to find the VMA at a specific address.  As vma_lookup()
will return NULL if the address is not within any VMA, the start address
no longer needs to be validated.

Signed-off-by: Liam R. Howlett <Liam.Howlett@...cle.com>
---
 arch/m68k/kernel/sys_m68k.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/m68k/kernel/sys_m68k.c b/arch/m68k/kernel/sys_m68k.c
index f55bdcb8e4f1..bd0274c7592e 100644
--- a/arch/m68k/kernel/sys_m68k.c
+++ b/arch/m68k/kernel/sys_m68k.c
@@ -402,8 +402,8 @@ sys_cacheflush (unsigned long addr, int scope, int cache, unsigned long len)
 		 * to this process.
 		 */
 		mmap_read_lock(current->mm);
-		vma = find_vma(current->mm, addr);
-		if (!vma || addr < vma->vm_start || addr + len > vma->vm_end)
+		vma = vma_lookup(current->mm, addr);
+		if (!vma || addr + len > vma->vm_end)
 			goto out_unlock;
 	}
 
-- 
2.30.2